HP Logical Volume Manager (LVM)

Commonly used LVM procedures

Create a new volume group, logical volume and filesystem

pvcreate /dev/rdsk/c0t1d0
mkdir /dev/vg01
mknod /dev/vg01/group c 64 0×010000
vgcreate /dev/vg01 /dev/dsk/c0t1d0
lvcreate -L 2000 /dev/vg01
newfs -F vxfs -o largefiles /dev/vg01/rlvol1
mkdir /ora_data01
mount /dev/vg01/lvol1 /ora_data01
Create a stripped filesystem

lvcreate -i 3 -I 32 -L 24 -n lvol1 /dev/vg01

-i number of stripes
-I stripe size of 32KB
-L size of the volume

Mirror root and swap disk

pvcreate -B /dev/rdsk/c0t6d0
vgextend /dev/vg00 /dev/dsk/c0t6d0
mkboot /dev/rdsk/c0t6d0
mkboot -a “hpux -lq” /dev/rdsk/c0t6d0
mkboot -a “hpux -lq” /dev/rdsk/<primary disk>
lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c0t6d0
lvextend -m 1 /dev/vg00/lvol2 /dev/dsk/c0t6d0
lvextend -m 1 /dev/vg00/lvol3 /dev/dsk/c0t6d0
lvextend ……..all other volumes on primary disk

setboot -a 8/8.6.0

replace a non-mirrored disk

lvreduce -m 0 -A n /dev/vg01/lvol1 /dev/dsk/cxtxdx
vgreduce vg01 /de/dsk/cxtxdx
or
pvchange -a N /dev/dsk/cxtxdx (if you have online replacement disks)

vgcfgrestore -n /dev/vgXX /dev/rdsk/cxtxdx
vgchange -a y /dev/vgXX
newfs -F <fstype> /dev/vgXX/rlvolx
mount <mountpoint>

Notes:
Make sure you have /etc/lvmconf/vgXX.conf
vgcfgbackup is run automatically
Defective disk was not mirrored before it failed
replace a mirrored disk

vgcfgrestore -n /devvgXX /dev/rdsk/cxtxdx
vgchange -a y /dev/vgXX
vgsync /dev/vgXX

Notes:
Defective disk was mirrored before it failed
replace mirrored boot disk

vgcfgrestore -n /dev/vg00 /dev/rdsk/cxtxdx
vgchange -a y /dev/vg00
vgsync /dev/vg00
mkboot /dev/rdsk/cxtxdx
mkboot -a “hpux -lq” /dev/rdsk/cxtxdx
shutdown -r -y 0

Notes:
Confirm that you have /etc/lvmconf/vg00.conf
Defective disk was mirrored before it failed

export and import a volume group

System One:
vgchange -a n /dev/vg01
vgexport -v -m /tmp/mapfile -s /dev/vg01
rcp /tmp/mapfile <system 2>:/tmp/mapfile

System two:
mkdir /dev/vg01
mknod /dev/vg01/group c 64 0xyy0000
vgimport -v -m /tmp/mapfile -s /dev/vg01
vgchange -a y /dev/vg01
mkdir /ora_data01
mount /dev/vg01/ora_data01 /ora_data01
extend VxFS file ssytem using onlineJFS lvextend -L 800 /dev/vg01/lvol1
fsadm -F vxfs -b 800M /ora_data01
change a logical volume to support largefiles fsadm -F vxfs -o largefiles /dev/vg01/rlvol1
display the boot area lifls -Clv /dev/dsk/c0t6d0
display boot information lvlnboot -v /dev/vg00
display all disks in the system ioscan -funC disk
make a dump device lvchange -C y /dev/vg00/dump (makes it contiguous)
lvlnboot -d /dev/vg00/dump
display dump devices lvlnboot -v

 

HP LVM

Author: WladyX on 22 April, 2009
Category: General, HP-UX
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