mirroring

[M. Tariq Ayub]

I want to mirror with lvm. The OS is HP-UX 11.0. It has two internal disk c3t5d0 and c3t6d0. OS is running from c3t6d0

I am writing the procedures please verify.

pvcreate -f -B /dev/rdsk/c3t5d0
vgextend /dev/vg00 /dev/dsk/c3t5d0

mkboot -l /dev/dsk/c3t5d0

mkboot -a “hpux” /dev/rdsk/c3t5d0

lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c3t5d0
lvextend -m 1 /dev/vg00/lvol2 /dev/dsk/c3t5d0
lvextend -m 1 /dev/vg00/lvol3 /dev/dsk/c3t5d0

lvlnboot -r /dev/vg00/lvol3
lvlnboot -b /dev/vg00/lvol1
lvlnboot -s /dev/vg00/lvol2
lvlnboot -d /dev/vg00/lvol2

setboot -a 8/16/5.6.0


lvlnboot -v


lvextend -m 1 /dev/vg00/lvol4 /dev/dsk/c3t5d0
lvextend -m 1 /dev/vg00/lvol5 /dev/dsk/c3t5d0
lvextend -m 1 /dev/vg00/lvol6 /dev/dsk/c3t5d0
lvextend -m 1 /dev/vg00/lvol7 /dev/dsk/c3t5d0
lvextend -m 1 /dev/vg00/lvol8 /dev/dsk/c3t5d0
lvextend -m 1 /dev/vg00/lvol9 /dev/dsk/c3

[Senthil Kumar .A_1]

Hi Tariq,

Your procedure looks good for me..

Please refer to the following URL..particularly last response from Geoff Wild ....

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=627341

[Steven E. Protter · Accepted solution]

36 of 254 Point assignment. Please improve.

Here is a copy of my guide on the subject:

pvcreate -B /dev/rdsk/c1t0d0 #use real disk

mkboot -l /dev/rdsk/c1t0d0
mkboot -a "hpux -lq (;0)/stand/vmunix" /dev/rdsk/c1t0d0 # use real disk


# mkboot -b /usr/sbin/diag/lif/updatediaglif -p ISL -p AUTO -p HPUX -p PAD -p LABEL /dev/rdsk/c?t?d?

If you are running 64-bit OS:

# mkboot -b /usr/sbin/diag/lif/updatediaglif2 -p ISL -p AUTO -p HPUX -p PAD -p LABEL /dev/rdsk/c?t?d?


vgextend /dev/vg00 /dev/dsk/c1t0d0 # same thing
lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c1t0d0

# real disk. repeat for other lvols

lvlnboot -r /dev/vg00/lvol3 # root fs /
lvlnboot -s /dev/vg00/lvol2 #swap
lvlnboot -d /dev/vg00/lvol2 #swap/dump
lvlnboot -b /dev/vg00/lvol1
lvlnboot -R
lvlnboot -v
setboot
setboot -a 52.1.0 # second disk

36 of 254 Point assignment. Please improve.

Suggestion:
http://forums1.itrc.hp.com/service/forums/pageList.do?userId=CA879853&listType=unassigned&forumId=1

SEP

[Cem Tugrul]

Hi Tarig,
As an addition to replies,
XIII) How to create a mirrored boot disk

Note the following example is using the disk c1t6d0 as the
mirrored boot disk and c0t6d0 as the boot disk.

1) Initialize the disk and make it bootable
pvcreate -B /dev/rdsk/c1t6d0
Note: the -B parameter tell pvcreate that this will be a
bootable disk.
2) Add the physical volume to the volume group
vgextend /dev/vg01 /dev/dsk/c1t6d0
3) Use mkboot to place the boot utilities in the boot area and add
the AUTO file.
mkboot /dev/dsk/c1t6d0
mkboot -a "hpux -lq" /dev/rdsk/c1t6d0
4) Use mkboot to update the AUTO file on the primary boot
disk.
mkboot -a "hpux -lq" /dev/rdsk/c0t6d0
5) Mirror the stand, root and swap logical volumes
lvextend -m 1 /dev/vg00/lvol1
lvextend -m 1 /dev/vg00/lvol2
lvextend -m 1 /dev/vg00/lvol3
Note: LVM will resynchronize the new mirror copies. This step will
takes several minutes

Repeat the lvextend for all other logical volumes on the boot
mirror.
6) Modify your alternate boot path to point to the mirror copy of the
boot disk.
setboot -a 8/8.6.0 # Use the Hardware path for your new
boot disk.

[Suraj Singh_1]

Hi,

Before proceeding for actual mirroring, make sure that you hace Mirror/UX license.

# swlist|grep -i mirror

REgards

[M. Tariq Ayub]

setboot -a 8/8.6.0

Will it replace My existing boot disk or It will add the second disk in boot list. Ie after this command from where the OS will be boot. Primary or the new secondary?

[Cem Tugrul]

Hi,
will add the second disk to boot disks.
When you finish then run the command;
#lvlnboot -v
for to check your boot disks information...
For example from my ux-box;
newhr:/#lvlnboot -v
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c1t2d0 (0/0/1/1.2.0) -- Boot Disk
/dev/dsk/c2t2d0 (0/0/2/0.2.0) -- Boot Disk
Boot: lvol1 on: /dev/dsk/c1t2d0
/dev/dsk/c2t2d0
Root: lvol3 on: /dev/dsk/c1t2d0
/dev/dsk/c2t2d0
Swap: lvol2 on: /dev/dsk/c1t2d0
/dev/dsk/c2t2d0
Dump: lvol2 on: /dev/dsk/c1t2d0, 0

My boot disk was /dev/dsk/c1t2d0
and i have mirrored my second disk /dev/dsk/c2t2d0
above the steps...
On the other hand,With succesfully finished
mirroring you can easily decide booting from
which disks because they are mirrored...

Good Luck,

[KVK]

It won't replace your primary boot disk path
You just entering the alternate boot path . In case of the system can't find a primary boot path it will go ahead to the alternate disk in system boot

[Devender Khatana]

Hi,

Apart from

#mkboot -a "hpux -lq (;0)/stand/vmunix" /dev/rdsk/c3t5d0

I would suggest this for primary disk as well so that in absence of your alternate disk it is able to boot from primary.

#mkboot -a "hpux -lq (;0)/stand/vmunix" /dev/rdsk/c3t6d0

And also check that it is set for both disks by

#lifcp /dev/rdsk/c3t5d0:AUTO -
#lifcp /dev/rdsk/c3t6d0:AUTO -

HTH,
Devender