USB flash write protect
Peter
plp-ysDPMY98cNQDDBjDh4tngg at public.gmane.org
Fri Apr 8 16:03:42 UTC 2005
On Fri, 8 Apr 2005, Jason Shein wrote:
> I have 2 USB memory sticks that belong to a client that have a strange
> problem.
I have been warned by merchants not to format certain usb keys because
things like you describe are known to happen. I do not know about your
make.
My theory: the flash memory inside has some protection registers which
can be set to enable write protection. When you format the drive you set
a combination of write protect bits that cannot be erased using known
means. Apparently the manufacturer-supplied software can recover some
such drives but I am not sure about which make and I have no direct
experience with it. The merchant's warning is clear, though. I have had
no problems with no-name drives.
hope this helps,
Peter
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