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Windows 7: Cannot format usb flash drive


07 Feb 2010   #1

win7 Home Premium 64 bit
 
 
Cannot format usb flash drive

I have migrated from XP to Win 7 Ultimate recently. I am unable to format 1GB Simple tech USB Flash drive. The formatting process starts as usual, towards the end “Windows cannot format usb flash drive " and everything stops.

Under Properties>general no file system is displayed.

I download " HP USB Disk Storage Format Tool " and when activated it displays "write protected message"

Any help will be greatly appreciated.


My System SpecsSystem Spec
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07 Feb 2010   #2

Microsoft Community Contributor Award Recipient

ME/XP/Vista/Win7
 
 

Disk - Clean and Clean All with Diskpart Command

Open command prompt.

Type in command line

DISKPART
LIST DISK
SELECT DISK # (USB Stick)
CLEAN ALL
CREATE PARTITION PRIMARY
SELECT PARTITION 1
ACTIVE
FORMAT FS=FAT32
ASSIGN
EXIT
EXIT


Attached Images
 
My System SpecsSystem Spec
07 Feb 2010   #3

Windows 7 Ultimate x86 and Ubuntu Linux 9.10
 
 

Another solution is to download "MBRFIX". This is a little DOS utility you can run from a command prompt. It has rescued several USB flash drives for me. I used it to wipe out the partition table on the flash drive. Look at the "clean" command parameters (mbrfix /?). Be absolutely certain you designate the correct drive number for your flash drive or you'll wipe out all partitions on the wrong drive. Usually /drive 0 is your hard drive and /drive 1 is the flash drive. There are other commands to help you determine this on the command help menu (mbrfix /?). Just Google mbrfix to find it... it's a freebie.
My System SpecsSystem Spec
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10 Feb 2010   #4

win7 Home Premium 64 bit
 
 

theog

After selecting pen drive and returns following error.

"DiskPart has encountered an error: Data error (cyclic redundancy check)"

raydabruce

Clean command returns following error.

" Function failed. Error 5: Access is denied.


Do I have any other option ?
My System SpecsSystem Spec
10 Feb 2010   #5
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 

Hell Cimage,

According to your USB flash drive's manual (PDF file), you have a write protect switch that needs to be turned off first. Afterwards, you should be able to format it.

Quote:
Disk write protection switch to protect your files/data from being mistakenly overwritten.
Hope this helps,
Shawn
My System SpecsSystem Spec
11 Feb 2010   #6

win7 Home Premium 64 bit
 
 

Thanks for responding Brink.

The model of pen drive I own doesn't possess write protection switch. i have been using this drive since last couple years without any issue. After upgrading to Windows 7 read function went on without any hitch. Only when I tried to format, towards the end of the process error msg returns “Windows cannot format usb flash drive " and everything stops.
My System SpecsSystem Spec
11 Feb 2010   #7
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 

Cimage,

If you haven't already tried it, see if you can use the Clean All command above using a command prompt at boot using your Windows 7 installation disk instead of from within Windows 7.
My System SpecsSystem Spec
11 Feb 2010   #8

win7 Home Premium 64 bit
 
 

Brink

Unfortunately, I am no geek just a intense PC user. Can you please give me the steps as to how should I go about using command prompt at boot.

Thanks
My System SpecsSystem Spec
11 Feb 2010   #9
Microsoft MVP

64-bit Windows 8.1 Enterprise
 
 

No problem Cimage, here you go.

(OPTION TWO)
Command Prompt at Startup

and then,

Disk - Clean and Clean All with Diskpart Command
My System SpecsSystem Spec
12 Feb 2010   #10

win7 Home Premium 64 bit
 
 

Thanks Brink, I am currently traveling, I will try this on Monday when I get back.

Once again thanks for your help.
My System SpecsSystem Spec
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 Cannot format usb flash drive




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