HP-UX Reference (11i v1 00/12) - 1M System Administration Commands N-Z (vol 4)
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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man1m/naaagt.1m
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p
pvchange(1M) pvchange(1M)
y Allow allocation of additional physical extents on the physical volume.
This is the default.
n Prohibit allocation of additional physical extents on the physical
volume. However, logical volumes residing on the physical volume
are accessible.
-t IO_timeout Set IO_timeout for the physical volume to the number of seconds indicated. An
IO_timeout value of zero (0) causes the system to use the default value supplied
by the device driver associated with the physical device. IO_timeout is used by
the device driver to determine how long to wait for disk transactions to complete
before concluding that an IO request can not be completed (and the device is
offline or unavailable).
-z sparepv This option requires the installation of the optional HP MirrorDisk/UX software.
It allows you to change the physical volume specified by pv_path into a spare
physical volume for its volume group, or change the specified spare physical
volume back into a regular physical volume for this volume group. No physical
extents from a spare physical volume will be available as part of the "free" pool of
extents in the volume group. A spare physical volume will only be used in the
event that another physical volume within this volume group becomes unavail-
able (fails). sparepv can have one of the following values:
y Change the specified physical volume to be a "stand-by" spare for its
volume group. The specified physical volume must not have extents
allocated on it (i.e., no logical volumes residing on it) at the time this
command is issued. A stand-by spare physical volume will only be
used in the event of a failure of another physical volume -- prior to
such a failure, no logical volume is allowed to reside on it.
n Change the specified spare physical volume back into a regular physi-
cal volume. If the physical volume was a stand-by spare, then all of
the disk space associated with it will be immediately available for use
by logical volumes. If the physical volume is an "active" spare, that is,
it was previously a stand-by spare but then took over for a failed phy-
sical volume, it will simply mark the physical volume as a regular
member of its volume group and the logical volumes residing on it will
remain unchanged.
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
Manuallyswitch a physical volume to use another controller path:
Section 1M−−654 − 2 − HP-UX Release 11i: December 2000
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