On Fri, 31 Aug 2001 17:33:51 -0400 [EMAIL PROTECTED] wrote: > In linux.debian.user, you wrote: > > Hello! > > > > Hmm, the subject says almost everything... my almost new (!) IBM hard disk > > suddenly had some bad sectors and one was the superblock of my linux > > partition. So, I cannot boot into linux any more, and if I try to e2fsck > > the partition, e2fsck doesn't find the superblock. Also, if I try with -b > > 8193 or -b 16385, e2fsck says that these blocks contain a "bad magic > > number". Hmm, I've read that these blocks should actually be superblock > > backups but I think since my fs was made with the new default > > "sparse_superblocks" option, the backups are perhaps somewhere else. Can > > anyone please help me with this issue? I just desperately want to rescue > > my data before I send the drive back to IBM or so because they will > > probably send me a new HDD but not my old data, and of course I have not > > made backups, stupid me. The partition is /dev/hda2 and about 7.7 GB. I > > also have a possibility to temporarely store up to 12 GB of data on hda1, > > a fat32 partition which scandisk could obviously "stabilize" more or less > > after a bad block marking. At the moment, I'm trying to dd /dev/hda2 into > > a file on /dev/hda1 but there seems to be a problem with the maximal file > > size on fat partitions (does anyone know about that?). > > > > Regards and thanks in advance, > > > > Stephan > > > > This is from the e2fsck manpage: > > The location of the backup superblock is dependent on the > filesystem's blocksize. For filesystems with 1k blocksizes, a > backup superblock can be found at block 8193; for filesystems > with 2k blocksizes, at block 16384; and for 4k blocksizes, at > block 32768. > > Additional backup superblocks can be determined by using the > mke2fs program using the -n option to print out where the > superblocks were created. The -b option to mke2fs, which > specifies blocksize of the filesystem must be specified in > order for the superblock locations that are printed out to be > accurate.
Yeah, this was exactly what I needed! Now I have the offsets of my superblocks and I'm running e2fsck at the moment. Thanks very much, Stephan
