我在Ubuntu
Linux 10.04 LTS上有一个4x1TB硬盘的RAID-5阵列和一个lvm2分区.其中一个磁盘发生故障.我已经重新组装了没有这个故障磁盘的阵列,但现在mdadm –examine声称该阵列没有超级块,fdisk说它没有分区表.我该怎么做才能恢复数据？
# mdadm -D /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sat Mar 5 14:43:49 2011
Raid Level : raid5
Array Size : 2930276352 (2794.53 GiB 3000.60 GB)
Used Dev Size : 976758784 (931.51 GiB 1000.20 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Sat Mar 5 15:06:49 2011
State : clean,degraded
Active Devices : 3
Working Devices : 3
Failed Devices : 1
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 512K
Name : boba:1 (local to host boba)
UUID : 52eb4bc9:c3d8aab5:e0699505:e0e1aa05
Events : 18
Number Major Minor RaidDevice State
0 8 1 0 active sync /dev/sda1
1 8 65 1 active sync /dev/sde1
2 8 49 2 active sync /dev/sdd1
3 0 0 3 removed
4 8 17 - faulty spare /dev/sdb1
# mdadm --examine /dev/md0
mdadm: No md superblock detected on /dev/md0.
# fdisk -l /dev/md0
Disk /dev/md0: 3000.6 GB,3000602984448 bytes
2 heads,4 sectors/track,732569088 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1572864 bytes
Disk identifier: 0x00000000
Disk /dev/md0 doesn't contain a valid partition table
# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4] [linear] [multipath] [raid0] [raid1] [raid10]
md0 : active raid5 sdb1[4](F) sda1[0] sdd1[2] sde1[1]
2930276352 blocks super 1.2 level 5,512k chunk,algorithm 2 [4/3] [UUU_]
unused devices: <none>
解决方法
这看起来像您的单用户模式.
您的volumegroup和logicalvolume是否在/ dev /中列出？
如果没有,则需要运行lvchange -ay来激活逻辑卷.
对于fsck,您应该使用/ dev / volgroup00 / logvol00作为目标.
