HP-UX 11.31 How to change root volume group name vg00
By Dusan Baljevic ()
a) Boot the server into LVM maintenance mode:
> boot vmunix -lm
b) Export root volume group:
# vgexport -s -m /vg00.map /dev/vg00
vgexport: Volume group "/dev/vg00" has been successfully removed.
c) Create new directory and group file for the root volume group.
Let's name it vgroot...
# mknod /dev/vgroot
# mknod /dev/vgroot/group c 64 0x010000
d) Import the map file from original vg00:
# vgimport -N -s -m /vg00.map vgroot
vgimport: Volume group "/dev/vgroot" has been successfully created.
Warning: A backup of this volume group may not exist on this machine.
Please remember to take a backup using the vgcfgbackup command after activating the volume group.
Also, upon first activation of an imported bootable volume group, make
sure to run lvlnboot(1M) command in recovery mode (-R option) to rsync the information on the disk.
e) Activate the new root volume group:
# vgchange -a y vgroot
Activated volume group.
Volume group "vgroot" has been successfully changed.
f) Check the status and make changes in LVM accordingly:
# lvlnboot -v
Boot Definitions for Volume Group /dev/vgroot:
Physical Volumes belonging in Root Volume Group:
/dev/disk/disk11_p2 -- Boot Disk
Boot: lvol1 on: /dev/disk/disk11_p2
Root: ??? on: /dev/disk/disk11_p2
Swap: ??? on: /dev/disk/disk11_p2
Dump: ??? on: /dev/disk/disk11_p2, 0
# lvrmboot -r vgroot
Volume Group configuration for /dev/vgroot has been saved in /etc/lvmconf/vgroot.conf
# lvlnboot -b /dev/vgroot/lvol1
Volume Group configuration for /dev/vgroot has been saved in /etc/lvmconf/vgroot.conf
# lvlnboot -r /dev/vgroot/lvol3
Volume Group configuration for /dev/vgroot has been saved in /etc/lvmconf/vgroot.conf
# lvlnboot -s /dev/vgroot/lvol2
Volume Group configuration for /dev/vgroot has been saved in /etc/lvmconf/vgroot.conf
If dump was part of primary swap (not in my case), one would need to run this as well:
# lvlnboot -d /dev/vgroot/lvol2
# lvlnboot -R /dev/vgroot
Volume Group configuration for /dev/vgroot has been saved in /etc/lvmconf/vgroot.conf
# lvlnboot -v
Boot Definitions for Volume Group /dev/vgroot:
Physical Volumes belonging in Root Volume Group:
/dev/disk/disk11_p2 -- Boot Disk
Boot: lvol1 on: /dev/disk/disk11_p2
Root: lvol3 on: /dev/disk/disk11_p2
Swap: lvol2 on: /dev/disk/disk11_p2
No Dump Logical Volume configured
# lvmadm -l
--- Version 1.0 volume groups ---
VG Name /dev/vgroot
PV Name /dev/disk/disk11_p2
g) We need to ensure that file system file uses new volume group name.
To get access to commands like vi(1M) or sed(1M):
# mount /dev/vgroot/lvol7 /usr
Just for fun, I did not use vi(1M) but sed(1M):
# sed -e 's/vg00/vgroot/g' /etc/fstab >/etc/fstab.new
# diff /etc/fstab /etc/fstab.new
3,10c3,10
< /dev/vg00/lvol3 / vxfs delaylog 0 1
< /dev/vg00/lvol1 /stand vxfs tranflush 0 1
< /dev/vg00/lvol4 /home vxfs delaylog 0 2
< /dev/vg00/lvol5 /opt vxfs delaylog 0 2
< /dev/vg00/lvol6 /tmp vxfs delaylog 0 2
< /dev/vg00/lvol7 /usr vxfs delaylog 0 2
< /dev/vg00/lvol8 /var vxfs delaylog 0 2
< /dev/vg00/lvol9 /var/tmp vxfs delaylog 0 2
---
> /dev/vgroot/lvol3 / vxfs delaylog 0 1
> /dev/vgroot/lvol1 /stand vxfs tranflush 0 1
> /dev/vgroot/lvol4 /home vxfs delaylog 0 2
> /dev/vgroot/lvol5 /opt vxfs delaylog 0 2
> /dev/vgroot/lvol6 /tmp vxfs delaylog 0 2
> /dev/vgroot/lvol7 /usr vxfs delaylog 0 2
> /dev/vgroot/lvol8 /var vxfs delaylog 0 2
> /dev/vgroot/lvol9 /var/tmp vxfs delaylog 0 2
# cp -p /etc/fstab.new /etc/fstab
# mount -a
mount: /dev/vgroot/lvol7 is already mounted on /usr
# bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 2097152 432552 1651696 21% /
/dev/vgroot/lvol7 12288000 3446528 8772480 28% /usr
/dev/vgroot/lvol8 14336000 2396872 11845920 17% /var
/dev/vgroot/lvol9 2097152 20501 1949796 1% /var/tmp
/dev/vgroot/lvol6 1048576 20816 1019736 2% /tmp
/dev/vgroot/lvol5 15368192 7992488 7318224 52% /opt
/dev/vgroot/lvol4 524288 20848 499512 4% /home
/dev/vgroot/lvol1 2097152 291696 1791408 14% /stand
# setboot -v
Primary bootpath : 1/0/1/1/0/1/1.0x6.0x0 (/dev/rdisk/disk11)
HA Alternate bootpath : 1/0/1/1/0/1/1.0x6.0x0 (/dev/rdisk/disk11)
Alternate bootpath : 0/0/0/3/0.0x5.0x0 (/dev/rdisk/disk7)
Autoboot is ON (enabled)
TEST CURRENT DEFAULT
------
all partial partial
SELFTESTS on on
early_cpu on on
late_cpu on on
FASTBOOT on on
Platform on on
Full_memory on on
Memory_init on on
IO_HW off off
Chipset on on
# swapinfo -tm
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 8192 0 8192 0% 0 - 1 64,0x000002
reserve - 2 -2
memory 19349 1679 17670 9%
total 27541 1681 25860 6% - 0 -
h) Reboot and enjoy using the server with new root volume group name:
# /usr/sam/lbin/vginfo -v
vgroot:available,read/write@:255:16:9:1:0:16:4329:69104:12224:764:4319:0:0:/dev/vgroot/lvol1@available/syncd@2048@128@1,/dev/vgroot/lvol2@available/syncd@8192@512@1,/dev/vgroot/lvol3@available/syncd@2048@128@1,/dev/vgroot/lvol4@available/syncd@512@32@1,/dev/vgroot/lvol5@available/syncd@15008@938@1,/dev/vgroot/lvol6@available/syncd@1024@64@1,/dev/vgroot/lvol7@available/syncd@12000@750@1,/dev/vgroot/lvol8@available/syncd@14000@875@1,/dev/vgroot/lvol9@available/syncd@2048@128@1:/dev/disk/disk11_p2@@available@4319@764::LVM