vgchange.1m (2010 10)

v
vgchange(1M) vgchange(1M)
Deactivate volume group /dev/vg03:
vgchange -a n /dev/vg03
Forced deactivation of volume group
/dev/vg03:
vgchange -a n -f /dev/vg03
Activate volume group /dev/vg03 using multiple parallel threads:
vgchange -a y -T /dev/vg03
Activate volume group /dev/vg03 without synchronizing extents that are not current on logical
volumes that have Mirror Write Cache turned on:
vgchange -a y -s /dev/vg03
Exclusive Activation
Set up volume group /dev/vg03 for use in a high availability cluster:
vgchange -a n /dev/vg03 # Deactivate volume group
vgchange -c y /dev/vg03 # Enable volume group for HA cluster
vgchange -c y -S y /dev/vg03 # Enable volume group for HA cluster
and mark as sharable
vgchange -a e /dev/vg03 # Activate volume group in exclusive mode
vgchange -a s /dev/vg03 # Activate volume group in shared mode
Activate all volume groups; activate those that are marked for membership in a high availability cluster
in shared mode:
vgchange -a y
Activate all volumes that are marked for membership in a high availability cluster in exclusive mode:
vgchange -a e
Cross Activation
Set up volume group /dev/sh_vg for use in a high availability cluster.
To make configuration changes, to a volume group activated in shared mode, deactivate the volume group
by executing the following command on each cluster node except one:
vgchange -a n sh_vg
On the single node, where the volume group is active:
vgchange -a e -x sh_vg # Change mode to exclusive
vgchange -a s -x sh_vg # After configuration change, change
# mode back to shared
Quiescing a Volume Group
Quiesce LVM metadata writes and application reads and writes to volume group /dev/vg03:
vgchange -Q rw /dev/vg03
Quiesce LVM metadata and application writes but allow application reads to volume group /dev/vg03:
vgchange -Q w /dev/vg03
Resume normal reads and writes to volume group /dev/vg03 (after having quiesced them earlier) :
vgchange -R /dev/vg03
Quiesce volume group /dev/vg03 quiescing both reads and writes and automatically resume normal
read/write access in 600 seconds:
vgchange -Q rw -t 600 /dev/vg03
WARNINGS
Ordinary Operation
In ordinary operation (that is, without the optional high availability software), it is possible to activate a
volume group for read-write access from more than one physically connected system, leading to a high
potential for data corruption. Therefore, if access is desired from more than one system to a single
volume group, it is important that only one system activate the volume group for read-write access; the
6 Hewlett-Packard Company − 6 − HP-UX 11i Version 3: October 2010