Comment 12 for bug 88147

Revision history for this message
Auke Latour (auke-public) wrote : Re: Kubuntu Edgy: Can't write to USB stick

I performed a test with a new USB stick. Surprisingly that USB stick showed no problems, so I tried to find a difference.

I discovered that the type of FAT differs. I hope this is useful information.

Non functioning USB stick:
-------------------------
auke@desktop:~$ fdisk /dev/sdb

Command (m for help): p

Disk /dev/sdb: 122 MB, 122814464 bytes
128 heads, 2 sectors/track, 937 cylinders
Units = cylinders of 256 * 512 = 131072 bytes

   Device Boot Start End Blocks Id System
/dev/sdb1 * 1 937 119935 6 FAT16

Functioning USB stick:
-------------------------
auke@desktop:~$ fdisk /dev/sdg

The number of cylinders for this disk is set to 7872.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)

Command (m for help): p

Disk /dev/sdg: 2063 MB, 2063597568 bytes
16 heads, 32 sectors/track, 7872 cylinders
Units = cylinders of 512 * 512 = 262144 bytes

   Device Boot Start End Blocks Id System
/dev/sdg1 1 7872 2015216 e W95 FAT16 (LBA)