topic mirroring the boot disk and database disk in Operating System - HP-UX

mirroring the boot disk and database disk

Anil_6 — Thu, 27 Dec 2001 16:50:16 GMT

hi,

i have a primary boot disk that i need to mirror with a new hard disk and another disk which has the database. pls let me know of the steps involved.

regards

Re: mirroring the boot disk and database disk

Mark Greene_1 — Thu, 27 Dec 2001 17:02:16 GMT

man vgchange; you also need to have installed the MirrorDisk/UX software.

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mark

Re: mirroring the boot disk and database disk

Jeff Machols — Thu, 27 Dec 2001 17:02:51 GMT

1. Add the new disk to the vg00 volume group

2. Do an lvextend -m 1 lvol1 /dev/dsk/c0t0d0

just do this for each LV and use the name of yor new disk instead of c0t0d0

Re: mirroring the boot disk and database disk

Uday_S_Ankolekar — Thu, 27 Dec 2001 17:08:40 GMT

Hi,

Have a look this doc..

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=daaa75840f6735a6aa/screen=ckiDisplayDocument?docId=200000055534397

Goodluck,

-USA..

Re: mirroring the boot disk and database disk

A. Clay Stephenson — Thu, 27 Dec 2001 17:12:06 GMT

Don't overlook the fact that in order to get the full benefits (and better performance) from mirroring, your mirrors should be on a separate bus so that you can tolerate controller/cabling/terminator failures as well as disk failures. Ideally, you disks should also be hot-plug so that no downtime is needed for replacement. For this reason, I always avoid any internal disks that are not hot-plug.

Re: mirroring the boot disk and database disk

Krishna Prasad — Fri, 28 Dec 2001 15:33:41 GMT

First for the boot disk
When you add the disk you want to mirror you must use the command.

pvcreate -B /dev/rdsk/c#t#d#
mkboot -l /dev/dsk/c#t#d#
vgextend /dev/vg00 /dev/dsk/c#t#d#

lvextend -m 1 /dev/vg00/lvol## /dev/dsk/c#t#d#

The database disk is easier.

pvcreate /dev/rdsk/c#t#d#
vgextend /dev/vg## /dev/dsk/c#t#d#
lvextend -m 1 /dev/vg##/lvol## /dev/dsk/c#t#d#