USB Hard Drive becomes Read-only randomly

I have a Windows 2008 server with an External USB hard drive that I use with the Windows backup.
Periodically the backup fails and I repower the USB drive and it goes to Read-Only in Disk Management.

How can I get it back to normal read/write and stop it from happening again?
ie0Asked:
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SysExpertConnect With a Mentor Commented:
It could be the hard drive or interface,or win 2008 somehow.

have you tested on a different computer to see if the issue is the drive or your Windows machine ?

I hope this helps !
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ie0Author Commented:
I haven't tried another computer.
I think I'll try another drive first.
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snafumasterDirector of Information TechnologyCommented:
If you're willing to start from scratch, I'd use DiskPart and clean the drive and reformat.  i had one recently that I would switch back and forth from PC to Mac and it got borked.  It's been fine since.

here are the commands...
http://technet.microsoft.com/en-us/library/cc766465(WS.10).aspx

Basically, you'll want to list, select the drive and then clean.  takes about two minutes from a command prompt.
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nobusCommented:
it can be :  a bad disk, a bad usb bridge, a bad cable - or the PC causing this.
if you test with another drive in the same external case, you cna eliminate the disk
try also another cable; then test on another pc !
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ie0Author Commented:
I have not fixed the problem yet.
I will try a new drive to same time.
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ie0Author Commented:
A new drive fixed the problem.
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