HP-UX Reference (11i v3 07/02) - 1M System Administration Commands N-Z (vol 4)

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pvchange(1M) pvchange(1M)

EXTERNAL INFLUENCES

Environment Variables

LANG determines the language in which messages are displayed.

If LANG is not speciﬁed or is null, it defaults to

C (see lang(5)).

If any internationalization variable contains an invalid setting, all internationalization variables default to

C (see environ(5)).

EXAMPLES

Prohibit the allocation of additional physical extents to a physical volume:

pvchange -x n /dev/dsk/c0t0d0

Allow the allocation of additional physical extents to a physical volume:

pvchange -x y /dev/dsk/c0t0d0

Only switch paths when the current path is unavailable. Do not switch back to a prior path which had

failed and has recovered, when the current path works:

pvchange -S n /dev/dsk/c0t0d0

Switch paths whenever a better path becomes available again after a failure, even if the current path is

ﬁne:

pvchange -S y /dev/dsk/c0t0d0

Manually switch a physical volume to use another controller path:

pvchange -s /dev/dsk/c2t0d2

Set the IO_timeout value for a physical volume to 60 seconds:

pvchange -t 60 /dev/dsk/c2t0d2

Set the IO_timeout value for a physical volume to zero (0) to use the driver default:

pvchange -t 0 /dev/dsk/c2t0d2

Change the (empty) physical volume to become a stand-by spare for the volume group:

pvchange -z y /dev/dsk/c2t0d2

Change the (active or stand-by) spare physical volume to become a regular member of the volume group:

pvchange -z n /dev/dsk/c2t0d2

Detach a path to a physical volume

pvchange -a n /dev/dsk/c2t0d2

Detach all the paths to a physical volume

pvchange -a N /dev/dsk/c2t0d2

Attach a path to a physical volume

pvchange -a y /dev/dsk/c2t0d2

The vgchange command may be used to attach all the physical volumes in a volume group and resume

automatically attaching the failed physical volumes.

vgchange -a y /dev/vg_work

WARNINGS

If the Mass Storage Subsystem multipath solution is enabled, the pvchange command options that are

link speciﬁc may not stop I/Os or switch links, as they did in earlier releases. This means that pvchange

-a n

, pvchange -s, and pvchange -S may not stop all I/Os on a given path. The scsimgr com-

mand should be used to disable the links.