OBSD 4.0, the disk is an IDE disk taken from a long-ago Linux computer put into a IDE-to-USB disk enclosure.
[EMAIL PROTECTED]:~$ fsck.ext2 /dev/sd0j [...] /dev/sd0j: 503728/7208960 files (3.3% non-contiguous), 9188731/14390223 blocks umass0: Invalid CSW: tag 904086 should be 904087 sd0: WARNING: cache synchronization failed Segmentation fault (core dumped) gdb `which fsck.ext2` fsck.ext2.core (gdb) bt full #0 0x1c00173f in ??() No symbol table info available. #1 0x00000000 in ??() No symbol table info available. CL<