Guozhonghua
2014-Oct-09 09:23 UTC
[Ocfs2-users] Hi, is there any way to restore the corrupted disk? Thanks.
Hi, All As we test the OCFS2, the disk is corrupted with dd command manually and so some meta data is lost. We restore the data, there is about 1M meta data can't restored. How can we restore the data from disk? So from 00100000 to 00207000, the meta data is lost. Is anywhere on the disk backup this meta data? Thanks fsck.ocfs2 -r 6 /dev/sdd fsck.ocfs2 1.6.3 [RECOVER_BACKUP_SUPERBLOCK] Recover superblock information from backup block#268435456? <n> y fsck.ocfs2: Bad magic number in inode while initializing the DLM fsck.ocfs2 -fpy /dev/sdd fsck.ocfs2 1.6.3 fsck.ocfs2: Bad magic number in inode while initializing the DLM 00002180 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00200000 00 00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 |..... at ..........| 00200010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00207000 49 4e 4f 44 45 30 31 00 f7 50 ac 08 ff ff 07 00 |INODE01..P......| The disk layout is as below: root at H3CRDS14-RD:~# hexdump -C /dev/sdd |more 00000000 02 02 02 02 02 02 02 02 74 68 69 73 20 69 73 20 |........this is | 00000010 61 6e 20 6f 63 66 73 32 20 76 6f 6c 75 6d 65 00 |an ocfs2 volume.| 00000020 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 |................| * 00000080 02 02 02 02 02 02 02 02 74 68 69 73 20 69 73 20 |........this is | 00000090 61 6e 20 6f 63 66 73 32 20 76 6f 6c 75 6d 65 00 |an ocfs2 volume.| 000000a0 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 |................| * 00000230 74 68 69 73 20 69 73 20 61 6e 20 6f 63 66 73 32 |this is an ocfs2| 00000240 20 76 6f 6c 75 6d 65 00 02 02 02 02 02 02 02 02 | volume.........| 00000250 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 |................| * 00000280 02 02 02 02 74 68 69 73 20 69 73 20 61 6e 20 6f |....this is an o| 00000290 63 66 73 32 20 76 6f 6c 75 6d 65 00 02 02 02 02 |cfs2 volume.....| 000002a0 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 |................| * 00002000 4f 43 46 53 56 32 00 00 f7 50 ac 08 ff ff ff ff |OCFSV2...P......| 00002010 00 00 00 00 00 00 30 00 00 00 00 00 00 00 00 00 |......0.........| 00002020 00 00 00 00 00 00 00 00 00 00 00 00 31 00 00 00 |............1...| 00002030 00 00 00 00 00 00 00 00 ad 60 38 51 00 00 00 00 |.........`8Q....| 00002040 ad 60 38 51 00 00 00 00 00 00 00 00 00 00 00 00 |.`8Q............| 00002050 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00002060 f7 50 ac 08 00 00 00 00 00 00 00 00 00 00 00 00 |.P..............| 00002070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000020c0 00 00 5a 00 00 00 14 00 00 00 00 00 00 00 00 00 |..Z.............| 000020d0 ad 60 38 51 00 00 00 00 00 00 00 00 03 00 00 00 |.`8Q............| 000020e0 50 12 00 00 01 00 00 00 01 02 00 00 00 00 00 00 |P...............| 000020f0 02 02 00 00 00 00 00 00 0c 00 00 00 14 00 00 00 |................| 00002100 20 00 00 00 9e 53 a1 c8 00 01 00 00 00 00 00 00 | ....S..........| 00002110 74 61 72 67 65 74 31 30 31 00 00 00 00 00 00 00 |target101.......| 00002120 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00002150 03 5b a0 58 db fc 4e a7 81 c1 31 4a f5 ae 3c a3 |.[.X..N...1J..<.| 00002160 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00002170 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 |................| 00002180 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00200000 00 00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 |..... at ..........| 00200010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00207000 49 4e 4f 44 45 30 31 00 f7 50 ac 08 ff ff 07 00 |INODE01..P......| 00207010 00 00 00 00 00 00 30 00 00 00 00 00 00 00 00 00 |......0.........| 00207020 00 00 00 00 00 03 00 00 a4 81 01 00 91 04 00 00 |................| 00207030 ad 60 38 51 00 00 00 00 ad 60 38 51 00 00 00 00 |.`8Q.....`8Q....| 00207040 ad 60 38 51 00 00 00 00 00 00 00 00 00 00 00 00 |.`8Q............| 00207050 07 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00207060 f7 50 ac 08 00 00 00 00 00 00 00 00 00 00 00 00 |.P..............| 00207070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * ------------------------------------------------------------------------------------------------------------------------------------- ???????????????????????????????????????? ???????????????????????????????????????? ???????????????????????????????????????? ??? This e-mail and its attachments contain confidential information from H3C, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!