linux挂载盘阵权限,redhatlinux下认不到盘阵的解决步骤

周六时服务器关机&＃xff0c;今天早上服务器开机时&＃xff0c;发现日立盘阵找不到了&＃xff0c;上面做了逻辑卷&＃xff0c;生成了/dev/mapper/vgams-lvams设备文件的&＃xff0c;但是今早上发现这个文件没有了&＃xff0c;用pvdisplay命令查看发现原来生成的一个pv的pv name认不到了。请问现在这种情况应该怎么处理&＃xff0c;有什么办法在不损伤盘阵上数据的情况下重新生成mapper目录下的那个设备文件&＃xff1f;或者如何才能备份出里面的数据呢&＃xff1f;谢谢各位大侠救急了&＃xff01;&＃xff01;&＃xff01;&＃xff01;

[root&＃64;io01 etc]# pvdisplay

Couldn&＃39;t find device with uuid &＃39;nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY&＃39;.     &＃61;&＃61;&＃61;&＃61;> 就是丢失的/dev/sdb1这个pv的uuid

......

Couldn&＃39;t find device with uuid &＃39;nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY&＃39;.

Couldn&＃39;t find device with uuid &＃39;nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY&＃39;.

--- Physical volume ---

PV Name             /dev/sdc1

VG Name             vgams

PV Size             975.11 GB / not usable 0

Allocatable           yes (but full)

PE Size (KByte)    4096

Total PE              249629

Free PE             0

Allocated PE       249629

PV UUID             y8Uxl5-pk5g-fed8-fpKG-mHde-nCyF-luYddV

......

--- Physical volume ---

PV Name             /dev/sdi1

VG Name             vgams

PV Size             975.11 GB / not usable 0

Allocatable           yes (but full)

PE Size (KByte)    4096

Total PE              249629

Free PE             0

Allocated PE       249629

PV UUID             BjDowe-lqey-Uc1J-15BY-fPsC-yLfT-upSLgt

--- Physical volume ---

PV Name             unknown device                            &＃61;&＃61;&＃61;&＃61;> 这里pv 名字找不到了&＃xff0c;原本应该是/dev/sdb1

VG Name             vgams

PV Size             899.99 GB / not usable 0

Allocatable           yes (but full)

PE Size (KByte)    4096

Total PE              230398

Free PE             0

Allocated PE       230398

PV UUID             nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY

[root&＃64;io01 etc]#

终于解决了&＃xff0c;就是分区表的问题&＃xff0c;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&＃xff0c;尤其感谢jerrywjl 大侠耐心的指导&＃xff01;再次感谢&＃xff01;&＃xff01;

下面是我最终的解决过程&＃xff1a;

1、首先导出正常pv的分区表&＃xff0c;并做相应修改&＃xff0c;然后恢复不正常pv的分区表&＃xff1a;

[root&＃64;io01 home]# fdisk -l /dev/sdb    &＃61;&＃61;> 分区表乱七八糟&＃xff01;

Disk /dev/sdb: 966.3 GB, 966367641600 bytes

255 heads, 63 sectors/track, 117487 cylinders

Units &＃61; cylinders of 16065 * 512 &＃61; 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&＃43;   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&＃43;   49   Unknown

Partition 4 does not end on cylinder boundary.

Partition table entries are not in disk order

[root&＃64;io01 home]# sfdisk -d /dev/sdd > sdd-table                &＃61;&＃61;&＃61;> 导出正常pv的分区表

[root&＃64;io01 home]# sed &＃39;s/sdd/sdb/g&＃39; sdd-table > sdb-table &＃61;&＃61;&＃61;> 修改分区表中的sdd为sdb

[root&＃64;io01 home]# sfdisk /dev/sdb 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 &＃61; cylinders of 8225280 bytes, blocks of 1024 bytes, counting from 0

Device Boot Start     End #cyls #blocks Id   System

/dev/sdb1 ? 264385&＃43; 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&＃43; 318706- 251855- 2023024920&＃43;   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&＃43; 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&＃43; 154993-   67949- 545800106&＃43;   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 &＃61; 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&＃61;/dev/zero of&＃61;/dev/foo7 bs&＃61;512 count&＃61;1

(See fdisk(

.)

[root&＃64;io01 home]#

2、接下来一步是很重要的一步&＃xff0c;恢复pv&＃xff0c;首先要查看丢失pv的uuid&＃xff1a;

[root&＃64;io01 home]# lvs -a -o &＃43;devices       &＃61;&＃61;&＃61;> 查看丢失卷的uuid

Couldn&＃39;t find device with uuid &＃39;nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY&＃39;.

Couldn&＃39;t find all physical volumes for volume group vgams.

Couldn&＃39;t find device with uuid &＃39;nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY&＃39;.

Couldn&＃39;t find all physical volumes for volume group vgams.

......

[root&＃64;io01 home]# pvcreate --uuid "nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY" --restorefile /etc/lvm/archive/vgams_00000.vg /dev/sdb1    &＃61;&＃61;&＃61;> 重写lvm元数据区&＃xff0c;注意一定要用正确的uuid&＃xff0c;该项操作不会影响到lvm的数据区&＃xff0c;即不会损害数据

Couldn&＃39;t find device with uuid &＃39;nsLqhQ-7new-6cSe-EWQz-kusd-U2Ht-zJ2joY&＃39;.

Physical volume "/dev/sdb1" successfully created

3、恢复卷组、逻辑卷&＃xff0c;并挂载到相应目录&＃xff1a;

[root&＃64;io01 home]# vgcfgrestore vgams    &＃61;&＃61;&＃61;> 恢复卷组

Restored volume group vgams

[root&＃64;io01 home]# lvs -a -o &＃43;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&＃64;io01 home]# ls /dev/vgams

ls: /dev/vgams: No such file or directory

[root&＃64;io01 home]# lvchange -ay /dev/vgams/lvams       &＃61;&＃61;&＃61;> 启用卷&＃xff0c;注意在这步之前/dev/vgams/lvams是没有的

[root&＃64;io01 home]# lvs -a -o &＃43;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&＃64;io01 home]# ls /dev/vgams/lvams

/dev/vgams/lvams

[root&＃64;io01 home]# mount /dev/vgams/lvams /vol    &＃61;&＃61;&＃61;> 挂载卷

[root&＃64;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