I don't have RAID, but I got the error
"invalid argument passed to ext2 library while setting up superblock"
when running mkfs on the 3rd partition created on a 13 Gig disk.
This was using RH 6.0. It seemed to be using the ext2 tools 1.14.
I went to the home web site http://web.mit.edu/tytso/www/linux/e2fsprogs.html
and found that this was the latest version. I thought I'd run gdb on it
to see what was happening. So I got the tar file and compiled it. When
I ran mke2fs it worked: no error!
So either mkfs does some mistaken checking before running mke2fs,
or there are different versions of 1.14 around (or ???). This may or
may not relate to the RAID problem, but you might like to get the
latest version.
Bob
P.S. I looked around the Red Hat site for a e-mail address to add as
a cc, but didn't find one! I should have stuck to debian.
