1、查看VG属性

root@rzcs:/#vgdisplay -v /dev/vg02

--- Volume groups ---

VG Name                     /dev/vg02

VG Write Access             read/write

VG Status                   available

Max LV                      2047

Cur LV                      2

Open LV                     2

Cur Snapshot LV             0

Max PV                      2048Cur PV                      2

Act PV                      2

Max PE per PV               4800

VGDA                        4

PE Size (Mbytes)            64

Unshare unit size (Kbytes)  1024

Total PE                    4800

Alloc PE                    4799

Current pre-allocated PE    0

Free PE                     1

Total PVG                   0

Total Spare PVs             0

Total Spare PVs in use      0

VG Version                  2.2

VG Max Size                 300gVG Max Extents              4800

Cur Snapshot Capacity       0p

Max Snapshot Capacity       300g

​可以看出，该VG最大只能300G，显然不能满足我们需求，此时即使使用vgextend扩展也无用，因此需要修改VG的最大大小“VG Max Size”

2、修改VG属性

命令和语法：

Usage:

For deactivated version 1.0 volume groups,

vgmodify

[-v]

[-n]

[-r]

[-e MaxPhysicalExtents]

[-p MaxPhysicalVolumes]

[-l MaxLogicalVolumes]

VolumeGroupName

vgmodify -B bootable

[-n]

[-r]

[-v]

[-e MaxPhysicalExtents]

[-p MaxPhysicalVolumes]

[-l MaxLogicalVolumes]

VolumeGroupName pv_path...

vgmodify -o

[-v]

[-r]

VolumeGroupName

vgmodify -o -B bootable

[-v]

[-r]

VolumeGroupName pv_path...

vgmodify -C DLC_Size

[-r]

VolumeGroupName pv_path

For activated version 1.0 volume groups,

vgmodify -a

[-v]

[-n]

[-r]

[-e MaxPhysicalExtents]

[-p MaxPhysicalVolumes]

[-l MaxLogicalVolumes]

VolumeGroupName

vgmodify -a -B bootable

[-n]

[-r]

[-v]

[-e MaxPhysicalExtents]

[-p MaxPhysicalVolumes]

[-l MaxLogicalVolumes]

VolumeGroupName pv_path...

vgmodify -a -o

[-v]

[-r]

VolumeGroupName

vgmodify -a -o -B bootable

[-v]

[-r]

VolumeGroupName pv_path...

vgmodify -a -E

[-o]

[-v]

[-r]

VolumeGroupName [pv_path...]

vgmodify -a -E

[-v]

[-r]

[-e MaxPhysicalExtents]

[-p MaxPhysicalVolumes]

[-l MaxLogicalVolumes]

VolumeGroupName [pv_path...]

vgmodify -a -C DLC_Size

[-r]

VolumeGroupName pv_path

To recover a physical volume from a previous online or offline vgmodify failure,

vgmodify -R conf_file VolumeGroupName pv_path ...

To display a table of optimized possible volume group settings for an activated or deactivated version 1.0 volume group,

vgmodify -t

[-v]

[-n]

VolumeGroupName

vgmodify -t -B bootable

[-v]

[-n]

VolumeGroupName pv_path...

For activated volume groups version 2.0 and higher,

vgmodify -a -E

[-r]

VolumeGroupName [pv_path ...]

vgmodify -a -C DLC_Size

[-r]

VolumeGroupName pv_path

vgmodify -a

[-E]

-S Max_VG_Size [-r] VolumeGroupName

我这里是2.2版本，因此使用如下命令：

root@rzcs:/#vgmodify -a -S 1024G /dev/vg02

再次查看，已经修改成功

root@rzcs:/#vgdisplay /dev/vg02

--- Volume groups ---

VG Name                     /dev/vg02

VG Write Access             read/write

VG Status                   available

Max LV                      2047

Cur LV                      2

Open LV                     2

Cur Snapshot LV             0

Max PV                      2048

Cur PV                      2

Act PV                      2

Max PE per PV               16384

VGDA                        4

PE Size (Mbytes)            64

Unshare unit size (Kbytes)  1024

Total PE                    11998

Alloc PE                    4799

Current pre-allocated PE    0

Free PE                     7199

Total PVG                   0

Total Spare PVs             0

Total Spare PVs in use      0

VG Version                  2.2

VG Max Size                 1t

VG Max Extents              16384

Cur Snapshot Capacity       0p

Max Snapshot Capacity       1t