意外断电, 磁盘报错, 提示超级块有问题,如何修复?

xieliangcheng

意外断电, 导致磁盘阵列及服务器均停机了, 开机后SUN服务器提示有一磁盘有问题.
本想用fsck进行修复, 但提示有错, 该磁盘上阵列上的, 约有557G.   请教谁有这方面的经验,指导一下.


root@library # format
Searching for disks...done


AVAILABLE DISK SELECTIONS:
....
       6. c5t6d0 <TOYOU-NetStorDA9220F-342R cyl 36148 alt 2 hd 255 sec 127>
          /pci@8,700000/fibre-channel@3/sd@6,0
       7. c5t7d0 <TOYOU-NetStorDA9220F-342R cyl 36151 alt 2 hd 255 sec 127>
          /pci@8,700000/fibre-channel@3/sd@7,0
....



partition> p
Current partition table (original):
Total disk cylinders available: 36148 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders         Size            Blocks
  0       root    wm       0 -     8      142.32MB    (9/0/0)         291465
  1       swap    wu       9 -    17      142.32MB    (9/0/0)         291465
  2     backup    wu       0 - 36147      558.21GB    (36148/0/0) 1170652980
  3 unassigned    wm       0                0         (0/0/0)              0
  4 unassigned    wm       0                0         (0/0/0)              0
  5 unassigned    wm       0                0         (0/0/0)              0
  6        usr    wm      18 - 36147      557.93GB    (36130/0/0) 1170070050
  7 unassigned    wm       0                0         (0/0/0)              0




root@library # newfs -N /dev/rdsk/c5t6d0s6
Minimum bytes per inode is 11992
With 32385 sectors per cylinder, minimum cylinders per group is 16
This requires the fragment size to be changed from 1024 to 8192
Please re-run mkfs with corrected parameters



root@library # fsck /dev/rdsk/c5t6d0s6 -y
** /dev/rdsk/c5t6d0s6
BAD SUPERBLOCK AT BLOCK 16: MAGIC NUMBER WRONG

LOOK FOR ALTERNATE SUPERBLOCKS WITH MKFS?


LOOK FOR ALTERNATE SUPERBLOCKS WITH NEWFS?

SEARCH FOR ALTERNATE SUPERBLOCKS FAILED.

USE GENERIC SUPERBLOCK FROM MKFS?


USE GENERIC SUPERBLOCK FROM NEWFS?

SEARCH FOR ALTERNATE SUPERBLOCKS FAILED. YOU MUST USE THE -o b OPTION
TO FSCK TO SPECIFY THE LOCATION OF A VALID ALTERNATE SUPERBLOCK TO
SUPPLY NEEDED INFORMATION; SEE fsck(1M).
fsck: operation not applicable to FSType nfs





root@library # fsck -y /dev/rdsk/c5t6d0s6
** /dev/rdsk/c5t6d0s6
BAD SUPERBLOCK AT BLOCK 16: MAGIC NUMBER WRONG

LOOK FOR ALTERNATE SUPERBLOCKS WITH MKFS?  yes


LOOK FOR ALTERNATE SUPERBLOCKS WITH NEWFS?  yes

calcsb: short read of superblock from newfs
SEARCH FOR ALTERNATE SUPERBLOCKS FAILED.

USE GENERIC SUPERBLOCK FROM MKFS?  yes

CALCULATED GENERIC SUPERBLOCK WITH MKFS
If filesystem was created with manually-specified geometry, using
auto-discovered superblock may result in irrecoverable damage to
filesystem and user data.

CANCEL FILESYSTEM CHECK?  yes

Please verify that the indicated block contains a proper
superblock for the filesystem (see fsdb(1M)).

FSCK was running in YES mode.  If you wish to run in that mode using
the alternate superblock, run `fsck -y -o b=1170063840 /dev/rdsk/c5t6d0s6'.


root@library # fsck -y -o b=1170063840 /dev/rdsk/c5t6d0s6
Alternate super block location: 1170063840.
** /dev/rdsk/c5t6d0s6
BAD SUPERBLOCK AT BLOCK 1170063840: MAGIC NUMBER WRONG
root@library #

peterwang_60

Try this
newfs -N -T /dev/rdsk/c5t6d0s6
Then from output, pick alternateive superblock number with fsck.

xieliangcheng

这个我已经试过了.   不行.    只怕没得救了. 数据应是丢失了.

root@library # newfs -N -T /dev/rdsk/c5t6d0s6
Warning: cylinder groups must have a multiple of 16 cylinders with the given
         parameters
Rounded cgsize up to 32
Warning: insufficient space in super block for
rotational layout tables with nsect 127, ntrack 255, and nrpos 8.
Omitting tables - file system performance may be impaired.
Warning: 2 sector(s) in last cylinder unallocated
/dev/rdsk/c5t6d0s6:     1170070048 sectors in 36130 cylinders of 255 tracks, 127 sectors
        571323.2MB in 2259 cyl groups (16 c/g, 253.01MB/g, 256 i/g)
super-block backups (for fsck -F ufs -o b=#) at:
32, 518320, 1036608, 1554896, 2073184, 2591472, 3109760, 3628048, 4146336,
4664624,
Initializing cylinder groups:
............................................
super-block backups for last 10 cylinder groups at:
1165367600, 1165885888, 1166404176, 1166922464, 1167440752, 1167959040,
1168477328, 1168995616, 1169513904, 1170032192,


root@library # fsck -F ufs -o b=32 /dev/rdsk/c5t6d0s6
Alternate super block location: 32.
** /dev/rdsk/c5t6d0s6
BAD SUPERBLOCK AT BLOCK 32: MAGIC NUMBER WRONG


root@library # fsck -F ufs -o b=1165367600 /dev/rdsk/c5t6d0s6
Alternate super block location: 1165367600.
** /dev/rdsk/c5t6d0s6
BAD SUPERBLOCK AT BLOCK 1165367600: MAGIC NUMBER WRONG
root@library #

root@library # fsck -F ufs -o b=518320 /dev/rdsk/c5t6d0s6
Alternate super block location: 518320.
** /dev/rdsk/c5t6d0s6
BAD SUPERBLOCK AT BLOCK 518320: MAGIC NUMBER WRONG
root@library #


root@library # fsck -F ufs -o b=1170032192 /dev/rdsk/c5t6d0s6
Alternate super block location: 1170032192.
** /dev/rdsk/c5t6d0s6
BAD SUPERBLOCK AT BLOCK 1170032192: MAGIC NUMBER WRONG

oasvr

os版本？ 试试找新一点的安装光盘单用户启动再运行fsck

znnnz

先iostat -En看hard error，多的话直接换掉。