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?
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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 !
ie0Author Commented:
I haven't tried another computer.
I think I'll try another drive first.
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...

Basically, you'll want to list, select the drive and then clean.  takes about two minutes from a command prompt.
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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 !
ie0Author Commented:
I have not fixed the problem yet.
I will try a new drive to same time.
ie0Author Commented:
A new drive fixed the problem.
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