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5.2.2. Displaying Physical Volumes
There are three commands you can use to display properties of LVM physical volumes:
pvs, pvdisplay, and pvscan.
The
pvs command provides physical volume information in a configurable form, displaying one line per physical volume. The pvs command provides a great deal of format control, and is useful for scripting. For information on using the pvs command to customize your output, see Section 5.8, “Customized Reporting for LVM”.
The
pvdisplay command provides a verbose multi-line output for each physical volume. It displays physical properties (size, extents, volume group, and so on) in a fixed format.
The following example shows the output of the
pvdisplay command for a single physical volume.
# pvdisplay
--- Physical volume ---
PV Name /dev/sdc1
VG Name new_vg
PV Size 17.14 GB / not usable 3.40 MB
Allocatable yes
PE Size (KByte) 4096
Total PE 4388
Free PE 4375
Allocated PE 13
PV UUID Joqlch-yWSj-kuEn-IdwM-01S9-XO8M-mcpsVe
The
pvscan command scans all supported LVM block devices in the system for physical volumes.
The following command shows all physical devices found:
# pvscan
PV /dev/sdb2 VG vg0 lvm2 [964.00 MB / 0 free]
PV /dev/sdc1 VG vg0 lvm2 [964.00 MB / 428.00 MB free]
PV /dev/sdc2 lvm2 [964.84 MB]
Total: 3 [2.83 GB] / in use: 2 [1.88 GB] / in no VG: 1 [964.84 MB]
You can define a filter in the
/etc/lvm/lvm.conf file so that this command will avoid scanning specific physical volumes. For information on using filters to control which devices are scanned, see Section 5.5, “Controlling LVM Device Scans with Filters”.
