hard disk lists

external ssd recommended

external ssd hard drive has a variety of types such as solid state hard drive, mechanical hard drive and game hard drive, respectively with high-speed, seismic, large capacity, low price and other characteristics, you can choose the right model according to demand and budget. Solid state drives are good for transferring large amounts of data, mechanical drives are good for storing large amounts of files, and gaming drives are designed for gamers.
An portable hard drive is a portable storage device that allows you to easily transfer and back up data between different computers or devices. There are many types of portable hard drives, and according to your needs and budget, you can choose the portable hard drive that is right for you. This article will look at three common types of portable hard drives: solid state drives, mechanical drives, and gaming drives, and give some recommended brands and models.

Solid-state drives (SSDS) are high-speed, lightweight, earthquake-resistant mobile hard drives that have no mechanical parts, making them faster to read and write, and more durable. SSDS are suitable for users who need to transfer large amounts of data quickly or run complex programs, such as video editors, designers, programmers, etc. At present, there are many brands of solid state drives on the market, such as Samsung, Sandisk, Inrui and so on. Among them, the Samsung T3 series is a high-performance, compact SSD that supports USB 3.1 interface and can hold up to 2TB. SanDisk also has a Portable SSD, the SanDisk Portable External SSD, which also supports a USB 3.1 interface and has a maximum capacity of 2TB. The price of these two solid-state drives is about 800 yuan, which is relatively cost-effective.

A mechanical hard drive (HDD) is a high-capacity, low-cost portable hard drive with a rotating disk and magnetic head that makes reading and writing slower and more susceptible to vibration and temperature. However, the advantages of mechanical hard disks are large capacity and low price. Mechanical hard disks are suitable for users who need to store a large number of files or data, such as video enthusiasts, students, office workers, etc. At present, there are many brands of mechanical hard disks on the market, such as Western Digital, Seagate, Toshiba and so on. Among them, Western Digital's My Passport series is an encrypted portable hard drive that supports USB 3.0 ports and can hold up to 5TB. Seagate also has an External Hard Drive, Seagate External Hard Drive, which also supports USB 3.0 and has a maximum capacity of 5TB. The price of these two mechanical hard disks is about 400 yuan, which is very affordable.

Game Drive is a portable hard drive designed specifically for gaming, which can meet the needs of gamers for storage space and read and write speed. Gaming hard drives are usually compatible with certain gaming platforms or consoles, such as Xbox, PlayStation, etc. Gaming hard drives are suitable for those who like to play a variety of games, such as FPS, RPG, MOBA, etc. There is currently a gaming Hard Drive designed specifically for the Xbox, the Seagate Game Hard Drive, which supports a USB 3.0 port and has a maximum capacity of 4TB. This gaming hard drive costs around $600 and allows you to easily store and run games on your Xbox.

external ssd introduce

It is a portable storage device that uses a hard disk as a storage medium to facilitate the exchange of large-capacity data between computers. The device is designed to emphasize portability, making it ideal for situations where you need to carry large amounts of data around with you. There are two main types of mobile hard drives: mobile solid state drives (SSDS) and mobile mechanical hard drives (HDDS). Mechanical hard drives are generally more cost-effective and relatively inexpensive, while solid state drives offer faster transfer speeds and are suitable for users who need to transfer data quickly, especially when working away from home.

The components of a mobile solid-state drive usually include a main controller, a memory unit, and a bridge chip. The housing is generally made of metal, which not only helps to dissipate heat, but also provides protection against pressure and shock. When the hard drive is connected to a computer or phone, an indicator will light up, indicating that the hard drive is working. In terms of interface, the common USB 2.0/3.0 type, and more high-end products may be equipped with USB 3.2Gen 2x2 interface, which means that the portable hard disk transmission speed of this interface can reach 2000MB/s, which means that several GB of video files can be transferred in a few seconds.

Mobile hard disk, mainly refers to the use of USB or IEEE1394 interface, can be plugged in or unplugged at any time, small and easy to carry hard disk memory, at a high speed and the system for data transmission. On products with USB1.1 interface specifications, it takes a long time to transfer a large amount of data. The USB2.0, IEEE1394, cSATA mobile hard disk interface is relatively much better. USB 2.0 interface transmission rate is 60MB/s, USB 3.0 interface transmission rate is 625 MB/s, IEEE 1394 interface transmission rate is 50 to 100 MB/s. Advantages of mobile hard disk: large capacity; Good compatibility, plug and play; High speed; Small size, small mass; Safe and reliable.
The mobile hard disk is mainly composed of a shell, a circuit board (including a control chip and data and power interfaces) and a hard disk. The shell is generally aluminum alloy or plastic material, which plays the role of anti-pressure, anti-seismic, anti-static, anti-fall, moisture-proof, heat dissipation, etc. The control chip controls the read/write performance of the mobile hard disk; Common data interface is USB and IEEE1394 two kinds; Taking into account the size, shock resistance, power consumption, energy saving and other aspects, usually choose 2.5-inch notebook hard disk.

Large capacity

Mobile hard disk can provide a considerable storage capacity, is a more cost-effective mobile storage products. Portable hard disk can provide users with large storage capacity and good portability at an acceptable price range. At present, the mobile hard drives on the market can provide 320GB, 500GB, 600G, 640GB, 900GB, 1000GB(1TB), 1.5TB, 2TB, 2.5TB, 3TB, 3.5TB, 4TB and other capacities, up to 12TB capacity, to a certain extent to meet the needs of users. With the development of technology, the capacity of mobile hard disk will be larger and larger, and the volume will be smaller and smaller.

Small size

Most of the mobile hard disks use USB and IEEE1394 interfaces, which can provide higher data transmission speed. However, the data transmission speed of the mobile hard disk is limited to a certain extent by the interface speed, especially in the USB1.1 interface specification products, when transferring a large amount of data, it will test the patience of the user. USB2.0 and IEEE1394 interfaces are much better.

Fast speed

Most of the mobile hard disks use USB, IEEE1394, eSATA interfaces, which can provide a high data transmission rate. However, the data transmission rate of the mobile hard disk is limited by the interface speed to a certain extent, especially on the products of the USBl.1 interface specification, which will test the patience of the user when transferring large data. The USB2.0, IEEE1394, eSATA interfaces are much better. USB2.0 interface transmission rate is 60MB/s, IEEE 1394 interface transmission rate is 50 ~ 100MB/s, and eSATA, when exchanging data with the host, read a gigabyte order of large files in a few minutes, especially suitable for video and audio data storage and exchange.

Easy to use

Now the PC is basically equipped with USB function, the motherboard can usually provide 2~8 USB ports, some displays will also provide USB adapters, USB interface has become a necessary interface in personal computers. USB devices can be used in most versions of WINDOWS operating systems without the need to install drivers, with a true "plug and play" feature, flexible and easy to use.

Safe and reliable

Data security has always been the most concerned issue of mobile storage users, and it is also an important standard for people to measure the performance of such products. Mobile hard disk has won the favor of many users with the advantages of high speed, large capacity, lightweight and convenient, and the greater advantage is the security and reliability of its stored data. This kind of hard disk is similar to the structure of the laptop hard disk and uses silicon disk. This is a more durable platter material than aluminum and magnetic, and has greater storage capacity and better reliability, improving data integrity. The use of silicon as a material disk drive, featuring a smoother disk surface, effectively reduces the number of irregular disks that may affect the reliability and integrity of the data, and the higher disk hardness makes the USB hard disk have high reliability.

Matters needing attention

The use of mobile hard disk should pay attention to the following problems:
1, do not use for a long time. Use a mobile hard disk with general materials, it is best not to plug in the computer for long-term work, mobile hard disk is used for temporary exchange or storage of data, not a local hard disk. Compared with the internal hard disk will work in a harsh environment at all times, the working time should be shortened as much as possible.
2. Do not defragment the disk. Do not defragment the removable hard disk, otherwise it will easily damage the hard disk. If you really need to organize, the method can be used to copy the data in the entire partition, and then copy back.
3, do not mix the power supply line. Do not mix the power cables. Because the power cables of the mobile hard disk box are dedicated, the voltage of the power cable interface may be different. If you insert them improperly, the box will be burned, and the hard disk will be burned.
4. Don't beat. Don't beat, take lightly; Pay attention to the temperature, do not overheat; Dry and waterproof, pull back first.
5, do not implement hot swap in the transmission process to prevent electromagnetic, dust, water and other external interference.

Product selection

1, mobile hard disk shell: mobile hard disk shell material is generally divided into metal and plastic two kinds. Generally speaking, the metal shell has better compression and heat dissipation performance, while the plastic shell has relatively more advantages in terms of shock resistance and weight .
2, PCB board control chip: the control chip on the mobile hard disk PCB is directly related to the read and write performance and stability of the product. At present, the control chip is mainly divided into high and low two grades. The representative of the high-end control chip is the plath CypressISD300A1 / CY7C68300B CY7C68300C, NECLiPD720133, prosperous nine PL - 3507. The characteristics of these chips: the price is more expensive, stability and compatibility are very good, is the first choice of high-end users. Representatives of low-end control chips are Anguo AU6390, Yangzhi ALi M5642, Skyworth CL811 series and so on. The characteristics of these chips are: stability and data transmission performance is relatively poor, but enough to meet the daily work needs, because of its low price, mostly used in low-end hard disk boxes .
3, hard disk box external interface: at present, the mainstream interface of mobile hard disk is high-speed USB2.0 and LiSB3.0 high-end products can see IEEE1394 or eSATA interface, IEEE1394 interface is divided into IEEE1394a and IEEE1394b two kinds: The IEEE1394a interface data transmission rate can theoretically reach 400Mbit/s(50MB/s). The IEEE1394h interface supports a transfer rate of 800Mbit/s(lOOMB/s). SATA can theoretically reach 3Cbit/s, which is the development direction of mobile hard disks in the future .
4. Quality: There are many so-called brand mobile hard disk on the market is actually assembled by the dealer, that is to say, the manufacturer provides the dealer with only the mobile hard disk box, the dealer gets the box and then put the hard disk into the quality of this brand mobile hard disk can not be guaranteed. Parallel hard disks or even repaired hard disks are likely to be put into mobile hard disk boxes and sold to unwitting consumers. When purchasing such products, please recognize the product's trademark, anti-counterfeiting logo, and ask the dealer for an official invoice and three-pack card. Avoid buying fake goods, invoices and three-pack cards are the proof of after-sales service in the future

Technical parameter

speed

Speed is an important indicator to measure the performance of mobile hard disk, which mainly depends on the data transmission rate and speed of the hard disk.

1. Data transmission rate
The data transmission rate of a hard disk emphasizes the internal transmission rate (the data transmission rate between the hard disk head and the cache), while the mobile hard disk refers more to the data transmission rate of its interface. Because the mobile hard disk is connected to the system through an external interface, the speed of its interface limits the data transmission rate of the mobile hard disk. Although the current USB1.1 interface can provide 12 Mbps; USB 2.0 interface can provide 480 Mbps; IEEE 1394a interface can provide 400 Mbp; IEEE 1394b can provide a data transmission rate of 800 Mbps, but in practical applications will be due to some objective reasons (such as storage devices used in the main control chip, circuit board production quality is good, etc.), slowed down the transmission rate in the application.
2. Speed
The speed of the ordinary hard disk in the home is generally 5400pm, 7200 rpm, etc., and the high speed hard disk is now the first choice for desktop users; For notebook users, 4200 rpm and 5400 rpm are the main, although some companies have released 7200rpm notebook hard drives, but it is still relatively rare in the market.
Mainstream 2.5-inch brand portable hard drives have read speeds of about 15-25MB/s and write speeds of about 8-15MB/s. It takes about 6 minutes and 40 seconds to copy a 4GB DVD movie to a portable hard drive at a write speed of 10MB/s. It takes about 3 minutes and 20 seconds to copy a 4GB DVD movie from a portable hard drive at a reading speed of 20MB/s

Power supply

For laptops, when the 2.5-inch USB mobile hard drive works, the hard drive and data interface are powered by the USB interface. The USB interface can provide 0.5A current, and the working current of the laptop hard disk is 0.7 ~ 1A, and the general data copy will not be a problem. However, if the hard disk capacity is large or the mobile file is large, it is easy to have insufficient power supply, and if the USB port supplies power to multiple USB devices at the same time, it is also easy to have insufficient power supply, resulting in data loss or even hard disk damage. To enhance power supply, a 2.5-inch USB portable hard drive usually provides a power cable that takes power from the PS/2 port or usb port. When moving the hard disk to move large files, etc., you need to connect the PS/2 power supply cord. 3.5-inch mobile hard drives generally come with external power supplies, so there is basically no problem with power supply. IEEE1394 interface can provide up to 1.5A current, so no external power supply is required).
Tip: In terms of power issues, in general, a usb port power supply is sufficient. However, it is possible to encounter the need to connect two interfaces at the same time, so the user is best to buy a data cable with two USB interfaces when purchasing, to avoid the situation of insufficient power supply

dimension

At present, mobile hard drives can be divided into three types by size: 3.5-inch desktop hard drives; 2.5-inch laptop hard drive; 1.8-inch micro hard disk. Among them, the 3.5-inch desktop hard disk has the advantages of fast speed and large capacity, but it is large, heavy and inconvenient to carry, and because the hard disk is designed for the desktop, the shockproof performance is poor, but there are still certain advantages in terms of price and capacity. 2.5-inch notebook hard disk is specially designed for the notebook, the size and weight are smaller. There is also a special design in shock resistance, good shock resistance, the most used in the current mobile hard disk. 1.8 inch micro hard disk, also designed for notebooks, good seismic performance, and size, weight is also the smallest of the three, but its price is higher, the capacity is smaller, more difficult to popularize, more suitable for special needs users.

capacity

Capacity is the storage space of the mobile hard drive. In 2006, the mainstream hard drive capacity was increased from 160GB to larger capacity. At present, the 250G and 320G products are quite cost-effective. The world's largest single disk capacity reached 750G, 320G product market has been quite mature, the price is also very reasonable. And 400G or above products are still a high-priced series, ordinary users rarely consider. Although 160G and 250G are the mainstream capacity, but limited to cost and actual use needs, for general office and home applications, the choice of 80G or even lower 40G has been fully able to meet the needs.

port

The interface type refers to the type of interface used by the mobile hard disk to connect to the computer system, rather than the interface type of its internal hard disk. Because the mobile hard disk can be connected to the system through the interface, the interface determines the performance and data transmission speed of the connection with the system. At present, the common data interfaces of mobile hard drives are USB and IEEE1394. USB is the mainstream interface of mobile hard disk at present, and it is also the interface of almost all computers, with the advantages of hot swappable, unified standards, and multiple external devices. There are two USB standards: USB1.1 and USB2.0. The USB2.0 transfer speed is up to 480Mbps, which is 40 times that of the USB1.1 interface. USB2.0 requires motherboard support and can be backward compatible. The same brand USB2.0 mobile hard disk box is 30 to 50 yuan more expensive than the USB1.1, but because of the huge difference in speed, USB2.0 has become the mainstream of the market.
Before the USB2.0 standard came out, the USB1.1 standard was very slow, with the fastest read and write speed of 1.5MB/s; The IEEE 1394(Firewire interface) read and write speed can be close to about 50MB/s, so for a long time, Firewire is synonymous with high-speed transmission.
However, after the USB2.0 standard came out, the maximum reading and writing speed is close to 60MB/s, so that the Firewire interface is left behind in a flash, and almost all computers have USB connection ports, only a few computers have Firewire ports, so the purchase of mobile hard disk can be completely without considering the use of Firewire interface models. There are new mobile hard drives are beginning to support the USB3.0 standard, USB3.0 while maintaining the compatibility with USB 2.0, the transmission speed is greatly improved: the maximum transmission bandwidth is up to 5.0Gbps, that is, 640MB/s. However, if you are using an Apple computer, Firewire can come in handy at this time, and it is more appropriate to choose a mobile hard disk with a Firewire interface. In general, the Firewire interface is a dispensable thing

quakeproof

In terms of shock resistance, the spindle of the 2.5-inch notebook hard disk adopts FBD (FluidDynamicBearing) liquid bearing motor. The oil film replaces the ball, effectively avoiding the high temperature and noise caused by the friction of the ball. At the same time, the oil film can absorb the sudden vibration very well. On the other hand, laptop hard drives generally use the "zero contact" head start-stop technology. In the non-working state, the magnetic head is in the docking area and does not contact the platter. When working, the magnetic head flying height is low, the advanced silicon disk surface is smooth, and the scratch probability caused by accidental vibration of the magnetic head is greatly reduced. These technologies reduce the probability of damage to the mobile hard disk during movement. As a result, many original well-known brand hard drives have passed hundreds of drop tests at different angles in professional laboratories

Development trend

With the rapid application of the Internet, the popularity of all kinds of digital consumer electronic products and the continuous development of the concept of mobile in various fields from business office to personal entertainment and leisure, the demand for personal data storage, especially the demand for mobile storage, is growing faster and faster. Over the past few years, in the mobile storage market, mobile hard disk with its relative to optical media storage (such as CDRWDVDRW, etc.) higher access speed, simpler access process and relative to flash storage (that is, U disk) larger capacity, lower price and other advantages, more and more by ordinary consumers and commercial users, the market space is also growing.
However, in the rapid development of technology, more diversified products, and increasingly fierce competition in the market environment, the trend and development of the market has shown some trends that can be grasped.
Minimize volume, maximize capacity
"Minimize volume, maximize capacity" can be said to imply the development trend of the entire mobile storage device: easy to carry, large space. IBM released its first 1-inch hard drive in 1999 with a capacity of 340MB, increased the capacity to 1GB in 2000, and by 2009, the production 1-inch hard drive could provide more than 4GB of storage space on a disk the size of a five-cent yuan coin. Enough to make a home in a variety of small and dainty consumer electronics. At the same time, as of 2009, the maximum capacity of the 2.5-inch notebook hard drive, which has basically become the standard configuration of mobile hard drives, has reached 80GB, almost equal to the capacity of mainstream desktop hard drives. Although the 1.8-inch hard disk entered the mobile storage market late, it perfectly reconciled the contradiction between volume and capacity. The capacity of a 1.8-inch hard disk is about 50-75% of that of a 2.5-inch hard disk, but it is thinner, smaller, and lighter than a 2.5-inch hard disk. From the perspective of the world's newest and smallest mobile hard disk, 1.8 inches, the structure design is exquisite and compact, and the volume of the entire product is condensed to 68mm×91mm×15mm under the optimal operation, which is equivalent to 1/2 of the traditional 2.5-inch mobile hard disk. It is the smallest mobile hard disk on the global market. As smaller portable devices that require tens of gigabytes of internal storage come to market, we will see more and more adoption of 1.8-inch portable hard drives.

Speed up - the speed at which data is accessed

The access speed of mobile storage devices is still greatly improved. First of all, the interface standard of mobile hard disk has been upgraded from USB1.1 to USB2.0, which is an important milestone in the development of mobile hard disk. The traditional USB specification is specifically designed for low-speed device communication, which determines that its data transmission rate can only reach 12Mbps, but due to the wide application of large files such as video and audio, database and game software, the access speed of mobile storage products has been challenged. USB2.0 interface, the data transmission rate can reach 480Mbps, greatly improving the data transmission speed. As of 2009, more and more mobile storage products on the market began to support USB2.0 interface, Siba company's Pepsi mobile hard disk series products, USB2.0 interface is also standard configuration, so that the series of products not only has the advantages of small volume and large capacity mentioned in the above trend, And in terms of data transmission speed, it also occupies a leading position in the entire mobile storage market.
However, as the industry is widely concerned: Has the USB2.0 interface standard reached the limit of mobile storage in terms of transmission speed? Is it possible that there will be faster interface standards in the future?

Practical - integrating multiple technologies

In 2009, domestic mobile storage manufacturers began to promote multimedia mobile hard drives. Gradually integrate the functions suitable for mass consumers, such as the multimedia mobile hard disk that can play high-definition movies, the high-definition player that can download movies directly with the Internet cable, and the multimedia mobile hard disk player that can also read news, check the weather, and stock online, combining data storage with audio and video entertainment.
The wireless hard disk housing is provided with a USB chip, the housing is also provided with a Bluetooth module and an infrared transmission module respectively connected with the USB chip, and the upper part of the housing is provided with a Bluetooth and infrared switch knob. The U disk can transmit data with computers and other devices through infrared transmission or Bluetooth transmission, eliminating the process of physical plugging, thus greatly extending the service life of the mobile hard disk; At the same time, due to the existence of the Bluetooth module, the mobile hard disk can be used by multiple computers at the same time, which greatly improves its utilization efficiency.

Secure storage

There is no doubt that users are the most concerned about the data security of mobile storage products. Data confidentiality, stability, etc., as a product's sale points (selling points) are direct and indispensable. This development trend is also an important guarantee that mobile hard disks have always occupied a place in the mobile storage product market. Although compared with flash memory, mobile hard disk is temporarily at a disadvantage in shockproof, safety and other performance, but mobile hard disk manufacturers for shockproof, anti-fall and other safety technology exploration has never stopped. In the case of Siba Electronics, many of the technologies applied to the Pepsi 1.8-inch portable hard drive give this product a unique advantage in secure storage. Its automatic balancing roller system can protect the hard disk in harsh environments or sudden vibration can still operate normally, to maximize the protection of hard disk and data security. In addition, Patriot's unique seismic mobile hard disk technology is sought after by consumers who are concerned about storage security. After analysis, human accidents such as accidental falls and collisions are important reasons for threatening data security. Three-dimensional dynamic shock absorption technology. This is AIGO own independent intellectual property rights of shock absorption technology. When the mobile hard disk crashes, the impact energy transmitted to the hard disk is reduced, thus protecting the hard disk data. After security testing, Patriot mobile hard disk can guarantee 1.5 meters fall and the data is safe, and bought a security insurance for the data. At the same time, in the market, there are more and more products in the direction of hardware encryption.

Stylish appearance

As with the development of all electronic products, users of mobile hard drives also have fashionable requirements for the appearance of products, especially when it is a durable consumer product that can be carried around and shown to others. In addition to the appearance of the mobile hard disk is getting smaller and smaller in volume, lightweight and cute, its material performance, feel, decoration, color, and product appearance have also become the demanding conditions of consumers. Mini (Mini) represents not simple, but the synchronous improvement of quality, and the beauty of internal and external repair. Wavy full-metal shell design products, such as Siba's Pepsi Ling, in addition to breaking through the limitations of volume, but also in the shape of a better, with a unique personality and quiet style, with a variety of color design, calm and quiet lake blue, cool and cold gray, soft and elegant purple and dazzling silver white, Bring perfect fashion feeling to different users.
The market is increasingly rich in products, at the same time, the trend of demand and consumption will slowly obtain two-way stability. Although the future market competition will be more intense, but the progress of product technology and the stability of market order will make the majority of mobile storage users and competing manufacturers profit at the same time. With the gradual strengthening and emergence of the comprehensive strength of manufacturers such as Silicon Power Electronics, the leadership of the major players will become more prominent, which will ultimately determine the market share of their products. The future of mobile storage will bring users a better experience

Common fault

Mobile hard disk is used more in the office field, the following introduces several common mobile hard disk troubleshooting cases.
A frequent crash occurs when copying data to an external hard drive
This is not the case when an external hard drive performs the same operation in another computer. Because most of the current mobile hard disks are powered by the USB interface on the motherboard, if the USB interface power supply capacity is insufficient, resulting in unstable voltage when data is exchanged through the USB interface, there will be a crash failure. If the mobile hard disk supports an external power supply, it is best to use the external power supply to power it. If the external power supply is not supported, it is best to reduce the amount of data transmitted, that is, a large amount of data is transmitted multiple times. In addition, if the operating system is unstable, it may also cause the mobile hard disk to crash while working. These external devices have really high power requirements. Therefore, the standard power supply of the computer is 300W.
Blue screen often occurs when using an external hard disk
At first, the USB interface was suspected of insufficient power supply, and after replacing the high-power power supply, the fault remained. Later suspecting that the system was unstable, it was found that there was no driver installed for the VIA(VIA) chipset that came with the motherboard, and in the driver, there was a special USB driver. After reinstalling the motherboard driver, the fault is rectified.
Maintenance tips: Although the Windows operating system comes with a lot of hardware drivers, can also be installed normally, but for some parts that are not compatible, it is best to install the original driver.
The system cannot detect the portable hard disk
Fault symptom: The mobile hard disk is connected to the computer, the hard disk makes a sound of "click, click", the indicator on the hard disk keeps blinking, the system can normally detect the USB device, but can not view the icon of the mobile hard disk.
Fault diagnosis: The fault may be caused by the unstable voltage of the USB port. If the system can detect the USB device, it indicates that the system can detect the hard disk. According to the indicator keeps blinking and accompanied by the sound of "click, click", it can be judged that the mobile hard disk is not damaged.
Troubleshooting: Replace the hard disk to another computer, and troubleshoot if it can be used normally.
Unable to copy files to portable hard drive
Symptom: Connect the mobile hard drive you just bought to your computer, sometimes you can copy the file, sometimes you can't copy it. What is the reason for this?
Analysis and treatment: This is also caused by insufficient power supply. Because the USB hard disk also needs to consume a certain amount of power when working, if the power is accessed directly through the USB interface. Power shortages are likely. Almost all mobile hard disks are attached with a separate external power supply or PS/2 adapter, then as long as the external power supply is connected in advance or through the PS/2 adapter connection, the problem can generally be solved.
Not available with USB extension cable
The mobile hard disk can be used directly into the computer, but the USB extension cable connected to the USB flash drive can not be used, what is the reason?
Analysis and processing: From the problem described above, it is mainly caused by the use of USB extension cable. Because the mobile hard disk is the interface of the USB20 standard, this requires that the cable connecting the computer and the mobile hard disk must support the USB2.0 standard. Therefore, the use of the USB1.1 standard connection cable for the USB flash drive will cause the USB20 standard mobile hard drive to not be correctly identified. Simply replace a USB2.0 standard cable to resolve the problem.
The file name in the portable hard drive is garbled
Fault phenomenon: Just buy not long mobile hard disk just started to use is very normal, some time ago copy some files into, after a few days only to find that the file name of the mobile hard disk files have become garbled. Why is that?
Analysis and processing: The case of garbled file names is mostly caused by the incorrect use of mobile hard disks. For example, the mobile hard drive is removed directly without "safely deleting USB devices", or the mobile hard drive is read and written when the USB port power supply is insufficient. In addition, the mobile hard disk track or sector error, may also lead to the mobile hard disk file name garbled, of course, the most likely cause of such problems is the mobile hard disk power supply is insufficient, many mobile hard disk need double USB interface to achieve power supply and data transmission, if the use of such mobile hard disk, it is necessary to pay attention to must connect.
Problems with dual USB ports
For this kind of problem, if the hard disk is not a serious fault such as bad sectors, generally use the disk tool of Windows can be repaired, the method is as follows: Right-click the folder of the mobile hard disk partition with garbled characters, and choose "Properties" command from the pop-up menu. In the Properties dialog box that opens, switch to the Tools TAB and click the Start Check button in the Debug column

Product encryption

Many users often take a notebook to go out to work, or use a U disk or mobile hard disk to carry a variety of data, but in case of accidental loss, it will cause data disclosure. Is there a way to avoid this? The answer is yes, using BitLocker encryption can also be used to encrypt mobile hard drives, USB sticks, and non-system partitions of computers, and only enter the correct password to access the data inside. In this way, whether the U disk is lost or the notebook is moved by the thief, you do not have to worry about the information inside will be leaked.
The steps for encrypting a non-system partition of a hard drive are exactly the same as for encrypting a USB flash drive.
Encryption method
Step 1 Right click on the partition you want to encrypt, select the "Enable BitLocker" option, then select the "Unlock drive with password" check box in the dialog box that pops up, and set the password in the corresponding field. After setting up, click the "Next" button.
Step 2 In order to avoid the embarrassment of the user forgetting the key and losing access to the data, the wizard provides the recovery key. Users can save the recovery key to a file or print it out and put it in a safe place. In this example, save to a file.
Step 3 Click the "Start Encryption" button to start encryption. The encryption process may take several minutes or longer, depending on the size of the drive. Please wait patiently. After the encryption is complete, click Close in the dialog box that is displayed.
After the encryption is complete, to access the encrypted USB flash drive or hard disk partition in the future, you need to enter the correct password to unlock the drive

computer hard disk

CONTENTS

I. Introduction

1. Hard disk disk
2. Read and write heads
3. Motor and controller
Four, the working principle of computer hard disk

1. Read and write principles of computer hard disk
2. Workflow of computer hard disk

Five, the classification of computer hard disk

1. The difference between mechanical hard disk and solid state hard disk
2. Computer hard drives of different sizes and capacities
3. Common computer hard disk models and sizes

The computer hard disk is a very important storage device in the computer, which is responsible for storing information such as the operating system, applications, files and data. Over time, the appearance and basic composition of computer hard drives have also evolved and improved. This article will from the appearance, basic composition, working principle, classification, maintenance and maintenance of many aspects, the characteristics and functions of computer hard disk in detail.

I. Introduction

A computer hard disk is a mechanical storage device used to store data and programs in a computer. With the continuous development of technology, the capacity and speed of computer hard drives are also increasing. At present, there are mainly two types of mechanical hard disk and solid state hard disk on the market, in which the mechanical hard disk uses a rotating disk and read and write magnetic head for data storage, while the solid state hard disk uses flash memory particles and controllers for data storage.

Second, the appearance of the computer hard disk

Computer hard drives are usually rectangular and about the size of the palm of your hand. The main interface types are SATA, SAS, USB, etc., of which SATA interface is the most widely used interface type at present. In addition, the external structure of the computer hard disk also includes the power interface, data interface, fixing screws and other parts.

Three, the basic composition of computer hard disk

1. Hard disk disk

Hard disk platters are the core components of a computer's hard disk and are used to store data. Platters are usually made of aluminum alloy and coated with a magnetic material. The disk rotates at a high speed, and the read and write head flies on the surface of the disk, and the data is read and written by changing the magnetic state of the surface of the disk.

2. Read and write heads

A read/write head is a part of a computer's hard disk used to read and write data. The magnetic head is usually made of ferrite material and has extremely high sensitivity and precision. The magnetic head realizes the reading and writing of the magnetic state on the disk through the principle of electromagnetic induction. When working, the magnetic head needs to be suspended at a certain distance from the surface of the disk to ensure the normal read and write operation.

3. Motor and controller

Computer hard drives also contain components such as motors and controllers. The motor is used to drive the rotation of the platter, usually a brushless DC motor. The controller is responsible for controlling the movement of the read and write magnetic head and data transmission and other operations, which are usually implemented by special chips. In addition, the controller also has error detection and repair functions to ensure data integrity and reliability.

Four, the working principle of computer hard disk

1. Read and write principles of computer hard disk

The read and write operation of the computer hard disk is realized by flying the read and write head on the surface of the disk. When the data needs to be read, the read and write head will find the corresponding data area on the surface of the disc, and then convert the magnetic state of the surface of the disc into an electrical signal through the principle of electromagnetic induction, and then transmit to the computer after amplification and processing. When data needs to be written, the read and write magnetic head will find the corresponding data area on the disk surface, and then achieve the data writing by changing the magnetic state of the disk surface.

2. Workflow of computer hard disk

The work flow of computer hard disk mainly includes the following steps: First, the computer issues read and write instructions to the controller; Then, the controller controls the motor to drive the disk rotation, and moves the read and write head to the corresponding data area; Next, the read and write head reads and writes data; Finally, the data after reading and writing is transmitted to the computer through the controller. In the whole process, the controller plays a core role, which not only controls the precise movement of the read and write head, but also handles tasks such as data transmission and error detection.

Five, the classification of computer hard disk

1. The difference between mechanical hard disk and solid state hard disk

Mechanical hard drives and solid state drives are the two main types of computer hard drives on the market today. Mechanical hard drives use rotating platters and read/write heads for data storage, while solid state drives use flash memory grains and controllers for data storage. Compared to mechanical hard drives, solid state drives have higher speed and stability, but they are also more expensive. In addition, the capacity of SSDS is usually smaller than that of mechanical hard drives.

2. Computer hard drives of different sizes and capacities

Computer hard drives come in a variety of sizes and capacities. Specifications mainly include interface type, disk number, cache size and other parameters; The capacity mainly includes different specifications such as TB level and GB level. Different specifications and capacities of computer hard disks are suitable for different application scenarios and requirements. For example, high-capacity mechanical hard drives are suitable for storing large amounts of data and files, while high-speed solid-state drives are suitable for programs and application scenarios that need to get up and running quickly.

3. Common computer hard disk models and sizes

(1) 2.5-inch hard disk: 2.5-inch hard disk is the standard size of notebook hard disk, small size, easy to carry. Its capacity is usually between 160GB and 2TB, and the speed is generally 5400rpm or 7200rpm. In addition, 2.5-inch hard drives are available in thinner models, such as 7mm and 9.5mm thicknesses, for different types of laptops.
(2) 3.5-inch hard disk: 3.5-inch hard disk is the standard size of desktop hard disk, the volume is larger, the capacity is usually between 500GB and 20TB. Its speed is generally 7200rpm or 5900rpm, and there are higher speed models up to 10,000 RPM or 15,000 RPM. The 3.5-inch hard disks also have different types of interfaces, such as SATA and SAS, which are suitable for different application scenarios and requirements.
(3) The M.2 hard disk refers to the solid-state hard disk with the M.2 interface, which has a smaller appearance size, faster read and write speed, and the price is similar to the SATA interface solid state disk. In addition to being a system disk, the M.2 hard drive can also be used as a mobile solid state drive. Some M.2 SSDS on the market using large brands of original particles have stable and reliable performance, such as the Inderm P3 series, with sequential write and sequential read speeds of up to 3000MB/s and 3500MB/s, respectively, basically reaching the upper limit of PCIe 3.0. There are three types of M.2 hard drives: SATA, AHCI, and NVMe, of which NVMe drives are the fastest.

Hdd Meaning

The computer hard disk is the main storage device of the computer. Hard Disk (Hong Kong and Taiwan called hard disk, English name: Hard Disk Drive, short for HDD full name Winchester hard disk) consists of one or more aluminum or glass disks. The discs are covered with a ferromagnetic material.
The vast majority of hard drives are fixed drives, permanently sealed and secured in the hard drive. Early hard disk storage media were replaceable, but today's typical hard disk is a fixed storage medium, sealed inside the hard disk (except for a filter hole to balance air pressure). With the development, removable hard disk also appeared, and more and more popular, more and more types. Most of the hard disks installed on microcomputers are called "winchester hard disks", or simply "warm disks", because they use Winchester technology.

An HDD is a mechanical storage device consisting of a disk, a magnetic head, and a motor. It has the characteristics of large storage capacity, low price and high durability, and is suitable for personal computers, servers, multimedia storage and data backup scenarios. Compared with SSDS, HDDS have the advantage of being cheap and widely applicable, but they are slower to read and write and less earthquake-resistant.
HDD is called hard disk drive, the internal disk, magnetic head, motor and other components, by rotating the disk and moving the magnetic head to read and write data. This article describes the working principle, features, and application scenarios of HDD.
First, the working principle of HDD

An HDD is a mechanical storage device that consists of a disk, a magnetic head, a motor, and other components. The disk, the most critical component of an HDD, is a metal disk coated with a layer of magnetic material.

The magnetic head is a device used to read and write data, which is located on the surface of the disk and can be moved to different tracks to read and write data. A motor is a device used to drive disk rotation, which can make the disk spin at high speed. HDDS work by spinning disks and moving magnetic heads to read and write data.

A primary computer storage medium consisting of one or more aluminum or glass discs. The discs are covered with a ferromagnetic material. The vast majority of hard drives are fixed drives, permanently sealed and secured in the hard drive. Removable hard drives are becoming more and more popular, and there are more and more types.

A hard disk drive (HDD) is a device in a personal computer that controls the hard disk's addressing and access to data. Through the hard drive, the computer can store data. Although hard drive and hard disk are two concepts, because the two are usually packaged together, either hard disk or hard drive usually refers to the device formed by combining the two.

A mechanical hard disk mainly consists of a magnetic head and a disk. The magnetic head is a key part of the mechanical hard disk to read and write data. When a mechanical hard disk is working, the head writes track data or reads existing data while the disk is spinning.

Early desktop computer hard disk use IDE interface, IDE interface hard disk is cheap, but the cost performance is low; Most personal computers use SATA interfaces or SCSI interfaces. The advantage of a SCSI interface hard disk is that up to seven different devices can be attached to the same controller panel. Since the hard drive spins at a constant high speed of 3000-15,000 revolutions per minute, it takes only a short time to read data from the hard drive.

If the SSD is powered off, the current may disturb the main control, which causes the main control to break down. Therefore, users who use solid state drives, please do not arbitrarily power off. Although SSDS are in principle several orders of magnitude less likely to break than mechanical hard drives, they still cannot withstand human failure.

Second, the characteristics of HDD

1, large storage capacity: storage capacity can reach several TB or even tens of TB, to meet the needs of large-capacity data storage.

2, read and write speed is slow: because HDD is a mechanical storage device, read and write speed is slow, such as reading data, need to wait for the head to move to the correct track.

3, the price is cheap: compared with SSD and other solid state drives, the price of HDD is cheaper.

4, high durability: HDD is a mechanical storage device, relatively durable.

5, wide range of application: HDD is suitable for a variety of computers and servers, can meet the needs of different application scenarios.
3. Application scenarios of HDD

HDD is applicable to a variety of computers and servers and can meet the requirements of different application scenarios, including the following:

1, personal computers: HDD is suitable for personal computers, can be used to store operating systems, applications, documents and other data.

2, server: HDD is suitable for servers, used to store a large amount of data, such as website data, database data, etc.

3, multimedia storage: HDD is suitable for multimedia storage, can store music, video, photos and other multimedia data.

4, data backup: HDD is suitable for data backup, can be used to back up important data, protect data security.
Fourth, HDD and SSD comparison

Solid State Drive (SSD) is a type of solid state drive (SSD), which has higher read/write speed and stronger shock resistance than HDD. Power consumption is low, but SSDS are relatively expensive.
V. Summary

The features of HDD include large storage capacity, slow read and write speed, low price, high durability, and wide application range. HDD is applicable to a variety of computers and servers and can meet the requirements of different application scenarios.

Compared with SSDS, the advantages of HDD include cheap price and wide application range, and the disadvantages include slow read and write speed and poor shock resistance.

Portable Hard Disk

CONTENTS

Introduction to Portable Hard Disk alias name is Portable ssd
Product characteristics

Large capacity
Small size
High speed
Easy to use
Safe and reliable
Matters needing attention
dimension
capacity
port

Introduction to Portable Hard Disk alias name is Portable ssd

Portable hard disk is a kind of portable storage device, which uses the hard disk as the storage medium, so that computers can easily exchange large-capacity data. The device is designed to emphasize portability, making it ideal for situations where you need to carry large amounts of data around with you. There are two main types of mobile hard drives: mobile solid state drives (SSDS) and mobile mechanical hard drives (HDDS). Mechanical hard drives are generally more cost-effective and relatively inexpensive, while solid state drives offer faster transfer speeds and are suitable for users who need to transfer data quickly, especially when working away from home.