68.2. 卷组管理（Volume Group）

# vgcreate vg1 /dev/sdb4
  Volume group "vg1" successfully created
			

# vgdisplay
  --- Volume group ---
  VG Name               vg1
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.02 TiB
  PE Size               4.00 MiB
  Total PE              267301
  Alloc PE / Size       10239 / 40.00 GiB
  Free  PE / Size       257062 / 1004.15 GiB
  VG UUID               Kxd02t-mFtJ-nThA-Lciy-zI2A-Dwzq-2nJoVh
			

# vgs
  VG   #PV #LV #SN Attr   VSize VFree
  vg1    1   1   0 wz--n- 1.02t 1004.15g
			

激活卷组

# vgchange -a y vg1
			

vgextend vg1 /dev/sdb3
			

# vgdisplay
  --- Volume group ---
  VG Name               vg1
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.02 TiB
  PE Size               4.00 MiB
  Total PE              267301
  Alloc PE / Size       10239 / 40.00 GiB
  Free  PE / Size       257062 / 1004.15 GiB
  VG UUID               Kxd02t-mFtJ-nThA-Lciy-zI2A-Dwzq-2nJoVh

# vgs
  VG   #PV #LV #SN Attr   VSize VFree
  vg1    1   1   0 wz--n- 1.02t 1004.15g

# vgextend vg1 /dev/sdb3
  No physical volume label read from /dev/sdb3
  Physical volume "/dev/sdb3" successfully created
  Volume group "vg1" successfully extended

# vgdisplay
  --- Volume group ---
  VG Name               vg1
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               1.51 TiB
  PE Size               4.00 MiB
  Total PE              395303
  Alloc PE / Size       10239 / 40.00 GiB
  Free  PE / Size       385064 / 1.47 TiB
  VG UUID               Kxd02t-mFtJ-nThA-Lciy-zI2A-Dwzq-2nJoVh

# vgs
  VG   #PV #LV #SN Attr   VSize VFree
  vg1    2   1   0 wz--n- 1.51t 1.47t

  # pvdisplay
  --- Physical volume ---
  PV Name               /dev/sdb4
  VG Name               vg1
  PV Size               1.02 TiB / not usable 4.90 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              267301
  Free PE               257062
  Allocated PE          10239
  PV UUID               g2xLQ8-7tgm-iNZc-8dVq-vo3z-CFJp-LryYAs

  --- Physical volume ---
  PV Name               /dev/sdb3
  VG Name               vg1
  PV Size               500.01 GiB / not usable 1.12 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              128002
  Free PE               128002
  Allocated PE          0
  PV UUID               77RRJm-e4iz-Zfos-ZYHT-XEBa-AZ7D-Yd7fdU

			

# vgreduce vg1 /dev/sdb3
  Removed "/dev/sdb3" from volume group "vg1"

# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sdb4
  VG Name               vg1
  PV Size               1.02 TiB / not usable 4.90 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              267301
  Free PE               257062
  Allocated PE          10239
  PV UUID               g2xLQ8-7tgm-iNZc-8dVq-vo3z-CFJp-LryYAs

  "/dev/sdb3" is a new physical volume of "500.01 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb3
  VG Name
  PV Size               500.01 GiB
  Allocatable           NO
  PE Size               0
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               77RRJm-e4iz-Zfos-ZYHT-XEBa-AZ7D-Yd7fdU