how to check the boot disks are mirrrored

[gany59]

Hi folks..

shall we use lvlnboot command in a running server
to determine the boot disk is mirrored or not.
Is there nay other way to find whether the boot disk is mirrored or not.

[Pete Randall · Accepted solution]

# lvlnboot -v
Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c3t6d0 (10/0/15/1.6.0) -- Boot Disk
/dev/dsk/c3t5d0 (10/0/15/1.5.0) -- Boot Disk
Boot: lvol1 on: /dev/dsk/c3t6d0
/dev/dsk/c3t5d0
Root: lvol3 on: /dev/dsk/c3t6d0
/dev/dsk/c3t5d0
Swap: lvol2 on: /dev/dsk/c3t6d0
/dev/dsk/c3t5d0
Dump: lvol2 on: /dev/dsk/c3t6d0, 0


You could also look at lvdisplay output for the lvols in vg00, checking the mirror count.
"lvdisplay /dev/vg00/lvol?" should return mirror copies 1, for all the key lvols.


Pete

[Raj D.]

gany,
You can use :
# lvlnboot -v vg00
It wil show both the boot disk.

Also check:
# lvdisplay -v /dev/vg00/lvol3

You will see both the boot disk . You can check for all the lvs ( 1 to 9).

- Use setboot to check if the alternate diks boot path has been set.

- booting from the mirrored disk would be wise to verify the mirror, after it has been created.


Hth,
Raj.

[Torsten.]

As said, perform a

# lvdisplay -v /dev/vg00...

to see if a LVOL is mirrored.




Be aware your system can probably use a HARDWARE RAID too.

[Steven E. Protter]

shalom,

lvlnboot -v

Certainly does the job.

But if you want to REALLY be sure. Run a test and boot off the alternate disk.

SEP

[gany59]

hi folks

i heard from some thread that we are not suppose to run the lvlnboot command in the running server.. it will cause some impact like that.
is it true..

[Pete Randall]

With the -v option the command is perfectly safe. It simply queries and reports. See the man pages.


Pete

[Michael Steele_2]

Hi

RE: "...i heard from some thread that we are not suppose to run the lvlnboot command in the running server.. it will cause some impact like that..."

Total fabrication from a non HP-UX admin.

[Torsten.]

lvlnboot can not really harm, but lvrmboot can.


Thats why you should always know what you are doing (refer to man pages).

[Hakki Aydin Ucar]

In Addition you can check your license :
Mirroring requires the add-on product HP MirrorDisk/UX (B2491BA). This is an optional product available on the HP-UX 11i application release media. To confirm that you have HP MirrorDisk/UX installed on your system, enter the swlist command.
# swlist -l fileset | grep -i mirror
LVM.LVM-MIRROR-RUN B.11.23 LVM Mirror