I ordered a bunch of 1GB usb drives from a. Most of them work just fine, but a couple of them won't let me format them because they are 'write-protected.' There is no write protection switch on the device.

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I have exhaustively tried the following: • Windows format: 'The disk is write protected' • HP USB Disk Storage Format Tool: 'Device media is write-protected' • Changing registry key HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Control StorageDevicePolicies to 0 • diskpart clear attributes readonly • diskpart clean: 'Diskpart has encountered an error: The request could not be performed because of an I/O device error. See the System Event Log for more information.' (The System Event Log only contains the error: The IO operation at logical block address 0 for Disk 1 was retried.) •: 'Format Error occurred at offset 985,595,904: 1117 - Device I/O error' and hundreds of similar errors • Sacrificing a lamb to the USB gods • Starting in safe mode with command prompt and running format, diskpart, and chkdsk So do all these I/O device errors mean that these USB drives are just totally screwed?

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Is there any way to get more information about the problem? One more important thing: Do not use those defective sticks anymore! You might be tempted to partition the stick to use the intact area (not sure whether that would make much sense on a 1GB stick anyway), but the wear-leveling of the flash controller will, over time and depending on write cycles, try to utilize all flash memory cells to spread wear evenly over the whole flash.

You will have no control over which Flash cells are written, no matter how you might partition the stick. (If the stick would be the cheapest of the fakes without any wear leveling, then this would be even worse.) – Dec 17 '13 at 7:16 •. My answer to this question is similar to the answer I had given for this question To summarize You can try using Mass Production tools to reprogram the microcontroller in your USB Flash Drive. However this procedure varies for all USB Flash Drives. Most Mass Production tools are used to repair USB Flash Drives or to add or remove CDFS Partition; Some of these MP Tools can also be used to add/remove write protection. The general procedure to reprogram your USB Flash Drive to add/remove write protection is as follows: Download and Run Chipgenius and find out the VID and PID of your USB Drive.

Go to and enter the VID and PID of your USB Drive.Check if there are any MassProduction tools available and download them. Then you will have to figure how to use it. Check this for detailed guide on how to do this.(In this guide the MPtool is being used to repair a fake USB Drive) Warning - The procedure varies for different USB Flash Drives and you may end up with irreparable USB Flash Drive. Note: I have successfully used MPTools on Transcend Jetflash USB Drives for various purposes such as flipping the removable bit or adding a cdfs partition.

The MPtool for JetFlash USB Drives is called AlcorMptool and this MpTool has the option to flip the removable bit. Another reason why I feel comfortable to use JetFlash USB Drives is because it can be fixed easily if something goes wrong.

If the problem is persistent with the drive and you still can't copy files to it or format it after:- • You tried removing read-only permission from the drive properties • You tried formatting from Windows • You tried formatting from CMD using DISKPART • You tried editing the Registry solution (for WriteProtect word) • You tried the different free online tools like HDD LL Format tool and HP Format Tool Then your drive is corrupt and needs the internal chipset S/W to be flashed, i.e. Repairing the USB software. The steps below will lead you to get a small program to run on your USB memory-stick which is specific to your MANUFACTURER (make) and PRODUCT (model). If you don't want to go through the headache of the manufacturer's technical support then do it yourself as follows:- • Get application which you will use to find the VID and PID of the USB stick chip. • Search for the tool to repair your USB stick S/W from. Search using your VID and PID from the previous step. • Search on Google for the name of the application you find in the 'UTILS' column in the page from step 2 and the first link on Google Results (usually) will take you back to the FlashBoot website to download the utility to get your USB drive repaired.