topic Re: Mirroring in Operating System - HP-UX

Mirroring

Prakash.D — Thu, 17 May 2007 10:29:14 GMT

Hi stuffs,

i am new to hpux but i have an idea about all thos basics but urgently i need steps to create a disk mirroring and it is not a boot disk,

Ecpecting your results soon,

Re: Mirroring

Paul Senior_1 — Thu, 17 May 2007 10:35:51 GMT

I assume you have mirrordisk installed:-

swlist | grep -i mirrordisk

lvextend is the command to use to create mirrors:-

lvcreate -m

usually you would put the mirror on a different controller to improve redundancy further.

Re: Mirroring

Paul Senior_1 — Thu, 17 May 2007 10:37:24 GMT

above entry should read

lvextend -m

Re: Mirroring

Steven E. Protter — Thu, 17 May 2007 10:38:36 GMT

Shalom,

Correction to earlier command.

lvextend -m 1

That is all that need to be done if the logical volume already exists.

Note that LVM Mirror/UX is an optional product that must be paid for.

Aside: Hi Stuffs, what does that mean?

SEP

Re: Mirroring

spex — Thu, 17 May 2007 10:39:14 GMT

Hello,

I assume you wish to set up software mirroring, in which case, your first step is to purchase Mirrordisk/UX, which adds functionality to LVM commands.

Then, for command specifics, see â Adding a Mirror to a Logical Volumeâ from the HP-UX SysAdmin Guide:

http://docs.hp.com/en/5991-6481/ch03s03.html#lvm.admin.addmirror

Basically, you add an '-m 1' option to 'lvcreate' or 'lvextend' after configuring the new physical volume.

PCS

Re: Mirroring

Babu A — Thu, 17 May 2007 13:30:31 GMT

Make sure you have installed MirrorUX into the system. Assuming that you are using LVM, the following command can be used for mirroring.

Example:

To mirror a Logical Volume lvol1 in Volume group VG01 to the Physical Disk c10t4d0. Before executing pvcreate make sure that the disk is not used in any other volume groups.

# pvcreate /dev/rdsk/c10t4d0
# vgextend /dev/vg01 /dev/dsk/c10t4d0
# lvextend -m1 /dev/vg01/lvol1 /dev/dsk/c10t4d0

Babu