A variety of computers do not recognize mobile hard disks, and computers cannot recognize mobile hard disks.

Source: Internet
Author: User
I. Do not recognize problems with mobile hard disks
1. Change the USB interface: Some USB interfaces cannot be used at the same time (when the front-end is enabled, there will be 1-2 interfaces blocked), or even no connection lines. Check whether the USB connection is correct.
2. Connect the Two USB interfaces of the mobile hard disk. Because the current of the 2.5-inch 40 Gb mobile hard disk must reach or even exceed MMA, the maximum power supply current of the USB interface is generally MMA.
3. independent power supply to the mobile hard drive. This method is recommended because it does not affect the normal power supply of the computer system, reduces the Computer load, and ensures the stable operation of the computer.
2. unplugging the mobile hard disk cannot be properly shut down
The current motherboard and source all adopt the ATX board design to Support Program soft shutdown, but before the soft shutdown, You need to close a series of running programs, because there are often compatibility and bugs between various operating systems and the design of different chipset and motherboard manufacturers, Windows often cannot shut down or even crash when performing soft shutdown. At this time, the novice often suffers a misoperation of force-breaking the power supply. At this time, the hard disk reset operation is not completed during work, which may cause physical damage to the hard disk due to friction between the head and the disk, in case of irreparable bad sectors or even 88.
In case of a soft shutdown failure, press the reset key in the reset box. After the system is restarted, re-enter the system and then perform the shutdown operation to reset the hard disk head. It is best to disable the computer after removing the hard disk. Because, even if the security deletion operation is performed correctly, the hard disk is still powered, and the disk is running, removing the hard disk will cause a strong impact on the computer and hard disk, which is harmful.
Mobile hard disk usage Problems
1. Move the hard disk box to connect to the hard disk. First, set the jumper mode of the hard disk to the position of the main disk. For the jumper method, see the hard disk legend. Connect the external power source first, and connect the USB data cable after the hard disk is working and rotating normally. If the USB interface cannot be identified, the USB interface can be used normally. you can install the USB driver that comes with the motherboard.
2. After the USB mobile hard drive is connected to the computer, the system does not prompt "USB device discovery.
No interrupt number is assigned to the USB interface in the bios, which causes the system to fail to identify and manage the USB device. Restart the computer and enter the BIOS settings window. In "PNP/PCI configuration", set "Assign IRQ for USB" to "enable ", in this way, the system can allocate available interrupt addresses to the USB port.
3. We recommend that you connect the mobile hard disk to the USB interface on the rear motherboard of the computer, and connect the mobile hard disk to the USB interface on the front of the computer, while the USB interface on the front is generally connected to the extended cable, the on-board USB interface is introduced to the front end of the Computer housing, so the increased power consumption makes the hard disk unable to work normally, the system cannot detect the device with the correct name or only the device with the mobile hard disk box. Naturally, the driver cannot be installed and may not be identified. The USB transmission line should be connected to the USB interface behind the computer, and the PS/2 auxiliary power cord should be used to connect to the keyboard or mouse interface of the computer for testing. To connect to the PS/2 interface, you need to connect to the USB interface when the computer is turned off.
Note: because the computer BIOS version is different, see the motherboard manual attached to the computer for detailed settings.
4. if you encounter this problem on the nforce motherboard, You can first install the latest nforce-specific USB2.0 driver and patch, the latest motherboard patch, and the operating system patch, if the problem persists, refresh the BIOS of the motherboard.
5. When fdisk is used for formatting in Win98/Me, the capacity of the mobile hard disk cannot be correctly identified. In Win2000/XP, the hard disk cannot be formatted as a file system in FAT32 format.
Find the mobile hard disk under "disk drive" in the Device Manager, change its "attribute deleteable" option to unselected, and restart the computer; our driver is deselected by default during installation, but if other USB devices are used, this option may have been changed to the selected status. Because 2000 and XP operating systems do not support formatting of FAT32 larger than 30 GB, You Can format it in 98 system or use software such as PQ. The 98 system does not support partitioning large-capacity hard disks, so you must partition them in Win2000 or XP.
6. After the mobile hard disk is connected, the computer does not respond.
If the mobile hard disk is not displayed on the computer after the USB hard disk is connected according to the normal operation. Check "general serial bus controller" in "My computer \ Control Panel \ System \ Device Manager". If no such item exists, you must restart the computer, press the Del key at startup To Go To The CMOS settings. Set "USB control" to "enabled" in "chipset features setup" or "Integrated peripherals", save and start the computer.
Note: because the computer BIOS version is different, see the motherboard manual attached to the computer for detailed settings.
7. Mobile hard drive in Win98/win me. The driver is correctly installed, but there is no drive letter.
Make sure that the USB mobile hard disk works properly in Device Manager. If it is normal, go to "disk drive" in "Device Manager", select the mobile hard disk, click "properties", tick the "deleteable" option in "Settings", and restart the computer.
8. Access the mobile hard disk before starting the computer. There will be a double drive letter on the computer, with the same content or inaccessible content.
Some motherboard BIOS supports USB device detection. After a mobile hard disk is connected, the BIOS of the motherboard detects the connected USB device and automatically assigns a device number to it. However, when the operating system is started, the system detects the USB device and loads the USB Plug-In device again to allocate the device number. Therefore, dual drive letter occurs in the operating system. Solution: connect the device after the computer is started.
Generally, this function cannot be disabled on computers, but USB products support hot swapping and can be used to access products when computers operate desktops.
9. Why is the drive letter not found after the mobile hard disk is attached to 2003.
In the operating system, the drive letter must be manually specified for the partition of the mobile hard disk. Make sure that the device is properly installed. (If the mobile hard drive device is not working properly, please refer to instructions on installation methods and precautions ). You can right-click my computer and select disk management in the displayed "Computer Management" window ". In the lower-right corner of the window, there should be "disk 0" and "Disk 1" (or more ). Among them, "Disk 1" (should be your actual mobile hard disk), the following long bar shows your mobile hard disk partition and the status of each partition, but each partition has no drive letter. You only need to add the drive letter separately ". Right-click the corresponding partition bar and choose change driver ID and path from the drop-down menu. Specify the driver number as prompted.
10. There is a slight noise in shaking the mobile hard disk, and whether there are components falling off.
This is because there is a certain gap between the balanced beads and the disc, and it is normal to make a certain noise during shaking.
11. Speed of mobile hard disks. But the transmission speed is similar to 1.1.
If it is a 2.0 mobile hard drive, only the USB port of the computer is also 2.0, and the USB interface on the computer is 1.1, the transmission rate is also 1.1. Generally, the transmission rate of 1.1 is less than 1 Mbit/s. If the transmission rate exceeds 1 Mbit/s, it is generally 2.0 transmission speed. The transmission speed varies with the computer configuration. If the USB port of your computer motherboard is 2.0, check whether the 2.0 driver is correctly installed in the general serial bus controller of the Device Manager. In addition, the USB port device in the BIOS is set, and the transmission mode contains fullspeed and HiSpeed. If you are using USB2.0, set it to HiSpeed. fullspeed is used to simulate high-speed transmission, no HiSpeed fast!
12. Can I use it on an apple machine after formatting on a PC?
If the mobile hard drive is unavailable on PCs and Mac machines, you can use the macopen software (which can be downloaded from the Internet) to format it in mac mode on PCs. If you have used Mo, you will have more experience in this aspect, because Mo will encounter the same problem during formatting. However, it is worth reminding you that even a hard drive with too many formatting times will reduce its service life.
13. If you use a mobile hard disk in Windows 95, NT, and other operating systems, you can use the following solutions:
In Windows 95 and NT operating systems, the system itself does not support any USB devices, because Microsoft has not developed a USB driver under Windows 95/NT, so it cannot use a mobile hard disk. If the host is in the LAN, you can access and share the mobile hard disk through other operating systems.
14. In Win2000 or WINXP systems, mobile hard disks cannot be popped up or closed in the system.
Other programs in the system are accessing the data in the mobile hard disk, resulting in read/write operations on the mobile hard disk. To close all programs that operate on a mobile hard disk, it is necessary to close the virus firewall and other software in the system when a mobile hard disk is popped up.
15. Unable to boot the system from the mobile hard drive.
The boot settings of the boot system using a mobile hard disk must be set to start from a USB device in BIOS boot settings. Set boot device in BIOS settings to USB-ZIP ". If the BIOS is not supported, you must update the latest BIOS version.
16. There is no problem with the product itself. Why cannot it be used under Win98?
There may be two reasons. One is that the product is incorrectly formatted as NTFS, so it cannot be displayed under Win98-the solution is to delete the partition format in Win2000 and above operating systems, and Then reformat. Of course, FAT32 partitions larger than 32 GB must be formatted below Win98, while fat partitions smaller than 32 GB can be formatted under Win98 or Win2000/XP/Sever. Another reason is that you did not select "deleteable" under "Win98/Me ". The operation method is as follows: In the Device Manager, under the disk drive, the newly added items (before and after the mobile hard disk is compared), select "Settings", and select the "deleteable" check box, click "OK" to restart the computer.
17. There is no problem with the product itself. Why is it unavailable in Win2000/XP/Sever?
Win2000, XP, and sever are both NT-based operating systems with strict security policies. By default, they do not assign drive letters to mobile storage devices. In this case, the user needs to manually allocate the corresponding drive letter to the mobile storage products. The procedure is as follows:
Right-click my computer-> Manage-> Disk Manager, and right-click on the Newly Added Disk-> change the drive name and path. Click "add" in the pop-up window ". Select "specify drive letter" and click "OK ". Open "my computer" and you will see the new drive letter.
18. When the driver is installed under Win98, an error is prompted every time. Why?
First, you can try to use the USB driver of the public version that comes with Microsoft (the driver is embedded in the Win2000 and later operating systems, so you do not need to install the driver for most USB interface devices above Win2000, the driver can be found in huajun Software Park, with the file name Microsoft USB storage UDA drivers.zip). If the driver of the public version is still faulty, check whether the computer is poisoned, check whether the new version of anti-virus software is effective. Another possibility is that some files in the operating system are incorrect. Therefore, you need to reinstall the operating system.
19. Why cannot I use a mobile hard disk on an NT server?
Windows NT does not support USB interface devices. This issue is not a product defect, but a Microsoft issue. Microsoft originally planned to release SP6 to NT to support USB interface devices. However, due to strategic adjustments, SP6 has never been released, but Win2000 has been launched directly. Therefore, the USB interface cannot be used at nt.
20. The mobile hard disk has been in normal use and cannot be used normally after a period of time. Only when the power light is on, the data light is not on, but the hard disk itself is not faulty?
Frequent USB interface plugging may cause a logic error of the USB-to-ide controller on the PCB. In this case, you can open the product and remove the hard disk from the PCB, use the original data cable to connect the PCB and computer. When the data lamp is not on, the logical reset can be completed if the power lamp is on normally. Re-install the hard disk on the PCB to solve the original problem. Of course, many original mobile storage devices have a very low chance of such problems.
21. When a mobile hard disk is connected to a computer, it can often hear abnormal sound, but it can still be used. My mobile hard disk accidentally fell onto the ground, And now it can be used to connect to the computer, what is the danger?
Bumping will cause damage to the hard disk. Although it can be used for the time being, it is strongly recommended to back up the disk in time. After all, losing the file will not cause any loss to everyone. If you have the conditions, you can contact the manufacturer for after-sales service. If you are buying a product that is hard to guarantee or has been out of warranty, we recommend that you use "lformat" for low-level formatting, the original symptoms can be used normally if they continue to appear every month. -- This method is dangerous and should be used with caution!
22. When reading and writing data on a mobile hard disk, "cache error" and other prompts often appear. What should I do?
Generally, most of the above symptoms are caused by poor data line quality or loose connection. Just replace a new data line; you can change the "Enable write cache" option in "disk properties" of the corresponding disk in "Device Manager" to check whether the problem can be solved. If the problem persists for this device, in addition, there are similar problems in multiple computers, and it is confirmed that there is no virus, it may be a hardware fault, at this time, it should be reported for repair in a timely manner.
23. Users who use a USB mobile hard disk sometimes encounter this problem: some garbled directories are found on the hard disk. When you use the DELETE command in Windows to delete a directory, the computer prompts that the file system error cannot be deleted! If you want to format the hard disk, there are many other important files on the USB hard disk. How can I delete these garbled directories?
First, find out the cause of the problem. After multiple experiments, I found that the main reasons for creating a directory with garbled characters are:
(1) When the USB hard disk has not completely completed the read/write task, dial the hard disk.
(2) read and write files when the power supply voltage of the USB hard disk is insufficient. During reading and writing one or more large files, the operating system has a blue screen. This occurs when multiple USB devices are used on the laptop or the same computer.
The above two situations will cause a file system error, resulting in a garbled directory. Knowing the cause of the problem is easy to solve, you can solve this problem by using the Windows disk scan program. Run the Scandisk command and select Automatic repair error when scanning the USB hard disk. After scanning, you will find that the garbled directory has disappeared, at the same time, some files with the CHK extension are added to the root directory of the USB hard drive. These are the backup files in the garbled directory and can be deleted.
Therefore, when using a USB hard disk, you should pay attention to the following: while the USB hard disk is reading and writing, although the operating system shows that the Read and Write tasks have been completed, however, if the USB hard disk read/write indicator is still on, do not unplug the hard disk. When using a USB hard disk on a computer or laptop with insufficient USB interface power supply, it is best to use the external power cord provided by the USB hard disk along with the disk to power the USB hard disk to increase the voltage and improve the security of data reading and writing on the USB hard disk.
24. Why is the USB mobile hard drive much slower in WINXP than in Win2000?
The biggest possible reason is that SP1 or SP2 is not installed in the WINXP operating system, so the corresponding USB-based driver cannot be loaded. It is composed of the intel855 chipset and wireless network card module. It supports USB2.0. However, in WINXP, patches must be added to use the USB2.0 function of the intel855 chipset. However, WINXP must be activated when patching, therefore, many users cannot experience the version on the pirated WINXP chindejor notebook.

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.