Seems like HDD failure. Try to read this disk in another computer. If superblock is damaged -- you may try to recover form backup superblock (e2fsck -b).
21/10/2013 05:52 -0700, Henrique C. S. Junior wrote: > After a power failure in my building, my SL 6.4 (x86_64) is > experiencing a kernel panic in the first stages of booting. > Error messages suggests that a serious problem occurred with my Ext4 > filesystem in /dev/mapper/VolGroup-lv_root. > Here are the error messages aftes the kernel panic: > > ata3.00: status: { DRDY ERR } > ata3.00: error: { UNC } > ata3.00: exception Emask 0xoSAct 0x0 SErr 0x0 action 0x0 > ata3.00: BMDMA stat 0x25 > ata3.00: failed command: READ DMA > ata3.00: cmd c8/00:00:c0:86:14/00:00:00:00:00/e3 tag 0 dm 131072 in > res 51/40:cf:e8:86:14/00:00:00:00:00/e3 Emask 0x9 (media > error) > > ata3.00: status: { DRDY ERR } > ata3.00: error: { UNC } > JBD: Failed to read block at offset 6886 > EXT4-fs (dm-0): error loading journal > mount: wrong fs type, bad option, bad superblock > on /dev/mapper/VolGroup-lv_root, > missing codepage or helper program, or other error > In some cases useful info is found in syslog - try > dmesg | tail or so > > Rescue disk says that I "don't have any Linux partitions" and I need > to rescue, at least, two MySQL databases in this server. > Can someone, please, provide some help with this case? > > --- > Henrique C. S. Junior > http://about.me/henriquejunior > QuĂmica Industrial - UFRRJ > Prefeitura Muncipal de Paracambi > Centro de Processamento de Dados >