topic Re: hpux parameter in Operating System - HP-UX

hpux parameter

Ionut Grigorescu_2 — Mon, 28 Oct 2002 16:42:31 GMT

Hi,

I have checked an AUTO file on the boot disk (copy with lifcp to /tmp/AUTO then more /tmp/AUTO) and I have found:
hpux lq
I couldn't find in the manpage what is lq - can you explain it to me?

Re: hpux parameter

A. Clay Stephenson — Mon, 28 Oct 2002 16:50:10 GMT

hpux -lq ....

instructs the OS to ignore disk quorum for vg00 when activating the volume group. Normally, more than 50% of the disks which comprise a volume group must be available before a volume group can be activated. Typically in mirrored boot disk configurations, vg00 consists of two disk. If one of these is dead then only 50% of the disks are available; -lq says ignore this and continue. It should be set on both boot disks in a mirrored boot configuration. It is set using the mkboot -a command.

Re: hpux parameter

Hai Nguyen_1 — Mon, 28 Oct 2002 16:50:47 GMT

lq stands for Low Quorum which allows you to boot off a mirrored boot disk independently when the primary boot disk fails to boot.

Hai

Re: hpux parameter

S.K. Chan — Mon, 28 Oct 2002 16:53:38 GMT

Having "hpux -lq" as your boot strings allow you to bootup your system without quorum check. A quorum check will fail if half or more out of the total number of disks in a volume group fails. So for example if you got 2 disks in your root VG (mirrored), if one disk failed, your system will not be able to boot up "automatically" if you do not have the escape quorum boot string (hpux -lq).

Re: hpux parameter

Ken Hubnik_2 — Mon, 28 Oct 2002 16:54:21 GMT

If you are mirroring the root disk than it is a good practice to have -lq option in there. It is for low quorom and will allow a boot on the secondary root mirror in case primary fails.

Re: hpux parameter

S.K. Chan — Mon, 28 Oct 2002 16:55:15 GMT

As for the manpage ..
# man vgchange
Take a look at "-q quorum" section. It tells you you can change the activation behavior of your VG. The quorum requirement is enforced by default.