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

The number of physical extents in a volume group has an architectural limit, so your choice of
physical extent size affects the maximum size of the volume group. To display the maximum
volume group size for a given physical extent size, use the -E option to vgcreate with the -s
option. For example:
# vgcreate -V 2.0 -E -s 256
Max_VG_size=2p:extent_size=256m
Conversely, to display the minimum physical extent size for a given volume group size, use the
-E option to vgcreate with -S. For example:
# vgcreate -V 2.0 -E -S 2t
Max_VG_size=2t:extent_size=1m
For more information about Version 2.0 volume groups, see the white paper LVM 2.0 Volume
Groups in HP-UX 11i v3 described in “Related Documentation” (page 13).
lvmadm Command
This release introduces the lvmadm command, which displays the volume group limits shown
in Table 1 (page 6). For example, to show the Version 1.0 volume group limits, enter the
following:
# lvmadm -t -V 1.0
--- LVM Limits ---
VG Version 1.0
Max VG Size (Tbytes) 510
Max LV Size (Tbytes) 16
Max PV Size (Tbytes) 2
Max VGs 256
Max LVs 255
Max PVs 255
Max Mirrors 2
Max Stripes 255
Max Stripe Size (Kbytes) 32768
Max LXs per LV 65535
Max PXs per PV 65535
Max Extent Size (Mbytes) 256
For more information, see lvmadm(1M).
New and Changed Features in This Release 7