On 2011-05-06, at 6:09 PM, ChrAnton Mitterer <calestyo@xxxxxxxxxxxx> wrote: > Hi. > > Few minutes ago, being too tired, I unfortunately did a mkfs.ext3 on an > already existing ext3 fs (instead of fsck.ext3). > It unfortunately didn't warn me that there's already an fs on it but > started right away with it's evil work[0] until I ^C-ed it[0] in panic. > > I know this list is about devel, but unfortunately I don't know a better > place to ask experts (sorry). > > > When I scan the fs with testdisk it seems to find some superblocks, having > the old fs label: > superblock 32768, blocksize=4096 [data1] > superblock 98304, blocksize=4096 [data1] > superblock 163840, blocksize=4096 [data1] > superblock 229376, blocksize=4096 [data1] > superblock 294912, blocksize=4096 [data1] > superblock 819200, blocksize=4096 [data1] > superblock 884736, blocksize=4096 [data1] > superblock 1605632, blocksize=4096 [data1] > superblock 2654208, blocksize=4096 [data1] > superblock 4096000, blocksize=4096 [data1] > > Could it be that these are still valid ones? > > When I try to mount e.g.: > # mount -t ext3 -o sb=$((32768*4)) There is no backup superblock at this offset. You should use one of the superblock locations given above, and also -B 4096 to set the blocksize. > /dev/sdc1 /mnt/ > mount: wrong fs type, bad option, bad superblock on /dev/sdc1, > missing codepage or helper program, or other error > In some cases useful info is found in syslog - try > dmesg | tail or so > > ...it doesn't work however. > > Any ideas? > > Thanks, > Chris. > > btw: Please CC me as I'm off list. > > > [0]mke2fs 1.41.12 (17-May-2010) > Filesystem label= > OS type: Linux > Block size=4096 (log=2) > Fragment size=4096 (log=2) > Stride=0 blocks, Stripe width=0 blocks > 45793280 inodes, 183143000 blocks > 9157150 blocks (5.00%) reserved for the super user > First data block=0 > Maximum filesystem blocks=4294967296 > 5590 block groups > 32768 blocks per group, 32768 fragments per group > 8192 inodes per group > Superblock backups stored on blocks: > 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, > 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, > 102400000 > > Writing inode tables: ^C00/5590 > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
