Have you tried switching to a different HDD cable and/or drive? [You have of course fsck'ed the filesystem...] Although if you're getting the same error every time... Weird... Cheers, MaZe. > Already done : > memtest86+ [not memtest86] for 11.5 hours > Mersenne prime test for almost 3 hours [I think that's what you mean > by mprime] > >> The error is: > >> Kernel: Assertion failure in __journal_file_buffer at > >> fs/jbd/transaction.c 1947: "jbd_is_locked_bb_state(bh)"