HP-UX Logical Volume Manager and MirrorDisk/UX Release Notes (September 2008)

Table 1 LVM Volume Group Version Limits
Version 2.1
Volume Groups
Version 2.0
Volume Groups
Version 1.0
Volume Groups
2048
*
512
*
256Maximum number of
volume groups on a system
2048511255Maximum number of
physical volumes in a
volume group
2047511255Maximum number of
logical volumes in a volume
group
16 TB16 TB2 TBMaximum size of a physical
volume
2048 TB2048 TB510 TBMaximum size of a volume
group
256 TB256 TB16 TBMaximum size of a logical
volume
256 MB256 MB256 MBMaximum size of a physical
extent
256 MB256 MB32 MBMaximum size of a stripe
511511255Maximum number of
stripes
335544323355443265535Maximum number of
logical extents per logical
volume
167772161677721665535Maximum number of
physical extents per
physical volume
0–50–50–2Number of mirror copies
(MirrorDisk/UX product
required)
*
The limit of 2048 volume groups is shared between Version 2.0 and Version 2.1 volume groups.
Volume groups of both versions can be created with volume group numbers ranging from 0-2047.
However, the maximum number of Version 2.0 volume groups that can be created is 512.
You can display the volume group limits with the lvmadm command.
Boot Disk Configuration Self-Healing
If the device special file for your LVM boot disk changes because its hardware path changed,
LVM scans for the boot disk during the boot process. After successfully booting, LVM
automatically updates the LVM configuration files /etc/lvmtab and /etc/lvmtab_p, as well
as the LVM metadata on each bootable disk in the root volume group, with the new boot path
so that future system boots will not need to scan. This behavior is configurable, and is enabled
by default. To disable it, edit /etc/lvmrc and change the AUTO_BOOT_MIGRATE flag to 0.
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