Sub-mount LVM partition method under Linux __linux

1. First Use Vgscan scan LVM results are as follows

[Root@localhost ~]# Vgscan
Reading all physical volumes. This could take a while ...
Warning:duplicate VG name Volgroup00:existing BGKW70-NEBI-QY6S-RVQU-3A59-N8E1-RUOWWH (created here) takes precedence ER 1wnxrg-m0t1-z1a6-rppv-lltn-odqb-idontm
Warning:duplicate VG name Volgroup00:existing BGKW70-NEBI-QY6S-RVQU-3A59-N8E1-RUOWWH (created here) takes precedence ER 1wnxrg-m0t1-z1a6-rppv-lltn-odqb-idontm
Warning:duplicate VG name Volgroup00:existing 1wnxrg-m0t1-z1a6-rppv-lltn-odqb-idontm (created here) takes precedence ER 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 ER 1wnxrg-m0t1-z1a6-rppv-lltn-odqb-idontm
Found Volume Group "volgroup00″using metadata type LVM2

2. View LVM VG UUID via Vgdisplay VolGroup00

[Root@localhost ~]# Vgdisplay VolGroup00
Warning:duplicate VG name Volgroup00:existing BGKW70-NEBI-QY6S-RVQU-3A59-N8E1-RUOWWH (created here) takes precedence ER 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

You can see that the VolGroup00 VG UUID used by the current operating system is BGKW70-NEBI-QY6S-RVQU-3A59-N8E1-RUOWWH
Description 1WNXRG-M0T1-Z1A6-RPPV-LLTN-ODQB-IDONTM This VG UUID is an LVM partition for another hard drive

3. Rename the VG name of the second hard drive

[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 ER 1wnxrg-m0t1-z1a6-rppv-lltn-odqb-idontm
Warning:duplicate VG name Volgroup00:existing BGKW70-NEBI-QY6S-RVQU-3A59-N8E1-RUOWWH (created here) takes precedence ER 1wnxrg-m0t1-z1a6-rppv-lltn-odqb-idontm
Warning:duplicate VG name Volgroup00:existing 1wnxrg-m0t1-z1a6-rppv-lltn-odqb-idontm (created here) takes precedence ER BGKW70-NEBI-QY6S-RVQU-3A59-N8E1-RUOWWH
Volume Group "volgroup00″successfully renamed to" Vg01″

This is the time to see the VG information through Vgdisplay.

[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. Activate VG

After the VG is renamed, the default is non-active, and we have to activate the VG in the following ways

[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

Activate VG
[Root@localhost ~]# VGCHANGE-AY/DEV/VG01
2 Logical Volume (s) in volume Group "Vg01″now Active

View status
[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 could take a while ...
Found Volume Group "vg01″using metadata type LVM2
Found Volume Group "volgroup00″using metadata type LVM2

So far, you can mount the system.

5. Mount LVM File System

[Root@localhost mnt]# MOUNT/DEV/VG01/MNT/SDB3

will be able to access the

Source: http://www.opensolution.org.cn/archives/431.html