RSS 2.0Corrupted USB flash key recovery
There are only two kinds of people in the world, those who have lost data and those who are about to. — Anon
The 128Mb Swisskey belongs to a friend and contained the only edited copy of a manuscript she has been working on. She had forgotten to "trash can" or eject it before removing it from her Mac and could no longer read anything from the key. It's doubtful whether the act of removing the key caused the corruption but there does seem to be a link.
The first thing I tried was reading the raw key image.
# dd if=/dev/sda of=key.img 500+0 records in 500+0 records out 131072000 bytes (131 MB) copied, 132.2937 s, 1.0 MB/s #
I repeated this step to create another image file and then compared their md5 signatures to make sure the key wasn't corrupting the data itself. The next thing I did was try to mount the image.
# mount -o loop -t vfat key.img /mnt/usb
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
#
posted by James Gemmell on Thu, 15 Mar 2007 at 10:31 | permalink
