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

mirror disk

TSYO — Wed, 03 Mar 2004 05:46:41 GMT

Hi,

I would like know what is the command to make a mirror disk. I don't need a synchronous vol, but a vol formed by a mirrorized disk.

Have I explained myself with clarity?

Thanks

Re: mirror disk

Jakes Louw — Wed, 03 Mar 2004 05:49:28 GMT

Hi

"lvextend -m 1 lv_path [pv_path....|pvg_name....]"

Do man on lvextend.

Re: mirror disk

David_246 — Wed, 03 Mar 2004 05:50:17 GMT

what Volume Mnagaement Software are you using?

Regs David

Re: mirror disk

G. Vrijhoeven — Wed, 03 Mar 2004 05:50:22 GMT

Hi,

If the disk is mirrored using lvm. ( MirrorUX) It is mirrored on logical volume level.

So lvdisplay /dev/vg??/lvol?? will give you info on the mirror status.

Mirror copies 1

HTH,

Gideon

Re: mirror disk

Stefan Farrelly — Wed, 03 Mar 2004 05:50:38 GMT

Im not sure what you mean but to create a mirror disk is easy;

1) locate a spare unused disk at least the same size as existing disk to be mirrored.
2) pvcreate -B it
3) mkboot it
4) add it to your VG
5) lvextend -m 1 each lvol to create the mirror.

You need the MIRROR/UX software installed to do this.

Re: mirror disk

G. Vrijhoeven — Wed, 03 Mar 2004 05:54:03 GMT

Hi,

Sorry,

lvcreate -m 1 /dev/vg0?/lvol is the command to add a mirror copy. lvdisplay is the command to view.

Gideon

Re: mirror disk

Fabio Ettore — Wed, 03 Mar 2004 05:54:29 GMT

Hi,

by using MirroDisk/UX it is logical volume-based. I mean that you should extend mirror on another disk for each logical volume:

# lvextend -m 1 /dev/vgXX/lvolX /dev/dsk/cYtYdY

Best regards,
Ettore

Re: mirror disk

TSYO — Wed, 03 Mar 2004 05:54:59 GMT

I have two new disks. I want make a mirror of them. I donÂ´t want "lvcreate -m1....".

Can i do this or I can only make a mirrorized lvol?

Thanks again

Re: mirror disk

Jakes Louw — Wed, 03 Mar 2004 05:56:13 GMT

You can only make mirrored LVOLs with LVM.

Re: mirror disk

Jakes Louw — Wed, 03 Mar 2004 05:57:31 GMT

However: you can do a dd to create a copy, but I need to understand your motives for this:

dd if=/dev/dsk/sourcedisk of=/dev/dsk/destinationdisk bs=1024k

Re: mirror disk

TSYO — Wed, 03 Mar 2004 06:02:41 GMT

Ops...

I wanted it to be able to create volumenes without worrying to select the option to me of the mirror.

On this host several people works. It is necessary to control that they did not create volumenes without mirrror.

Thank you very much by your aid.

Re: mirror disk

Mark Grant — Wed, 03 Mar 2004 06:03:24 GMT

No, you can only mirror on a logical volume basis. This is not a limitation, it makes for things being much more flexible.