topic Re: 2 disk mirror test in Operating System - HP-UX

2 disk mirror test

KCS_1 — Tue, 18 Jun 2002 03:37:04 GMT

Hi everyone!!
I have two disk mirrored.
first time, I wanna mirror test on hpux11.0.
Do you know what is good method for test it?

Re: 2 disk mirror test

RikTytgat — Tue, 18 Jun 2002 03:48:16 GMT

Hi,

When I have to demo mirrored disk at a customers site, I usually remove 1 of the disks and show the effect by using the lv* commands. These show the stale physical extents and stuff.

Afterwards, you re-insert the mirror disk and sync it with the command vgsync.

Bye,
Rik

Re: 2 disk mirror test

MANOJ SRIVASTAVA — Tue, 18 Jun 2002 03:59:54 GMT

Hi Patrick

It depends on the disk types , if they are hot swappable then you can just remove one of them and check that the fielssytem is still fine , thought iot wills how the mirrored PV msiing and stale . In case they are not then you can shut down the system and remove the PV and check the same

Manoj Srivastava

Re: 2 disk mirror test

Michael Tully — Tue, 18 Jun 2002 04:00:44 GMT

Hi,

If the disks is mirrored to a non-boot volume unlike vg00, you could do an lvsplit and lvmerge, to make sure that one or both sets are working. If it is the 'vg00' group, you do a boot set off the secondary disk. Only other test could be actually removing the disk, but you may not be in a postion to perform this
type of test.

Michael

Re: 2 disk mirror test

S.K. Chan — Tue, 18 Jun 2002 04:04:54 GMT

If you have access to the disk, unplugging the mirrored disk is a good way to test. You would see at the end of a "vgdisplay -v vgXX" that the "PV Status" of the disk is unavailable. Of course after you've unplugged it you would want test all the mounted FS on this VG to make sure the data are still intact. If this is a boot disk you're testing, the best way is to change you bootpath to the mirrored disk using "setboot" command and reboot the system so that it boots up from the mirrored disk.