- 论坛徽章:
- 0
|
原帖由 jerrywjl 于 2009-4-21 10:08 发表 ![]()
那就备份整个sdb，不要备份sdb1吧。
另外，在虚拟机上做一次实验有助于你后续的操作。
终于解决了，就是分区表的问题，恢复一下分区表就可以了。在这里感谢各位兄弟姐妹的支持和帮助，尤其感谢jerrywjl 大侠耐心的指导！再次感谢！！
下面是我最终的解决过程：
1、首先导出正常pv的分区表，并做相应修改，然后恢复不正常pv的分区表：
[root@io01 home]# fdisk -l /dev/sdb ==> 分区表乱七八糟！
Disk /dev/sdb: 966.3 GB, 966367641600 bytes
255 heads, 63 sectors/track, 117487 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 ? 264386 257082 2088818490 1 FAT12
Partition 1 does not end on cylinder boundary.
/dev/sdb2 ? 66852 51358 2023024920+ 42 SFS
Partition 2 does not end on cylinder boundary.
/dev/sdb3 ? 105920 105961 329394 6f Unknown
Partition 3 does not end on cylinder boundary.
/dev/sdb4 87045 154994 545800106+ 49 Unknown
Partition 4 does not end on cylinder boundary.
Partition table entries are not in disk order
[root@io01 home]# sfdisk -d /dev/sdd > sdd-table ===> 导出正常pv的分区表
[root@io01 home]# sed 's/sdd/sdb/g' sdd-table > sdb-table ===> 修改分区表中的sdd为sdb
[root@io01 home]# sfdisk /dev/sdb < sdb-table ===> 恢复丢失pv的分布表
Checking that no-one is using this disk right now ...
OK
Disk /dev/sdb: 117487 cylinders, 255 heads, 63 sectors/track
Old situation:
Units = cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0
Device Boot Start End #cyls #blocks Id System
/dev/sdb1 ? 264385+ 524430- 260046- 2088818490 1 FAT12
start: (c,h,s) expected (1023,254,63) found (124,38,11)
end: (c,h,s) expected (1023,254,63) found (344,195,26)
/dev/sdb2 ? 66851+ 318706- 251855- 2023024920+ 42 SFS
start: (c,h,s) expected (1023,254,63) found (453,241,50)
end: (c,h,s) expected (1023,254,63) found (26,59,22)
/dev/sdb3 ? 105919+ 105960- 42- 329394 6f Unknown
start: (c,h,s) expected (1023,254,63) found (367,183,2)
end: (c,h,s) expected (1023,254,63) found (102,116,32)
/dev/sdb4 87044+ 154993- 67949- 545800106+ 49 Unknown
start: (c,h,s) expected (1023,254,63) found (332,76,4)
end: (c,h,s) expected (1023,254,63) found (344,78,21)
New situation:
Units = sectors of 512 bytes, counting from 0
Device Boot Start End #sectors Id System
/dev/sdb1 63 1887428654 1887428592 8e Linux LVM
/dev/sdb2 0 - 0 0 Empty
/dev/sdb3 0 - 0 0 Empty
/dev/sdb4 0 - 0 0 Empty
Warning: no primary partition is marked bootable (active)
This does not matter for LILO, but the DOS MBR will not boot this disk.
Successfully wrote the new partition table
Re-reading the partition table ...
If you created or changed a DOS partition, /dev/foo7, say, then use dd(1)
to zero the first 512 bytes: dd if=/dev/zero of=/dev/foo7 bs=512 count=1
(See fdisk( .)
[root@io01 home]#
2、接下来一步是很重要的一步，恢复pv，首先要查看丢失pv的uuid：
[root@io01 home]# lvs -a -o +devices ===> 查看丢失卷的uuid
Couldn't find device with uuid 'nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY'.
Couldn't find all physical volumes for volume group vgams.
Couldn't find device with uuid 'nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY'.
Couldn't find all physical volumes for volume group vgams.
......
[root@io01 home]# pvcreate --uuid "nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY" --restorefile /etc/lvm/archive/vgams_00000.vg /dev/sdb1 ===> 重写lvm元数据区，注意一定要用正确的uuid，该项操作不会影响到lvm的数据区，即不会损害数据
Couldn't find device with uuid 'nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY'.
Physical volume "/dev/sdb1" successfully created
3、恢复卷组、逻辑卷，并挂载到相应目录：
[root@io01 home]# vgcfgrestore vgams ===> 恢复卷组
Restored volume group vgams
[root@io01 home]# lvs -a -o +devices
LV VG Attr LSize Origin Snap% Move Log Copy% Devices
lvams vgams -wi--- 7.32T /dev/sdc1(0)
lvams vgams -wi--- 7.32T /dev/sde1(0)
lvams vgams -wi--- 7.32T /dev/sdg1(0)
lvams vgams -wi--- 7.32T /dev/sdi1(0)
lvams vgams -wi--- 7.32T /dev/sdd1(0)
lvams vgams -wi--- 7.32T /dev/sdf1(0)
lvams vgams -wi--- 7.32T /dev/sdh1(0)
lvams vgams -wi--- 7.32T /dev/sdb1(0)
[root@io01 home]# ls /dev/vgams
ls: /dev/vgams: No such file or directory
[root@io01 home]# lvchange -ay /dev/vgams/lvams ===> 启用卷，注意在这步之前/dev/vgams/lvams是没有的
[root@io01 home]# lvs -a -o +devices
LV VG Attr LSize Origin Snap% Move Log Copy% Devices
lvams vgams -wi-a- 7.32T /dev/sdc1(0)
lvams vgams -wi-a- 7.32T /dev/sde1(0)
lvams vgams -wi-a- 7.32T /dev/sdg1(0)
lvams vgams -wi-a- 7.32T /dev/sdi1(0)
lvams vgams -wi-a- 7.32T /dev/sdd1(0)
lvams vgams -wi-a- 7.32T /dev/sdf1(0)
lvams vgams -wi-a- 7.32T /dev/sdh1(0)
lvams vgams -wi-a- 7.32T /dev/sdb1(0)
[root@io01 home]# ls /dev/vgams/lvams
/dev/vgams/lvams
[root@io01 home]# mount /dev/vgams/lvams /vol ===> 挂载卷
[root@io01 home]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 20G 13G 5.8G 69% /
none 3.9G 0 3.9G 0% /dev/shm
/dev/sda5 130G 16G 108G 13% /home
/dev/sda2 20G 454M 19G 3% /var
/dev/sda3 99G 6.6G 87G 8% /soft
/dev/mapper/vgams-lvams
7.3T 3.1T 4.2T 43% /vol
[ 本帖最后由 Lippman 于 2009-4-21 15:09 编辑 ] |
|
免费注册
楼主: Lippman
发表于 2009-04-20 18:06
