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I have an Archos 605 media player that seems to have become corrupted, so I'm trying to run fsck on it. It mounts as a FAT32 hard drive, so I ran

sudo dosfsck -a

and this is what I got:

dosfsck 3.0.7, 24 Dec 2009, FAT32, LFN There are differences between boot sector and its backup. Differences: (offset:original/backup) 65:03/00
Not automatically fixing this. Unable to create unique name

I suspect this means I'm screwed, but I'd appreciate any additional insight from someone who knows more about dosfsck than I do.

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up vote 4 down vote accepted

it sounds like the partition table is screwed up.

Fortunately there is a good linux tool to get it back working

sudo apt-get install testdisk

the wiki contains a good guide for exactly your problem (recover fat32 partition)

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Another solution I use:

fsck.vfat -r /dev/sdXn

I asked for use partition table backup (yes) and fix some clusters issue (I select no).

After that I rerun and fix Free cluster summary wrong. Next I run:

sudo dosfsck -w -l -a -v  /dev/sdXn

and it report that all ok!

See blog

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