环境：Xenserver上一台linux redhat6.5虚拟机
原因：lv扩容的时候出错了，重启后报错如下图
无法进入单用户模式，想把数据拷出来，
重新做了一台redhat6.5，将已经起不来的两块盘挂给新的redhat（这两块盘在一个VG，有一个lv_root跨越这两块盘），这两块盘有3个lv（lv_home,lv_swap,lv_root）

现在情况如下：
[root@localhost backup]# pvs -v
Scanning for physical volume names
PV VG Fmt Attr PSize PFree DevSize PV UUID
/dev/xvda2 Vo lvm2 a-- 99.80g 0 99.80g jIPou4-2S6e-Ng0m-r7DK-N1Xb-PyRK-ApmTwK
/dev/xvdb2 VolGroup lvm2 a-- 99.51g 0 99.51g X9RM9d-vNBB-stsf-M6Ri-zHXg-KEey-6h0ko7
/dev/xvdc1 VolGroup lvm2 a-- 150.00g 0 50.00g lQ1JNM-M6CV-9lds-qG9x-cLF6-mBWo-bD2ep3
[root@localhost backup]# vgs -v
Finding all volume groups
Finding volume group "VolGroup"
Finding volume group "Vo"
VG Attr Ext
#PV #
LV #SN VSize VFree VG UUID VProfile
Vo wz--n- 4.00m 1 2 0 99.80g 0 z96fgE-6jd1-lRNs-4vtL-GqsX-8fKG-IAIc8F
VolGroup wz--n- 4.00m 2 3 0 249.50g 0 5XlR1F-lvhv-Bt40-q2kU-k12e-7GvQ-OIrdlE
[root@localhost backup]# lvs -v
Finding all logical volumes
LV VG #Seg Attr LSize Maj Min KMaj KMin Pool Origin Data% Meta% Move Cpy%Sync Log Convert LV UUID LProfile
Lo Vo 1 -wi-ao---- 2.00g -1 -1 253 0 po9dT3-xF0S-THG8-gDv3-Y963-iycU-swtVGt
Lo01 Vo 1 -wi-ao---- 97.80g -1 -1 253 1 aUHCf6-hqy8-MNxv-LSVD-YfFC-74LB-P2XQtz
lv_home VolGroup 1 -wi-ao---- 10.00g -1 -1 253 4 m17JHy-rQtS-uic0-9trH-EyeO-ugRE-ZlKyoz
lv_root VolGroup 2 -wi-s----- 223.50g -1 -1 253 2 0iftx2-6Oo9-90JJ-547i-SlZj-xaaA-r3foG8
lv_swap VolGroup 1 -wi-a----- 16.00g -1 -1 253 3 6HhXIj-x81n-OrfM-TwBD-6zT1-qW7E-iA1jJJ
[root@localhost backup]# vgdisplay
--- Volume group ---
VG Name VolGroup
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 17
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 1
Max PV 0
Cur PV 2
Act PV 2
VG Size 249.50 GiB
PE Size 4.00 MiB
Total PE 63873
Alloc PE / Size 63873 / 249.50 GiB
Free PE / Size 0 / 0
VG UUID 5XlR1F-lvhv-Bt40-q2kU-k12e-7GvQ-OIrdlE
--- Volume group ---
VG Name Vo
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 99.80 GiB
PE Size 4.00 MiB
Total PE 25549
Alloc PE / Size 25549 / 99.80 GiB
Free PE / Size 0 / 0
VG UUID z96fgE-6jd1-lRNs-4vtL-GqsX-8fKG-IAIc8F
下面这个能看出来lv_root的状态不正常
[root@localhost backup]# lvdisplay
--- Logical volume ---
LV Path /dev/VolGroup/lv_root
LV Name lv_root
VG Name VolGroup
LV UUID 0iftx2-6Oo9-90JJ-547i-SlZj-xaaA-r3foG8
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2014-03-10 17:26:08 +0800
LV Status suspended
# open 0
LV Size 223.50 GiB
Current LE 57217
Segments 2
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/VolGroup/lv_swap
LV Name lv_swap
VG Name VolGroup
LV UUID 6HhXIj-x81n-OrfM-TwBD-6zT1-qW7E-iA1jJJ
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2014-03-10 17:26:16 +0800
LV Status available
# open 0
LV Size 16.00 GiB
Current LE 4096
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:3
--- Logical volume ---
LV Path /dev/VolGroup/lv_home
LV Name lv_home
VG Name VolGroup
LV UUID m17JHy-rQtS-uic0-9trH-EyeO-ugRE-ZlKyoz
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2014-03-10 17:26:17 +0800
LV Status available
# open 1
LV Size 10.00 GiB
Current LE 2560
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:4
--- Logical volume ---
LV Path /dev/Vo/Lo
LV Name Lo
VG Name Vo
LV UUID po9dT3-xF0S-THG8-gDv3-Y963-iycU-swtVGt
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2018-05-22 14:46:17 +0800
LV Status available
# open 1
LV Size 2.00 GiB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/Vo/Lo01
LV Name Lo01
VG Name Vo
LV UUID aUHCf6-hqy8-MNxv-LSVD-YfFC-74LB-P2XQtz
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2018-05-22 14:46:17 +0800
LV Status available
# open 1
LV Size 97.80 GiB
Current LE 25037
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1

下面的这个命令也看不到lv_root
[root@localhost backup]# lvmdiskscan
/dev/ram0 [ 16.00 MiB]
/dev/Vo/Lo [ 2.00 GiB]
/dev/ram1 [ 16.00 MiB]
/dev/xvda1 [ 200.00 MiB]
/dev/root [ 97.80 GiB]
/dev/ram2 [ 16.00 MiB]
/dev/xvda2 [ 99.80 GiB] LVM physical volume
/dev/ram3 [ 16.00 MiB]
/dev/VolGroup/lv_swap [ 16.00 GiB]
/dev/ram4 [ 16.00 MiB]
/dev/VolGroup/lv_home [ 10.00 GiB]
/dev/ram5 [ 16.00 MiB]
/dev/ram6 [ 16.00 MiB]
/dev/ram7 [ 16.00 MiB]
/dev/ram8 [ 16.00 MiB]
/dev/ram9 [ 16.00 MiB]
/dev/ram10 [ 16.00 MiB]
/dev/ram11 [ 16.00 MiB]
/dev/ram12 [ 16.00 MiB]
/dev/ram13 [ 16.00 MiB]
/dev/ram14 [ 16.00 MiB]
/dev/ram15 [ 16.00 MiB]
/dev/xvdb1 [ 500.00 MiB]
/dev/xvdb2 [ 99.51 GiB] LVM physical volume
/dev/xvdc1 [ 50.00 GiB] LVM physical volume
4 disks
18 partitions
0 LVM physical volume whole disks
3 LVM physical volumes
这个目录下也没有lv_root,但是lv_home是可以挂载的，里面的东西都在
[root@localhost backup]# cd /dev/VolGroup/
[root@localhost VolGroup]# ls
lv_home lv_swap
求教怎么找回lv_root,谢谢，有需要其他配置信息，可以联系我，[email protected]