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What is the lowest level in which I can format my flash drive?


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#1 09009494

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Posted 18 December 2016 - 06:59 AM

I can't format my USB flash drive, on windows it says "the disk is write protected".
I tried everything (partition magic, CMD commands, terminal commands, GParted, deleting the files without format, deleting its partition) nothing works.
However the data on it is perfectly fine and readable.



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#2 shadow_647

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Posted 18 December 2016 - 08:07 AM

So don't use windows to format.......



#3 09009494

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Posted 18 December 2016 - 09:06 AM

So don't use windows to format.......

yo I said "I tried everything (partition magic, CMD commands, terminal commands, GParted, deleting the files without format, deleting its partition) nothing works"



#4 Mike_Walsh

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Posted 18 December 2016 - 10:06 AM

Shadow_647 is right in a way. You need, I think, to use the 'dd' command (also known as 'disk destroyer', if not used carefully!) in a Linux terminal in order to completely get rid of the 'write-protection'. There are also several other low-level Linux utilities (mostly command-line, therefore operated via the Linux 'terminal'), which can help with this; it's not as uncommon as you might imagine.

 

What most often occurs is that the drive, over time, accumulates a large number of bad sectors.....and the drive controller chip drops into *programming/diagnostic* mode in an attempt to protect itself, and exert some sort of 'damage control' over the situation.

 

The most relevant article I've been able to find on this whole business can be found here:-

 

http://askubuntu.com/questions/101637/usb-turn-write-protection-off

 

Hope that helps. Let us know how you get on, please. 

 

 

Mike.  :wink:


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#5 JohnC_21

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Posted 18 December 2016 - 11:01 AM

This can occur if the flash drive has a fake capacity in firmware and you try writing past it's normal capacity. Also some branded flash drives such as the Sandisk will change to write protected if a fault is detected. Nothing will format the drive.

 

There is a thread about this on BC on this problem. I will post the link when I find it.

 

Here is the post by animal Platypus. Time to go back to sleep.


Edited by JohnC_21, 18 December 2016 - 11:05 AM.





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