Displaying LVM Information

To display information about volume groups, logical volumes, or physical volumes, use one of three commands. Each command supports the -v option to display detailed output and the -F option to help with scripting.

Information on Volume Groups

Use the vgdisplay command to show information about volume groups. For example:

# vgdisplay -v vg01
-- Volume groups --
VG Name                     /dev/vg01
VG Write Access             read/write
VG Status                   available
Max LV                      255
Cur LV                      1
Open LV                     1
Max PV                      16
Cur PV                      1
Act PV                      1
Max PE per PV               1016
VGDA                        2
PE Size (Mbytes)            4
Total PE                    508
Alloc PE                    508
Free PE                     0
Total PVG                   0
Total Spare PVs             0
Total Spare PVs in use      0
VG Version                  1.0
VG Max Size                 1082g
VG Max Extents              69248

-- Logical volumes --
LV Name                     /dev/vg01/lvol1
LV Status                   available/syncd
LV Size (Mbytes)            2032
Current LE                  125
Allocated PE                508
Used PV                     1

-- Physical volumes --
PV Name                     /dev/disk/disk42
PV Status                   available
Total PE                    508
Free PE                     0
Autoswitch                  On
Proactive Polling           On

Use the vgdisplay command to verify whether the LVM configuration in memory has problems. If the LVM configuration is working properly, there are no error messages, and the display shows the following:

The status is available (or available/exclusive for Serviceguard volume groups).
All the physical volumes are active; that is, the current number of physical volumes (Cur PV) is equal to number of active physical volumes (Act PV).
All the logical volumes are open; that is, Cur LV is equal to Open LV.

Information on Physical Volumes

Use the pvdisplay command to show information about physical volumes. For example:

# pvdisplay -v /dev/disk/disk47
-- Physical volumes --
PV Name                     /dev/disk/disk47
VG Name                     /dev/vg00
PV Status                   available
Allocatable                 yes
VGDA                        2
Cur LV                      9
PE Size (Mbytes)            4
Total PE                    1023
Free PE                     494
Allocated PE                529
Stale PE                    0
IO Timeout (Seconds)        default
Autoswitch                  On
Proactive Polling           On

-- Distribution of physical volume --
LV Name            LE of LV  PE for LV
/dev/vg00/lvol1    25        25
/dev/vg00/lvol2    25        25
/dev/vg00/lvol3    50        50

--- Physical extents ---
PE   Status   LV                 LE
0000 current  /dev/vg00/lvol1    0000
0001 current  /dev/vg00/lvol1    0001
0002 current  /dev/vg00/lvol1    0002
...
1021 free                        0000
1022 free                        0000

If the physical volume is functioning properly, Stale PE is 0.

Information on Logical Volumes

Use the lvdisplay command to show information about logical volumes. For example:

# lvdisplay -v /dev/vg00/lvol1
-- Logical volumes --
LV Name                     /dev/vg00/lvol1
VG Name                     /dev/vg00
LV Permission               read/write
LV Status                   available/syncd
Mirror copies               0
Consistency Recovery        MWC
Schedule                    parallel
LV Size (Mbytes)            100
Current LE                  25
Allocated PE                25
Stripes                     0
Stripe Size (Kbytes)        0
Bad block                   off
Allocation                  strict/contiguous
IO Timeout (Seconds)        default

-- Distribution of logical volume --
PV Name            LE on PV  PE on PV
/dev/disk/disk42   25        25

-- Logical extents --
LE   PV1                PE1  Status 1
0000 /dev/disk/disk42   0000 current
0001 /dev/disk/disk42   0001 current
0002 /dev/disk/disk42   0002 current

Displaying LVM Information

Technical documentation

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Information on Volume Groups

Information on Physical Volumes

Information on Logical Volumes