HPUX 11.31 lvm2

Wow LVM2 found in HPUX 11.31 has lifted a lot of burdensome limits on volume groups.  vgcreate automatically creates the  device group file; VGs are only limited by the MAX VG size you specify when creating the VG, using the -S option; hitting the max VG size is the only case where a backup/recreate/restore is needed.  Here's a list of helpful commands:

LVMP_CONF_PATH_NON_BOOT  found in /etc/lvmrc  (in March 2010 release)  allows lvm2 vg configuration file backups to an alternate location because of the large size of VG 2.X backups

lvmadm - (-t) displays limits of LVM1 and LVM2 VG 1.0 and VG 2.0 and up;  (-l) also lists the contents of /etc/lvmtab and lvmtab_p

lvmadm -l

--- Version 1.0 volume groups ---

VG Name /dev/vg00

PV Name /dev/disk/disk3_p2

        /dev/disk/disk2_p2

--- Version 2.1 volume groups ---

VG Name /dev/vgXX

PV Name /dev/disk/diskXXX

convert from legacy to persistent DSF: use vgdsf

/usr/contrib/bin/vgdsf –c vgXX

vgcreate using the new LVM2 VG2.0+ notation:

vgcreate -V 2.1 -s 16 -S 4t vgXXX /dev/disk/diskxxx /dev/disk/diskxxx

convert from VG1.0 to VG2.0+

The -r does a "review" to make sure the VG can be converted.

vgversion -V 2.1 -r vgXX

before the convert will run the VG has to be deactivated:

vgchange -a n vgXX

vgversion -V 2.1 vgXX

ioscan new options for persistent dsfs:

ioscan -m dsf /dev/disk/disk127

Persistent DSF           Legacy DSF(s)

========================================

/dev/disk/disk127        /dev/dsk/c5t5d0

                         /dev/dsk/c6t5d0