vfat broken in 2.6.10?

[John Richard Moser]

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I'm using Ubuntu Linux Hoary

root@icebox:~# uname -a
Linux icebox 2.6.10-5-686 #1 Tue Mar 15 15:16:01 UTC 2005 i686 GNU/Linux


root@icebox:~# fsck.vfat -r /dev/sda1
dosfsck 2.10, 22 Sep 2003, FAT32, LFN
/\uffffSCK0000.REN
  Duplicate directory entry.
  First    Size 0 bytes, date 19:03:36 Mar 04 1980
  Second   Size 0 bytes, date 19:00:00 Dec 31 1979
1) Drop first
2) Drop second
3) Rename first
4) Rename second
5) Auto-rename first
6) Auto-rename second
? 5
  Renamed to FSCK0000.REN
Perform changes ? (y/n) y
/dev/sda1: 187 files, 167150/246288 clusters
root@icebox:~# fsck.vfat -r /dev/sda1
dosfsck 2.10, 22 Sep 2003, FAT32, LFN
/dev/sda1: 187 files, 167150/246288 clusters

Now the FS is clean.

root@icebox:~# mount /dev/sda1  /media/usbdisk/
root@icebox:~# vim /media/usbdisk/a.txt
root@icebox:~# rm /media/usbdisk/a.txt

Created, deleted a.txt

root@icebox:~# umount /media/usbdisk/
root@icebox:~# fsck.vfat -r /dev/sda1
dosfsck 2.10, 22 Sep 2003, FAT32, LFN
/\uffff.\000a\000.\000t.\000x\000
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it

Does that say a.txt?

? 1
/\uffffa\000.\000t\000x.\000t\000
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? 1
/\uffff.\000a\000.\000t.\000x\000
  Start cluster beyond limit (7798784 > 246289). Truncating file.
/\uffff.\000a\000.\000t.\000x\000
  File size is 4294967295 bytes, cluster chain length is 0 bytes.
  Truncating file to 0 bytes.
/\uffffa\000.\000t\000x.\000t\000
  Start cluster beyond limit (4294901760 > 246289). Truncating file.
/\uffffa\000.\000t\000x.\000t\000
  File size is 4294967295 bytes, cluster chain length is 0 bytes.
  Truncating file to 0 bytes.
/\uffff.TXT
  Contains a free cluster (167160). Assuming EOF.
/\uffff.TXT
  File size is 5 bytes, cluster chain length is 0 bytes.
  Truncating file to 0 bytes.
Perform changes ? (y/n) y


I didn't pull the disk out at all, or anything.  Just umounted and
remounted and made/removed a file.  Also. . .


/dev/sda1: 189 files, 167150/246288 clusters
root@icebox:~# fsck.vfat -r /dev/sda1
dosfsck 2.10, 22 Sep 2003, FAT32, LFN
/\uffff.\000a\000.\000t.\000x\000
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? 3
  Renamed to FSCK0001.REN
/\uffffa\000.\000t\000x.\000t\000
  Bad file name.
1) Drop file
2) Rename file
3) Auto-rename
4) Keep it
? 3
  Renamed to FSCK0002.REN
Perform changes ? (y/n) y
/dev/sda1: 191 files, 167150/246288 clusters
root@icebox:~# fsck.vfat -r /dev/sda1
dosfsck 2.10, 22 Sep 2003, FAT32, LFN
/dev/sda1: 191 files, 167150/246288 clusters

It appears dosfsck may not be working quite right.  I've taken this into
account, hence the second pass after each fsck.  This is either a
dosfsck issue, a usb-storage issue for the PNY compact flash drive, or
an issue with vfat itself.

So either LKML needs to fix the drivers, or Ubuntu needs to upgrade/fix
dosfsck or some patch they've applied to the kernel.

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