"Can't read superblock" booting 2.4.anything"

["John Andersen" <john@bridgenet.cc>]

For some reason, any 2.4 kernel I try and boot (I've compiled two from
Benh's tree, and got 1 deb from walters and 1 deb from Jonas) I get the same
error:

it tells me it can't read the superblock, make sure I have a valid partion,
etc and throughs me into single user mode.  If I try and fsck it tells me
the file or directory doesn't exist, yet I can mount it and see everything.
e.g.:

mount -n -o remount,rw /      #works fine
e2fsck /dev/hda11                #"bad superblock, etc try e2fsck -b 8193
<device>
e2fsck -b 8193 /dev/hda11  #tells me "no such file or directory while trying
to open /dev/hda11" superblock cound not be read, blah blah
mac-fdisk /dev/hda              # also tells me "no such file or directory"

  Booting stock 2.2r3 kernel 2.2.19 works fine.

I'm on a Titanium PowerBook, triple booting MacOS 9.1, MacOS X, and
DebianPPC.  /dev/hda11 is my root partition.

Anyone no what my problem is?