error to portable hard disc

April 1, 2011 at 01:44:31
Specs: Windows XP
one drive of my portable hard disc is not accessible , it shows raw file system & if try to convert it to ntfs it shows "already ntsf format"

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April 1, 2011 at 09:23:42
The USB port you plug the external drive into must be able to supply the full USB spec 500ma of current

Troubleshooting USB device problems including for flash drives, external drives, memory cards.
See Response 1:

Check that out first.

Rarely, not all the ports on the back of a desktop case may be able to supply 500ma each.

If you have a desktop computer, Note that I answered a Topic on this site where a guy had an external drive, which does require the full 500ma, connected to a port on the back of a desktop case - it would not work properly when a webcam was in the port next to it, but it worked fine when the webcam was unplugged. Ports on the back of a desktop case often have two ports connected to the same USB controller module that are ports one above the other - you could try connecting the cable to one of those and leaving the other un-used.

If you have not dropped the drive or otherwise damaged it, your problem was probably caused by you NOT clicking on the Safely Remove Hardware icon in your Taskbar and STOPping accessing the drive BEFORE you unplugged the drive while Windows was running.
There are several programs that you could try that will probably fix your problem.

Specifically, links to some programs that can repair the data damage are here -
see response 2:

That post also has info about testing the external enclosure's hard drive. Apparently, the Windows version of Seagate's SeaTools can test any hard drive brand when it's in an external enclosure.
Do the long test.

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