HP-UX System Administrator's Guide: Logical Volume Management (762803-001, March 2014)

Table 16 Version 2.x Volume Group Limits
Maximum ValueDefault ValueMinimum ValueCommand to Set/Change
Parameter
Parameter
2048
1
n/a0n/aNumber of volume groups
on a system
511 (2.0)
2048 (2.1, 2.2)
511 (2.0)
2048 (2.1, 2.2)
511n/aNumber of physical volumes
in a volume group
511 (2.0)
2047 (2.1, 2.2)
2
511 (2.0)
2047 (2.1, 2.2)
511n/aNumber of logical volumes
in a volume group
2 PBn/a1 MB
3
vgcreate –S
max_vgsize
Size of a volume group
16 TBLUN Capacity1 PEpvcreate –s pv_sizeSize of a physical volume
256 TB00lvcreate –L lv_size
lvextend –L lv_size
Size of a logical volume
256 MBn/a1 MBvgcreate –s pe_sizeSize of a physical extent
256 MBn/a4 KBlvcreate –l
stripe_size
Size of a stripe
511n/a2lvcreate –i stripesNumber of stripes
3355443200lvcreate –l max_le
lvextend –l max_le
Number of logical extents
per logical volume
16777216LUN Capacity
÷ PE Size
1n/aNumber of physical extents
per physical volume
25500n/aNumber of snapshots per
logical volume (for volume
group Version 2.2 and
higher only)
4096KB1024KB512KBvgcreate -U
unshare_unit
Size of unshare unit for
snapshots (for volume group
Version 2.2 and higher only)
max_vgsizemax_vgsizemax_vgsizen/aMaximum snapshot capacity
(for volume group Version
2.2 and higher only)
500lvcreate –m copies
lvextend –m copies
Number of mirror copies
(MirrorDisk/UX product
required)
1
The limit of 2048 volume groups is shared among Version 2.x volume groups. Volume groups of Versions 2.x 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.
2
For volume group Version 2.2 or higher, the total number of logical volume includes normal logical volumes as well as
snapshot logical volumes.
3
If the total size of the specified physical volumes is larger than max_vgsize, vgcreate adjusts the minimum volume
group size to the total size.
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