查看当前系统情况：
[root@linuxme scsi]# pwd
/proc/scsi
[root@linuxme scsi]#
[root@linuxme scsi]# cat scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: NECVMWar Model: VMware IDE CDR10 Rev: 1.00
Type: CD-ROM ANSI SCSI revision: 05
Host: scsi0 Channel: 00 Id: 01 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 03 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: VMware Model: Virtual disk Rev: 1.0
Type: Direct-Access ANSI SCSI revision: 02
[root@linuxme scsi]#
[root@linuxme scsi]# fdisk -l | grep --color "Disk /dev/sd"
Disk /dev/sda: 322.1 GB, 322122547200 bytes
Disk /dev/sdb: 64.4 GB, 64424509440 bytes
Disk /dev/sdc: 53.7 GB, 53687091200 bytes
Disk /dev/sdd: 32.2 GB, 32212254720 bytes
Disk /dev/sde: 236.2 GB, 236223201280 bytes
[root@linuxme scsi]#
[root@linuxme scsi]# pvs -o +devices -v
Scanning for physical volume names
PV VG Fmt Attr PSize PFree DevSize PV UUID Devices
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(0)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(12800)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(74670)
[root@linuxme scsi]#
[root@linuxme scsi]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme scsi]#
[root@linuxme scsi]# lvs -o +devices -v
Finding all logical volumes
LV VG #Seg Attr LSize Maj Min KMaj KMin Pool Origin Data% Meta% Move Copy% Log Convert LV UUID Devices
lv_home vg_linuxme 1 -wi-ao-- 241.68g -1 -1 253 2 O5gF2z-0agB-w3fc-CZeA-lf4S-6Cfq-1h4iaU /dev/sda2(12800)
lv_root vg_linuxme 1 -wi-ao-- 50.00g -1 -1 253 0 z1Hk1n-QsD3-EgdU-MhCZ-INEf-alIo-o9UaiV /dev/sda2(0)
lv_swap vg_linuxme 1 -wi-ao-- 7.83g -1 -1 253 1 Cmk5On-Mwbz-bbbI-dNGT-D9j4-GCSD-YVRvAb /dev/sda2(74670)
[root@linuxme scsi]#创建样例：
[root@linuxme scsi]# pvcreate /dev/sdb
Writing physical volume data to disk "/dev/sdb"
Physical volume "/dev/sdb" successfully created
[root@linuxme scsi]#
[root@linuxme scsi]# pvcreate /dev/sdc
Writing physical volume data to disk "/dev/sdc"
Physical volume "/dev/sdc" successfully created
[root@linuxme scsi]#
[root@linuxme scsi]# pvcreate /dev/sdd
Writing physical volume data to disk "/dev/sdd"
Physical volume "/dev/sdd" successfully created
[root@linuxme scsi]#
[root@linuxme scsi]# pvs -o +devices -v
Scanning for physical volume names
PV VG Fmt Attr PSize PFree DevSize PV UUID Devices
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(0)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(12800)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(74670)
/dev/sdb lvm2 a-- 60.00g 60.00g 60.00g iOfOkl-DYws-HbnH-oyGB-qsHn-4E3z-45RrdZ
/dev/sdc lvm2 a-- 50.00g 50.00g 50.00g pJgpM0-vjl5-i789-AbXi-uQfT-IYhx-8seRPj
/dev/sdd lvm2 a-- 30.00g 30.00g 30.00g 1UI7pu-UP22-YwLc-rdyk-4ZSu-4j08-uhd4rj
[root@linuxme scsi]#
[root@linuxme scsi]# vgcreate data_vg /dev/sdb /dev/sdc /dev/sdd
Volume group "data_vg" successfully created
[root@linuxme scsi]#
[root@linuxme scsi]# pvs -o +devices -v
Scanning for physical volume names
PV VG Fmt Attr PSize PFree DevSize PV UUID Devices
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(0)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(12800)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(74670)
/dev/sdb data_vg lvm2 a-- 60.00g 60.00g 60.00g iOfOkl-DYws-HbnH-oyGB-qsHn-4E3z-45RrdZ
/dev/sdc data_vg lvm2 a-- 50.00g 50.00g 50.00g pJgpM0-vjl5-i789-AbXi-uQfT-IYhx-8seRPj
/dev/sdd data_vg lvm2 a-- 30.00g 30.00g 30.00g 1UI7pu-UP22-YwLc-rdyk-4ZSu-4j08-uhd4rj
[root@linuxme scsi]#
[root@linuxme scsi]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme scsi]#
[root@linuxme scsi]# vgdisplay -v data_vg | grep --color "PV Name"
Using volume group(s) on command line
Finding volume group "data_vg"
PV Name /dev/sdb
PV Name /dev/sdc
PV Name /dev/sdd
[root@linuxme scsi]#
[root@linuxme scsi]# vgdisplay data_vg -v
Using volume group(s) on command line
Finding volume group "data_vg"
--- Volume group ---
VG Name data_vg
System ID
Format lvm2
Metadata Areas 3
Metadata Sequence No 1
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 0
Open LV 0
Max PV 0
Cur PV 3
Act PV 3
VG Size 139.99 GiB
PE Size 4.00 MiB
Total PE 35837
Alloc PE / Size 0 / 0
Free PE / Size 35837 / 139.99 GiB
VG UUID 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s
--- Physical volumes ---
PV Name /dev/sdb
PV UUID iOfOkl-DYws-HbnH-oyGB-qsHn-4E3z-45RrdZ
PV Status allocatable
Total PE / Free PE 15359 / 15359
PV Name /dev/sdc
PV UUID pJgpM0-vjl5-i789-AbXi-uQfT-IYhx-8seRPj
PV Status allocatable
Total PE / Free PE 12799 / 12799
PV Name /dev/sdd
PV UUID 1UI7pu-UP22-YwLc-rdyk-4ZSu-4j08-uhd4rj
PV Status allocatable
Total PE / Free PE 7679 / 7679
[root@linuxme scsi]#
[root@linuxme scsi]# lvs -o +devices -v
Finding all logical volumes
LV VG #Seg Attr LSize Maj Min KMaj KMin Pool Origin Data% Meta% Move Copy% Log Convert LV UUID Devices
lv_home vg_linuxme 1 -wi-ao-- 241.68g -1 -1 253 2 O5gF2z-0agB-w3fc-CZeA-lf4S-6Cfq-1h4iaU /dev/sda2(12800)
lv_root vg_linuxme 1 -wi-ao-- 50.00g -1 -1 253 0 z1Hk1n-QsD3-EgdU-MhCZ-INEf-alIo-o9UaiV /dev/sda2(0)
lv_swap vg_linuxme 1 -wi-ao-- 7.83g -1 -1 253 1 Cmk5On-Mwbz-bbbI-dNGT-D9j4-GCSD-YVRvAb /dev/sda2(74670)
[root@linuxme scsi]#
[root@linuxme scsi]# lvcreate -L +100G -n lv_data data_vg
Logical volume "lv_data" created
[root@linuxme scsi]#
[root@linuxme scsi]# lvs -o +devices -v
Finding all logical volumes
LV VG #Seg Attr LSize Maj Min KMaj KMin Pool Origin Data% Meta% Move Copy% Log Convert LV UUID Devices
lv_data data_vg 2 -wi-a--- 100.00g -1 -1 253 3 hR4oLZ-XNHu-tx2z-EwKH-XFhx-862w-4klt73 /dev/sdb(0)
lv_data data_vg 2 -wi-a--- 100.00g -1 -1 253 3 hR4oLZ-XNHu-tx2z-EwKH-XFhx-862w-4klt73 /dev/sdc(0)
lv_home vg_linuxme 1 -wi-ao-- 241.68g -1 -1 253 2 O5gF2z-0agB-w3fc-CZeA-lf4S-6Cfq-1h4iaU /dev/sda2(12800)
lv_root vg_linuxme 1 -wi-ao-- 50.00g -1 -1 253 0 z1Hk1n-QsD3-EgdU-MhCZ-INEf-alIo-o9UaiV /dev/sda2(0)
lv_swap vg_linuxme 1 -wi-ao-- 7.83g -1 -1 253 1 Cmk5On-Mwbz-bbbI-dNGT-D9j4-GCSD-YVRvAb /dev/sda2(74670)
[root@linuxme scsi]#
[root@linuxme scsi]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
data_vg wz--n- 4.00m 3 1 0 139.99g 39.99g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sdb(0)
data_vg wz--n- 4.00m 3 1 0 139.99g 39.99g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sdc(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme scsi]#
格式化文件系统：
[root@linuxme scsi]# mkfs.ext4 /dev/data_vg/lv_data
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
6553600 inodes, 26214400 blocks
1310720 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
800 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 36 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
[root@linuxme scsi]#
挂载起来：
[root@linuxme scsi]# mkdir /data_me
[root@linuxme scsi]#
[root@linuxme scsi]# mount /dev/data_vg/lv_data /data_me/
[root@linuxme scsi]#
[root@linuxme scsi]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_linuxme-lv_root
50G 6.3G 41G 14% /
tmpfs 4.0G 236K 4.0G 1% /dev/shm
/dev/sda1 485M 37M 423M 8% /boot
/dev/mapper/vg_linuxme-lv_home
238G 188M 226G 1% /home
/dev/mapper/data_vg-lv_data
99G 188M 94G 1% /data_me
[root@linuxme scsi]#
上传一些文件数据：
[root@linuxme scsi]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_linuxme-lv_root
50G 6.3G 41G 14% /
tmpfs 4.0G 236K 4.0G 1% /dev/shm
/dev/sda1 485M 37M 423M 8% /boot
/dev/mapper/vg_linuxme-lv_home
238G 188M 226G 1% /home
/dev/mapper/data_vg-lv_data
99G 8.0G 86G 9% /data_me
[root@linuxme scsi]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_linuxme-lv_root
50G 6.3G 41G 14% /
tmpfs 4.0G 236K 4.0G 1% /dev/shm
/dev/sda1 485M 37M 423M 8% /boot
/dev/mapper/vg_linuxme-lv_home
238G 188M 226G 1% /home
/dev/mapper/data_vg-lv_data
99G 8.4G 86G 9% /data_me
[root@linuxme scsi]#
[root@linuxme scsi]# ls -ltr --time-style="+|%Y-%m-%d|%H:%M:%S|" /data_me/
total 9269632
drwx------ 2 root root 16384 |2016-09-13|15:01:21| lost+found
drwxr-xr-x 12 root root 4096 |2016-09-13|15:12:14| software
-rw-r--r-- 1 root root 2409052160 |2016-09-13|15:16:45| SYMANTEC.iso
-rw-r--r-- 1 root root 3916431360 |2016-09-13|15:21:17| CentOS-6.8-x86_64-bin-DVD1.iso
-rw-r--r-- 1 root root 3166584832 |2016-09-13|15:23:44| en_windows_server_2008_r2_standard_enterprise_datacenter_and_web_with_sp1_x64_dvd_617601.iso
[root@linuxme scsi]#
[root@linuxme scsi]# du -sh /data_me/
9.7G /data_me/
[root@linuxme scsi]#
开始做数据迁移：
将/data_me的数据，迁移到/dev/sde中。
将新的设备加入data_vg：
[root@linuxme scsi]# pvs -o +devices -v
Scanning for physical volume names
PV VG Fmt Attr PSize PFree DevSize PV UUID Devices
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(0)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(12800)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(74670)
/dev/sdb data_vg lvm2 a-- 60.00g 0 60.00g iOfOkl-DYws-HbnH-oyGB-qsHn-4E3z-45RrdZ /dev/sdb(0)
/dev/sdc data_vg lvm2 a-- 50.00g 9.99g 50.00g pJgpM0-vjl5-i789-AbXi-uQfT-IYhx-8seRPj /dev/sdc(0)
/dev/sdc data_vg lvm2 a-- 50.00g 9.99g 50.00g pJgpM0-vjl5-i789-AbXi-uQfT-IYhx-8seRPj
/dev/sdd data_vg lvm2 a-- 30.00g 30.00g 30.00g 1UI7pu-UP22-YwLc-rdyk-4ZSu-4j08-uhd4rj
[root@linuxme scsi]#
[root@linuxme scsi]# fdisk -l | grep --color "Disk /dev/sd"
Disk /dev/sda: 322.1 GB, 322122547200 bytes
Disk /dev/sdb: 64.4 GB, 64424509440 bytes
Disk /dev/sdc: 53.7 GB, 53687091200 bytes
Disk /dev/sdd: 32.2 GB, 32212254720 bytes
Disk /dev/sde: 236.2 GB, 236223201280 bytes
[root@linuxme scsi]#
[root@linuxme scsi]# pvcreate /dev/sde
Writing physical volume data to disk "/dev/sde"
Physical volume "/dev/sde" successfully created
[root@linuxme scsi]#
[root@linuxme scsi]# vgdisplay data_vg -v | grep --color "PV Name"
Using volume group(s) on command line
Finding volume group "data_vg"
PV Name /dev/sdb
PV Name /dev/sdc
PV Name /dev/sdd
[root@linuxme scsi]#
[root@linuxme scsi]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
data_vg wz--n- 4.00m 3 1 0 139.99g 39.99g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sdb(0)
data_vg wz--n- 4.00m 3 1 0 139.99g 39.99g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sdc(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme scsi]#
[root@linuxme scsi]# vgextend data_vg /dev/sde
Volume group "data_vg" successfully extended
[root@linuxme scsi]#
[root@linuxme scsi]# vgdisplay data_vg -v | grep --color "PV Name"
Using volume group(s) on command line
Finding volume group "data_vg"
PV Name /dev/sdb
PV Name /dev/sdc
PV Name /dev/sdd
PV Name /dev/sde
[root@linuxme scsi]#
[root@linuxme scsi]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
data_vg wz--n- 4.00m 4 1 0 359.98g 259.98g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sdb(0)
data_vg wz--n- 4.00m 4 1 0 359.98g 259.98g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sdc(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme scsi]#
执行LVM迁移：
[root@linuxme scsi]# lvconvert -m 1 /dev/data_vg/lv_data /dev/sde data_vg/lv_data: Converted: 0.0% data_vg/lv_data: Converted: 0.3% data_vg/lv_data: Converted: 0.6% data_vg/lv_data: Converted: 0.9% data_vg/lv_data: Converted: 1.3% data_vg/lv_data: Converted: 1.6% data_vg/lv_data: Converted: 1.9% data_vg/lv_data: Converted: 2.2% data_vg/lv_data: Converted: 2.5% data_vg/lv_data: Converted: 2.8% data_vg/lv_data: Converted: 3.1% data_vg/lv_data: Converted: 3.4% data_vg/lv_data: Converted: 3.6% data_vg/lv_data: Converted: 3.8% data_vg/lv_data: Converted: 4.1% data_vg/lv_data: Converted: 4.3% data_vg/lv_data: Converted: 4.6% data_vg/lv_data: Converted: 4.9% data_vg/lv_data: Converted: 5.3% data_vg/lv_data: Converted: 5.6% data_vg/lv_data: Converted: 5.8% data_vg/lv_data: Converted: 6.1% data_vg/lv_data: Converted: 6.5% data_vg/lv_data: Converted: 6.8% data_vg/lv_data: Converted: 7.1% data_vg/lv_data: Converted: 7.4% data_vg/lv_data: Converted: 7.8% data_vg/lv_data: Converted: 8.1% data_vg/lv_data: Converted: 8.3% data_vg/lv_data: Converted: 8.7% data_vg/lv_data: Converted: 9.0% data_vg/lv_data: Converted: 9.3% data_vg/lv_data: Converted: 9.7% data_vg/lv_data: Converted: 10.0% data_vg/lv_data: Converted: 10.4% （... ... 过多的输出。） data_vg/lv_data: Converted: 94.8% data_vg/lv_data: Converted: 95.1% data_vg/lv_data: Converted: 95.3% data_vg/lv_data: Converted: 95.6% data_vg/lv_data: Converted: 95.9% data_vg/lv_data: Converted: 96.3% data_vg/lv_data: Converted: 96.6% data_vg/lv_data: Converted: 97.0% data_vg/lv_data: Converted: 97.3% data_vg/lv_data: Converted: 97.7% data_vg/lv_data: Converted: 98.1% data_vg/lv_data: Converted: 98.5% data_vg/lv_data: Converted: 98.8% data_vg/lv_data: Converted: 99.2% data_vg/lv_data: Converted: 99.5% data_vg/lv_data: Converted: 99.8% data_vg/lv_data: Converted: 100.0% [root@linuxme Desktop]#
注意：
在这一步，有时候可能会遇到错误：
Insufficient suitable allocatable extents for logical volume : xxxxx more required
Unable to allocate extents for mirror(s).
可以通过添加【–mirrorlog core】解决，如下：
lvconvert -m 1 –mirrorlog core /dev/data_vg/lv_data /dev/sde
迁移完成后，查看下当前的逻辑卷的状态：
[root@linuxme ~]# lvs -o +devices -v
Finding all logical volumes
LV VG #Seg Attr LSize Maj Min KMaj KMin Pool Origin Data% Meta% Move Copy% Log Convert LV UUID Devices
lv_data data_vg 1 mwi-aom- 100.00g -1 -1 253 3 100.00 lv_data_mlog hR4oLZ-XNHu-tx2z-EwKH-XFhx-862w-4klt73 lv_data_mimage_0(0),lv_data_mimage_1(0)
lv_home vg_linuxme 1 -wi-ao-- 241.68g -1 -1 253 2 O5gF2z-0agB-w3fc-CZeA-lf4S-6Cfq-1h4iaU /dev/sda2(12800)
lv_root vg_linuxme 1 -wi-ao-- 50.00g -1 -1 253 0 z1Hk1n-QsD3-EgdU-MhCZ-INEf-alIo-o9UaiV /dev/sda2(0)
lv_swap vg_linuxme 1 -wi-ao-- 7.83g -1 -1 253 1 Cmk5On-Mwbz-bbbI-dNGT-D9j4-GCSD-YVRvAb /dev/sda2(74670)
[root@linuxme ~]#
[root@linuxme ~]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
data_vg wz--n- 4.00m 4 1 0 359.98g 159.98g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s lv_data_mimage_0(0),lv_data_mimage_1(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme ~]#
[root@linuxme ~]# pvs -o +devices -v
Scanning for physical volume names
PV VG Fmt Attr PSize PFree DevSize PV UUID Devices
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(0)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(12800)
/dev/sda2 vg_linuxme lvm2 a-- 299.51g 0 299.51g uUCVqU-4Pyb-ghFY-kecm-Rhmj-Ll1N-Lw0S2Q /dev/sda2(74670)
/dev/sdb data_vg lvm2 a-- 60.00g 0 60.00g iOfOkl-DYws-HbnH-oyGB-qsHn-4E3z-45RrdZ /dev/sdb(0)
/dev/sdc data_vg lvm2 a-- 50.00g 9.99g 50.00g pJgpM0-vjl5-i789-AbXi-uQfT-IYhx-8seRPj /dev/sdc(0)
/dev/sdc data_vg lvm2 a-- 50.00g 9.99g 50.00g pJgpM0-vjl5-i789-AbXi-uQfT-IYhx-8seRPj
/dev/sdd data_vg lvm2 a-- 30.00g 30.00g 30.00g 1UI7pu-UP22-YwLc-rdyk-4ZSu-4j08-uhd4rj
/dev/sde data_vg lvm2 a-- 220.00g 119.99g 220.00g H0P8dC-Ekru-o8d2-H6Xb-oF1q-8RRx-0IF2v3 /dev/sde(0)
/dev/sde data_vg lvm2 a-- 220.00g 119.99g 220.00g H0P8dC-Ekru-o8d2-H6Xb-oF1q-8RRx-0IF2v3 /dev/sde(15359)
/dev/sde data_vg lvm2 a-- 220.00g 119.99g 220.00g H0P8dC-Ekru-o8d2-H6Xb-oF1q-8RRx-0IF2v3 /dev/sde(15360)
/dev/sde data_vg lvm2 a-- 220.00g 119.99g 220.00g H0P8dC-Ekru-o8d2-H6Xb-oF1q-8RRx-0IF2v3
[root@linuxme ~]#
[root@linuxme ~]# vgdisplay -v data_vg | grep --color "PV Name"
Using volume group(s) on command line
Finding volume group "data_vg"
PV Name /dev/sdb
PV Name /dev/sdc
PV Name /dev/sdd
PV Name /dev/sde
[root@linuxme ~]#
从镜像中删除旧的PV：
（错误的方式）
[root@linuxme ~]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
data_vg wz--n- 4.00m 4 1 0 359.98g 159.98g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s lv_data_mimage_0(0),lv_data_mimage_1(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme ~]#
[root@linuxme ~]# lvconvert -m 0 /dev/data_vg/lv_data /dev/sdb
Logical volume lv_data converted.
[root@linuxme ~]#
[root@linuxme ~]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
data_vg wz--n- 4.00m 4 1 0 359.98g 259.98g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sdb(0)
data_vg wz--n- 4.00m 4 1 0 359.98g 259.98g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sdc(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme ~]#
[root@linuxme ~]# vgdisplay -v data_vg | grep --color "PV Name"
Using volume group(s) on command line
Finding volume group "data_vg"
PV Name /dev/sdb
PV Name /dev/sdc
PV Name /dev/sdd
PV Name /dev/sde
[root@linuxme ~]#
[root@linuxme ~]# vgreduce data_vg /dev/sdb
Physical volume "/dev/sdb" still in use
[root@linuxme ~]#可以看到，这里PV显示正在被使用，无法从VG中移除。
（正确的方式）
[root@linuxme ~]# vgdisplay -v data_vg | grep --color "PV Name"
Using volume group(s) on command line
Finding volume group "data_vg"
PV Name /dev/sdb
PV Name /dev/sdc
PV Name /dev/sde
PV Name /dev/sdd
[root@linuxme ~]#
[root@linuxme ~]# vgreduce data_vg /dev/sdb /dev/sdc /dev/sdd
Physical volume "/dev/sdb" still in use
Physical volume "/dev/sdc" still in use
Removed "/dev/sdd" from volume group "data_vg"
[root@linuxme ~]#
[root@linuxme ~]# lvs -o +devices -v
Finding all logical volumes
LV VG #Seg Attr LSize Maj Min KMaj KMin Pool Origin Data% Meta% Move Copy% Log Convert LV UUID Devices
lv_data data_vg 1 mwi-a-m- 100.00g -1 -1 253 3 100.00 lv_data_mlog hR4oLZ-XNHu-tx2z-EwKH-XFhx-862w-4klt73 lv_data_mimage_0(0),lv_data_mimage_1(0)
lv_home vg_linuxme 1 -wi-ao-- 241.68g -1 -1 253 2 O5gF2z-0agB-w3fc-CZeA-lf4S-6Cfq-1h4iaU /dev/sda2(12800)
lv_root vg_linuxme 1 -wi-ao-- 50.00g -1 -1 253 0 z1Hk1n-QsD3-EgdU-MhCZ-INEf-alIo-o9UaiV /dev/sda2(0)
lv_swap vg_linuxme 1 -wi-ao-- 7.83g -1 -1 253 1 Cmk5On-Mwbz-bbbI-dNGT-D9j4-GCSD-YVRvAb /dev/sda2(74670)
[root@linuxme ~]#
[root@linuxme ~]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
data_vg wz--n- 4.00m 3 1 0 329.99g 129.98g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s lv_data_mimage_0(0),lv_data_mimage_1(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme ~]#
[root@linuxme ~]# lvconvert -m 0 /dev/data_vg/lv_data /dev/sdb /dev/sdc
Logical volume lv_data converted.
[root@linuxme ~]#
[root@linuxme ~]# vgreduce data_vg /dev/sdb /dev/sdc
Removed "/dev/sdb" from volume group "data_vg"
Removed "/dev/sdc" from volume group "data_vg"
[root@linuxme ~]#这样就卸载完成了。
再查看逻辑卷的状态：
[root@linuxme ~]# vgdisplay -v data_vg | grep --color "PV Name"
Using volume group(s) on command line
Finding volume group "data_vg"
PV Name /dev/sde
[root@linuxme ~]#
[root@linuxme ~]# vgs -o +devices -v
Finding all logical volumes
VG Attr Ext #PV #LV #SN VSize VFree VG UUID Devices
data_vg wz--n- 4.00m 1 1 0 220.00g 120.00g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sde(0)
data_vg wz--n- 4.00m 1 1 0 220.00g 120.00g 322pOi-JSaV-EfoA-8PAg-rIMP-99Qt-4RhB5s /dev/sde(15360)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(0)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(12800)
vg_linuxme wz--n- 4.00m 1 3 0 299.51g 0 3vsEor-ICxs-93PP-Co8n-yqwl-ibNe-Zw58v1 /dev/sda2(74670)
[root@linuxme ~]#
[root@linuxme ~]# lvs -o +devices -v
Finding all logical volumes
LV VG #Seg Attr LSize Maj Min KMaj KMin Pool Origin Data% Meta% Move Copy% Log Convert LV UUID Devices
lv_data data_vg 2 -wi-a--- 100.00g -1 -1 253 3 hR4oLZ-XNHu-tx2z-EwKH-XFhx-862w-4klt73 /dev/sde(0)
lv_data data_vg 2 -wi-a--- 100.00g -1 -1 253 3 hR4oLZ-XNHu-tx2z-EwKH-XFhx-862w-4klt73 /dev/sde(15360)
lv_home vg_linuxme 1 -wi-ao-- 241.68g -1 -1 253 2 O5gF2z-0agB-w3fc-CZeA-lf4S-6Cfq-1h4iaU /dev/sda2(12800)
lv_root vg_linuxme 1 -wi-ao-- 50.00g -1 -1 253 0 z1Hk1n-QsD3-EgdU-MhCZ-INEf-alIo-o9UaiV /dev/sda2(0)
lv_swap vg_linuxme 1 -wi-ao-- 7.83g -1 -1 253 1 Cmk5On-Mwbz-bbbI-dNGT-D9j4-GCSD-YVRvAb /dev/sda2(74670)
[root@linuxme ~]#
————————————
Done。