在centos里试图挂载另外一块硬盘,其中的一个分区是LVM2格式的,不能直接mount,方法记录如下,以备不时之需。
1.首先使用vgscan 扫描 lvm 结果如下
[root@localhost ~]# vgscan
Reading all physical volumes. This may take a while…
WARNING: Duplicate VG name VolGroup00: Existing bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh (created here) takes precedence over 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM
WARNING: Duplicate VG name VolGroup00: Existing bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh (created here) takes precedence over 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM
WARNING: Duplicate VG name VolGroup00: Existing 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM (created here) takes precedence over bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh
Found volume group “VolGroup00″ using metadata type lvm2
WARNING: Duplicate VG name VolGroup00: Existing bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh (created here) takes precedence over 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM
Found volume group “VolGroup00″ using metadata type lvm2
2.通过 vgdisplay VolGroup00 查看 lvm 的 VG UUID
[root@localhost ~]# vgdisplay VolGroup00
WARNING: Duplicate VG name VolGroup00: Existing bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh (created here) takes precedence over 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM
— Volume group —
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
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 129.31 GB
PE Size 32.00 MB
Total PE 4138
Alloc PE / Size 4137 / 129.28 GB
Free PE / Size 1 / 32.00 MB
VG UUID bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh
可以看出当前操作系统使用的VolGroup00的 VG UUID 是 bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh
说明 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM 这个VG UUID 是要另一块硬盘的lvm 分区
3.将第二块硬盘的VG的名字重命名
[root@localhost ~]# vgrename 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM /dev/vg01
WARNING: Duplicate VG name VolGroup00: Existing bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh (created here) takes precedence over 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM
WARNING: Duplicate VG name VolGroup00: Existing bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh (created here) takes precedence over 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM
WARNING: Duplicate VG name VolGroup00: Existing 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM (created here) takes precedence over bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh
Volume group “VolGroup00″ successfully renamed to “vg01″
这个时候通过 vgdisplay 就可以看到 VG的信息了
[root@localhost ~]# vgdisplay
— Volume group —
VG Name vg01
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 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 34.50 GB
PE Size 32.00 MB
Total PE 1104
Alloc PE / Size 1103 / 34.47 GB
Free PE / Size 1 / 32.00 MB
VG UUID 1WnXRG-M0t1-z1A6-rppv-lltN-oDQB-IDonTM
— Volume group —
VG Name VolGroup00
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
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 129.31 GB
PE Size 32.00 MB
Total PE 4138
Alloc PE / Size 4137 / 129.28 GB
Free PE / Size 1 / 32.00 MB
VG UUID bgKw70-NEBI-QY6s-RvqU-3a59-N8E1-ruOWwh
4.激活VG
VG重命名后,默认是非ACTIVE状态,我们要通过以下方式激活VG
[root@localhost ~]# lvscan
inactive ‘/dev/vg01/LogVol00′ [31.50 GB] inherit
inactive ‘/dev/vg01/LogVol01′ [2.97 GB] inherit
ACTIVE ‘/dev/VolGroup00/LogVol00′ [125.41 GB] inherit
ACTIVE ‘/dev/VolGroup00/LogVol01′ [3.88 GB] inherit
激活 VG
[root@localhost ~]# vgchange -ay /dev/vg01
2 logical volume(s) in volume group “vg01″ now active
查看状态
[root@localhost ~]# lvscan
ACTIVE ‘/dev/vg01/LogVol00′ [31.50 GB] inherit
ACTIVE ‘/dev/vg01/LogVol01′ [2.97 GB] inherit
ACTIVE ‘/dev/VolGroup00/LogVol00′ [125.41 GB] inherit
ACTIVE ‘/dev/VolGroup00/LogVol01′ [3.88 GB] inherit
[root@localhost ~]# vgscan
Reading all physical volumes. This may take a while…
Found volume group “vg01″ using metadata type lvm2
Found volume group “VolGroup00″ using metadata type lvm2
到此为止,可以挂载系统了!
5.挂载lvm文件系统
[root@localhost mnt]# mount /dev/vg01 /mnt/新建目录
就可以访问了
注:报错时,mount: /dev/vg01 is not a block device,说明 有时vg01可能还有多级目录:如“LogVol01,LogVol00”;需要进入vg01的子目录再挂载。[root@localhost mnt]# mount /dev/vg01/LogVol01 /mnt/新建目录
linux下lvm分区挂载方法
fdisk -l //下面会看到所有硬盘的情况,hda是虚拟机自己的硬盘,hdb则是挂载上去的硬盘
看到最下面Volume group “VolGroup00” successfully renamed to “vg01”则说明改名成功
使用完以后要卸载
修改过卷组名的这个硬盘是不能再启动了,应为默认启动引导是引导到VolGroup00卷组的,所以修改过卷组名的硬盘要想仍能重新启动的话,必须把卷组名修改会默认的VolGroup00
但是在已经有VolGroup00卷组的虚拟机上是不能修改的!这里我们单独建立一个分区格式不是linux lvm格式的虚拟机来挂载硬盘,其格式为ext3的(显示为linux)
在ext3格式分区的虚拟机上直接挂载linux lvm分区的硬盘的方法如下: