How to restore backup superblock----------------------------------[root@localhost ~]# dumpe2fs /dev/mapper/vg0001-lv1 |grep -i backdumpe2fs 1.41.12 (17-May-2010)Journal backup: inode blocks Backup superblock at 8193, Group descriptors at 8194-8194 Backup superblock at 24577, Group descriptors at 24578-24578 Backup superblock at 40961, Group descriptors at 40962-40962 Backup superblock at 57345, Group descriptors at 57346-57346 Backup superblock at 73729, Group descriptors at 73730-73730[root@localhost ~]# e2fsck -f -b 8193 /dev/mapper/vg0001-lv1e2fsck 1.41.12 (17-May-2010)Pass 1: Checking inodes, blocks, and sizesPass 2: Checking directory structurePass 3: Checking directory connectivityPass 4: Checking reference countsPass 5: Checking group summary information/dev/mapper/vg0001-lv1: ***** FILE SYSTEM WAS MODIFIED *****/dev/mapper/vg0001-lv1: 11/25688 files (9.1% non-contiguous), 8896/102400 blocks[root@localhost ~]# mount /dev/mapper/vg0001-lv1 /d01[root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root 12G 9.4G 1.6G 87% /tmpfs 1004M 0 1004M 0% /dev/shm/dev/sda1 485M 54M 407M 12% /boot/dev/mapper/vg0001-lv1 97M 5.6M 87M 7% /d01[root@localhost ~]#