break mirror for PA and IA servers

[hpux_sun]

hi,

can you please tell me how to break the mirror disk for PA-RISC and Itanium based servers.

also how to merge the Lvols for the same.

[UVK]

have you tried using lvsplit and lvmerge before ?

[hpux_sun]

i haven't work on lvsplit and lvmerge , can you please provide me procedure?

[Steven E. Protter]

Shalom,

See these procedures:

http://unixbites.blogspot.com/2011/02/how-to-break-mirror-with-two-identical.html

http://www.maulvi.net/2009/06/02/hpux-breaking-mirror-and-extending-lvm/

On the off chance you are using VxVM to manage your root disk:

http://www.hpux.ws/?cat=7

vxbrk_mirror

SEP

[Arunabha Banerjee]

Before you break the mirror PLEASE verify (with both disk mirrored) that you can boot up from the 2ndary mirrored disk as well as primary mirrored disk. Just change the boot path accordingly. Basically we just want to make sure both disks boots up fine.

Now the steps...

Assuming c1t2d0 is primary mirrored disk & c2t2d0 is the 2ndary mirrored disk

Assuming (lvol1=/stand;lvol2=primary swap;lvol3=/;lvol4->lvol8 representing the rest of root's FS)

To break the mirror..

# lvreduce -m 0 /dev/vg00/lvol2 /dev/dsk/c2t2d0

# lvreduce -m 0 /dev/vg00/lvol1 /dev/dsk/c2t2d0

# lvreduce -m 0 /dev/vg00/lvol3 /dev/dsk/c2t2d0

==> Repeat for the rest of the lvols.

# vgreduce vg00 /dev/dsk/c2t2d0

# lvlnboot -v

==> Just checking. c2t2d0 should be out.

Change boot path ..

# setboot

=> Display boot path.

# setboot -p 0/0/2/0.2.0

=> Change primary boot path to c2t2d0

# setboot

=> Check again.

Now you can do your activity and reboot the server if you want shutdown -ry now

For PA

After it comes up .. re-do the mirroring process ..

# pvcreate -f -B /dev/rdsk/c1t2d0

# mkboot -l /dev/rdsk/c1t2d0

=> Create boot track (place boot utilities in boot area), -l means treat device as LVM disk.

# mkboot -a "hpux -lq" /dev/rdsk/c1t2d0

=> Add AUTO file in boot LIF area, "lq" option is to bypass quorum check.

=> Repeat for primary disk (c2t2d0) as well.

# lifcp /dev/rdsk/c1t2d0:AUTO -

=> Check content of AUTO file. Repeat for primary disk (c1t2d0).

# vgextend /dev/vg00 /dev/dsk/c1t2d0

=> Adding disk to root VG.

# pvdisplay -v /dev/dsk/c1t2d0

=> Note of the order of LVs (assuming it's lvol1,lvol2,lvol3,lvol4->lvol8)

# lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c1t2d0

=> Repeat for lvol2->lvol8

# lvlnboot -r /dev/vg00/lvol4 /dev/vg00

# lvlnboot -b /dev/vg00/lvol1 /dev/vg00

# lvlnboot -s /dev/vg00/lvol2 /dev/vg00

# lvlnboot -d /dev/vg00/lvol2 /dev/vg00

# lvlnboot -R /dev/vg00

=> Update BDRA (root, boot, swap and dump)

# lvlnboot -v

=> Check to make sure both disks are listed for root, boot and swap definition.

# setboot

=> Display boot path an set the boot path to the desired path with "setboot -a|-p"

For IA

# idisk -Rw /dev/rdsk/c1t2d0
# vi /tmp/pdf
3
EFI 500MB
HPUX 100%
HPSP 400MB
# idisk -f /tmp/pdf -w /dev/rdsk/c1t2d0
# idisk /dev/rdsk/c1t2d0
# insf -e -H 0/0/0/0.1.0
# insf -eCdisk
# efi_fsinit -d /dev/rdsk/c1t2d0s1
# pvcreate -fB /dev/rdsk/c1t2d0s2
# vgextend /dev/vg00 /dev/dsk/c1t2d0s2
# mkboot -e -l /dev/rdsk/c1t2d0
# efi_ls -d /dev/rdsk/c1t2d0s1
# lifls -l /dev/rdsk/c1t2d0s2
# efi_cp -d /dev/rdsk/c2t2d0s1 -u /EFI/HPUX/AUTO /tmp/prim
# echo "boot vmunix -lq" > ./AUTO
# efi_cp -d /dev/rdsk/c1t2d0s1 ./AUTO /efi/hpux/auto
# efi_cp -d /dev/rdsk/c1t2d0s1 -u /EFI/HPUX/AUTO /tmp/mir
# for lvol in lvol1 lvol2 lvol3 lvol4 lvol5 lvol6 lvol7 lvol8
> do
> lvextend -m 1 /dev/vg00/$lvol /dev/dsk/c0t1d0s2
> done

# lvlnboot -r /dev/vg00/lvol4 /dev/vg00

# lvlnboot -b /dev/vg00/lvol1 /dev/vg00

# lvlnboot -s /dev/vg00/lvol2 /dev/vg00

# lvlnboot -d /dev/vg00/lvol2 /dev/vg00

# lvlnboot -R /dev/vg00

# lvlnboot -v

=> Check to make sure both disks are listed for root, boot and swap definition.

# setboot

=> Display boot path an set the boot path to the desired path with "setboot -h|-p"

.