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external hard disk

By rider_6656 ·
hi fiends,
external hard disk is not detected in my system , but its working in another system....dont know y ? any one pls answer for that ...

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A couple of things to try

by Jacky Howe In reply to external hard disk

Connect the drive to the System that will read it.

With the external drive attached press the WinKey + Pause/Break and click the System Restore tab. Stop monitoring the drive and the system volume information directory should be removed. Problems can arise if the drive is connected to another System and both are monitoring the drive.


1. Click Start, point to All Programs, point to Accessories, and then click Command Prompt.
2. At a command prompt, type the following command, and then press ENTER:
set devmgr_show_nonpresent_devices=1
3. Type the following command at the command prompt, and then press ENTER:
start devmgmt.msc
4. Troubleshoot the devices and drivers in Device Manager.

NOTE: Click Show hidden devices on the View menu in Device Managers before you can see devices that are not connected to the computer.
5. When you finish troubleshooting, close Device Manager.
6. Type exit at the command prompt.

Phantom Devices are icons that appear translucent or faded.

Delete all of the Phantom devices that are not connected to the computer. Check under Portable Devices and Universal Serial Bus controlers. Also uninstall the device if it is listed in under Portable Devices. Remove Unknown device as well.
Under Universal Serial Bus controlers remove all USB Universal Host Controlers.
Do the same under Storage Volumes leaving the exposed Generic volume. Restart the System and see if it is detected.


If it is now detected but it is not allocated a Drive letter try this.

Write down all fixed Disk and CD/DVD drive letters so as not to delete them. DO NOT delete any of the fixed hard disk drives or CD/DVD optical drives registry values.

1. Login with Administrative privileges.

2. Disconnect all USB or FireWire storage devices.

3. Open Registry Editor by typing regedt32 in the Run box and navigate to the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices. Right click on MountedDevices and select Export. Save this file as you may need it in case something goes wrong. Save it as Devices.reg, it should default to My Documents.

4. Under HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices there will be registry keys with the name that resembles the format of \DosDevice\X: where X can be any alphabet letter which corresponding to your physical system drive letter.

5. Delete all possible USB drives, FireWire drives and external drives which have a drive letter.

<b>DO NOT delete any of the fixed Hard Disk Drives or CD/DVD optical drives registry values.</b>

Exclude \DosDevice\A: which normally reserved for floppy disk drives.


Try a Powerd USB Hub.

Your (PSU) Power supply Unit may not be providing the correct voltages. Maybe your USB ports are starting to fail.

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btw

by Jacky Howe In reply to A couple of things to try

I'm not a fiend.

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No - but you might be an 'IF-END' :^0 < nt >

by OldER Mycroft In reply to btw
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Is that a nested

by Jacky Howe In reply to No - but you might be an ...

statement?

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Update

by Jacky Howe In reply to A couple of things to try

To create a new registry entry that will disable the Selective Suspend feature of the USB hub driver, follow these steps:
Click Start, click Run, type regedit, and then click OK.
Locate and then click the following key in the registry: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\USB
On the Edit menu, point to New, and then click DWORD.
Type DisableSelectiveSuspend, and then press ENTER.
On the Edit menu, click Modify.
Type 1, and then click OK.
Note This setting affects all USB host controller drivers in the system.

If the value of the DisableSelectiveSuspend registry entry is set to 1, the Selective Suspend feature is disabled. Additionally, the Allow the computer to turn off this device to save power check box does not appear on the Power Management tab for the USB Root Hub.

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