I have not one but two flash drives that were previously working fine until I installed chrome os on them. After doing so, the drives act as if they are write protected in windows. They cannot be formatted.
I boot up a Ubuntu live cd and used gparted to format and create a new fat32 volume. Within Ubuntu the volume is usable and I can write files to it. In windows the volume is visible but I cannot write to it. I am also still unable to format the volume. This is also repeatable on another computer so i'ts not a problem with my computer.
Here are my results from different attempts to format the drive.
Diskpart clean command gives me Diskpart has encountered an error. Incorrect function.
Diskpart format gives me Diskpart has encountered an error. The parameter is incorrect.
Diskpart Detail Disk shows that the read only flag is not set. I have run attributes disk clear readonly anyway with no change.
If I try to format from Disk Manager I get the message "The operation did not complete because the media is write-protected.
mUSBfixer instantly tells me that the volume was successfully formatted but it isn't.
HP USB disk storage format tool says "Device media is write-protected."
I have tried creating the WriteProtect registry key under "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies" and setting it to 0 to no effect.
There is no write protect switch on the drives themselves.
If this were just one drive I would just assume the drive is bad and not worry about it. But two drives at the same time that both happened to have chrome os installed on them suggests otherwise.