Thanks for your quick response. The error message is "ioctl: LOOP_SET_FD: Invalid argument". Please find below a short way for reproducing the error. Please note that this error only occurs if Ubuntu is running from the Live CD, and that is not limited to cramfs alone, but seems to be a more general issue with loop-mounting on the Live CD.
# create some test data [EMAIL PROTECTED]:~$ mkdir test [EMAIL PROTECTED]:~$ touch test/testfile # make a cramfs image [EMAIL PROTECTED]:~$ mkfs.cramfs test/ test.cram warning: gids truncated to 8 bits. (This may be a security concern.) # try to loop-mount the cramfs image [EMAIL PROTECTED]:~$ sudo mkdir /media/cram [EMAIL PROTECTED]:~$ sudo mount test.cram /media/cram/ -o loop ioctl: LOOP_SET_FD: Invalid argument -- Loop-mount doesn't work on Live CD (Casper) https://launchpad.net/bugs/59779 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs