Red Hat GLOBAL FILE SYSTEM 5.0, Руководство администратора

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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
lvm.conf
so that this command will avoid scanning specific
physical volumes. For information on using filters to control which devices are scanned, see
Section 6, “Controlling LVM Device Scans with Filters” .
2.3. Preventing Allocation on a Physical Volume
You can prevent allocation of physical extents on the free space of one or more physical
volumes with the
pvchange
command. This may be necessary if there are disk errors, or if you
will be removing the physical volume.
The following command disallows the allocation of physical extents on
/dev/sdk1
.
pvchange -x n /dev/sdk1
You can also use the
-xy
arguments of the
pvchange
command to allow allocation where it had
previously been disallowed.
2.4. Resizing a Physical Volume
If you need to change the size of an underlying block device for any reason, use the
pvresize
command to update LVM with the new size. You can execute this command while LVM is using
Preventing Allocation on a Physical Volume
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