Re: USB Flash write proctected!


"Paul" <nospam@xxxxxxxxxx> wrote in message news:gck4p2$u53$1@xxxxxxxxxxx
Susan wrote:
Hi,

I am using Microsof Windows XP SP2. When I connect my flash 1GB
Transcand, it says write protected. So, I can not paste, delete or
format.

I have tried to format if from Disk Management and from command prompt
but it still doesnot work. I have no idea about it.

Anyone, could you please help me with this?

I look forward to hearing from you.

Thanks in advance.


Yours sincerely,


Susan

See "USB drive appears to be write protected"

http://www.uwe-sieber.de/usbtrouble_e.html


Helpful though that site is, the info on the life limitation of FLASH memory
is not entirely accurate (and I don't blame the author as this information
is not exactly given a high profile by the manufacturers). It is only the
housekeeping part of the FLASH memory that has a life of 100,000 erase/write
cycles. The memory cells that actually store the data have no such claim
and have a much shorter life. In general this shouldn't pose a problem
because the actual data memory is written much less frequently than the
housekeeping block (which is erased and written for *every* change to the
stored data). As the ewe-sieber site, states once the data blocks have
ceased to function properly, the memory can become read only. It can also
fail to function completely with a range of symptoms. The life of the data
block can be less or more than the average life with some extreme examples
of FLASH memory chips failing after a relatively few write cycles.

Since you have eliminated a write protect switch and a write protect
registry entry, it seems most likely that your USB stick has failed.


.

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