In linux.debian.user, you wrote: > >on Tue, Sep 04, 2001 at 05:03:08PM +0200, Stephan Hachinger >> ([EMAIL PROTECTED]) wrote: >> >> Hello! >> >> >> >> Below you see a copy of the last thread I'm referring to. My HDD and >> >> especially the superblock no.1 is heavily demaged - but I now have >> managed >> >> to e2fsck the partition using the backup superblock number 32768. > Debugfs >> >> /dev/hda2 can also show me the contents of the partition, but "mount -t >> >> ext2 -o sb=32768 /dev/hda2 /mnt" just won't mount it and says "bad > magic >> >> number" etc. Can anyone please tell me what I'm missing? Does mount >> >> calculate the superblock offset in another way or should I give up > or??? >> I >> >> need this data desperately as I mentioned. If anyone can help me, > thanks >> >> thousand times in advance. >> > >> >Can't help you on disk forensics, but I *strongly* recommend you image >> >the disk to known good media before you tweak with it. Your debug tools >> >should work on the disk image equally as with the physical disk, with >> >the added bonus that it's not likely to go bad (or worse). >> >> Hmm, if I'd only have a HDD to save the data, I would be happy :) ; then I >> could probably do dd if=/dev/hda2 of=/dev/xyz and e2fsck - >> b 32768 /dev/xyz, e2fsck would restore the first superblock and my > problems >> were gone... but I have no second hard disk which is that big :(. >> >> Cheers and thanks anyway, >> >> Stephan > > OK, just wanted to tell you the solution - while the block number which must > be given to mount is based on the blocksize which is installed on the hard > disk (4k in my case), the block number which must be given to mount is > calculated on a 1k-block-basis, so I had to multiply 32768*4. > > Cheers, > > Stephan
Gee, I thought after you ran e2fsck with a backup superblock you would just be able to mount it as usual with 'mount -t ext2 /dev/hda2 /mnt' I didn't realize you would have to give it a backup superblock on the mount command. I thought the old superblock would be updated. Where can I find out more about what e2fsck does when you use the backup superblock? Thanks Anita
