How do I check for bad superblocks and fix them on a USB device in Ubuntu 10.04

Question

I've found some instructions for this, but it seems the fsck options are outdated. Currently I am trying:

mke2fs -n /dev/sdc4  

then using the blocks listed in this:

fsck -y -b 163840 /dev/sdc4  

Actually, as I look at the fsck help, it would seem it should work, but when I run it, I get

invalid option -- b

why isnt this working?

Answer 1

Try e2fsck -y -b 163840 /dev/sdc4.

fsck is just a wrapper to the appropriate checker program for the filesystem. On my 10.04 box fsck does not take a -b option, but e2fsck does.