lvsplit.1m (2010 09)

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lvsplit(1M) lvsplit(1M)

(Requires Optional HP MirrorDisk/UX Software)

n Do not back up conﬁguration changes this time.

-g PhysicalVolumeGroup

The ofﬂine logical volumes will be created using the mirror copies on the phy-

sical volumes in the speciﬁed PhysicalVolumeGroup.

-s suffix Specify the sufﬁx to use to identify the new logical volume. The new logical

volume name has the form lv_path sufﬁx.If

-s is omitted, sufﬁx defaults to

as in lv_path

Shared Volume Group Considerations

For volume group version 1.0 and 2.0,

lvsplit cannot be used if the volume group is activated in

shared mode. For volume groups version 2.1 (or higher),

lvsplit can be performed when activated in

either shared, exclusive, or standalone mode.

Note that the

lvmpud daemon must be running on all the nodes sharing a volume group activated in

shared mode. See lvmpud (1M).

When

lvsplit is issued, it creates the new logical volume device special ﬁles on all the nodes sharing

the volume group. The device special ﬁles are created with the same name on the nodes sharing the

volume group.

When a node wants to share the volume group, the user must ﬁrst execute a

vgimport

if logical volumes

were split at the time the volume group was not activated on that node.

The logical volumes device special ﬁles should have the same name on all the nodes sharing the volume

group.

LVM shared mode is currently only available in Serviceguard clusters.

EXTERNAL INFLUENCES

Environment Variables

LANG determines the language in which messages are displayed.

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

Split the mirrored logical volume

/dev/vg00/lvol1

into two copies. Call the new logical volume

/dev/vg00/lvol1backup

lvsplit -s backup /dev/vg00/lvol1

Split the mirrored logical volume /dev/vg00/lvol1

into two copies. The ofﬂine logical volume will be

created using the mirror copy on the physical volumes contained in the physical volume group

pvg1.

lvsplit -g pvg1 /dev/vg00/lvol1

Split an online logical volume which is currently mounted on /usr so that a backup can take place:

lvsplit /dev/vg00/lvol1

fsck /dev/vg00/lvol1b

mount /dev/vg00/lvol1b /usr.backup

Perform a backup operation, then:

umount /usr.backup

lvmerge /dev/vg00/lvol1b /dev/vg00/lvol1

Split two logical volumes at the same time:

lvsplit /dev/vg01/database1 /dev/vg01/database2

Perform a backup operation on the split logical volumes, then rejoin them:

lvmerge /dev/vg01/database1b /dev/vg01/database1

lvmerge /dev/vg01/database2b /dev/vg01/database2