HP-UX 11i v3 LVM New Features in HP-UX 11i v3 (September 2009)

9
boot or vice versa.
pvcreate(1M) for the
-B option. Also see the LVM Volume Group Dynamic LUN expansion
The
vgmodify command enables you to change a physical volume type from boot to non-
See vgmodify(1M) and
(DLE)/vgmodify whitepaper.
g a physical volume non-bootable increases the space available on that device for LVM
configuration data. However, to take advantage of the additional space, you must mark every disk in a volume
Starting with the HP-UX 11i v3 September 2009 release, you can change the configuration of an active shared
s stay available on all
nge -x option, the SLVM SNOR feature to change
the configuration of a shared volume group, while keeping it active only on a single node. Using this procedure,
in available during the volume group reconfiguration.
(OLR) feature provides the following new methods for replacing or isolating path
s to a physical
replacing disks in an active
ire deactivating the volume group, modifying the volume group
gnostics against them.
sing
pvchange -a N command, in order to
perform an online disk replacement, is still supported. The behavior is the same for both legacy and
ith previous releases.
roup, the
pvchange - a
, use the scsimgr
sical volume paths. For more information, see scsimgr(1M).
Note that makin
group non-bootable.
SLVM Online Reconfiguration
volume group in a cluster without deactivating the volume group on any node. Application
nodes sharing the volume group. This applies to Version 2.1 and higher volume groups.
For Version 1.0 and 2.0 volume groups, you can use the vgcha
applications on at least one node rema
For more information, see the
SLVM Online Reconfiguration whitepaper.
LVM Device Online Replacement (OLR)
The LVM Online Disk Replacement
components or LVM disks within an active volume group:
• Using
-n and -N options with pvchange command, you can detach a specific path or all path
volume, respectively. LVM OLR enables you to follow a simpler procedure for
volume group. The procedure does not requ
configuration, or moving any user data.
• Using LVM OLR, you can easily isolate troublesome paths or disks to allow running dia
In HP-UX 11i v3, the option of detaching an entire physical volume u
persistent DSFs and is compatible w
Unless native multipathing is disabled and only legacy DSFs are configured for the volume g
n
command does not stop I/O operations for that path as they did in earlier releases. Instead
command with the disable option to disable phy
For more information, see the LVM Online Disk Replacement (LVM OLR)
whitepaper.
Volume Group Quiesce and Resume
The LVM volume group Quiesce/Resume feature allows quiescing I/O operations to the disks in a volume group
to facilitate creating a consistent snapshot of an otherwise active volume group for backup purposes. This feature
works with backup management and disk array management software to enable them to create a consistent
snapshot of the disks that make up an LVM volume group.
The Quiesce/Resume feature prevents the disk images from changing and allows a snapshot of the disks to be
taken without having to unmount or close the open logical volumes and deactivate the volume group.
The
vgchange command provides new options -Q and -R to allow quiescing the volume group prior to creating a
snapshot and to resume the volume group afterward. Optionally, both reads and writes or just writes to the
volume group can be quiesced.