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

mirror disks

Sami Aqel — Thu, 06 Jan 2005 00:29:56 GMT

How can i be sure that data is written on both mirrored disks ?

What commands are used to know the bootable disk(s)? and wether it is right configured or not.

Re: mirror disks

Sanjay Kumar Suri — Thu, 06 Jan 2005 00:33:37 GMT

#lvlnboot -v

Above command is for finding out mirror boot disks.

sks

Re: mirror disks

Ranjith_5 — Thu, 06 Jan 2005 00:45:57 GMT

Hi Sami,

I.)
==========

#lvdisplay /dev/vgxx/ will give you the following output.

G Name /dev/vg01
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 1
Open LV 1
Max PV 16
Cur PV 1
Act PV 1
Max PE per PV 10239
VGDA 2
PE Size (Mbytes) 4
Total PE 10238
Alloc PE 10238
Free PE 0
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use

In this if you have any mirror copies you can see that value of mirror copyies is >0. If it is showing 1 there is a mirror copy , if the value is 2 there are 2 mirror copies of this disk. You can also see the lv is lying on which all pvs.
=====================================================================
II.)
======
#lvlnboot -R /dev/vg00 - Ensure BDRA and LIFs are Sync'ed

#lvlnboot -v /dev/vg00 - Veryfy BDRA configuration

Re: mirror disks

Ranjith_5 — Thu, 06 Jan 2005 00:48:29 GMT

Correction from last post. 0 points for this:-
===================

In this if you have any mirror copies you can see that value of mirror copies is >0. If it is showing 1 there is a mirror copy , if the value is 2 there are 2 mirror copies of that volume. You can also see the lv is lying on which all pvs

regards,
Syam

Re: mirror disks

Bharat Katkar — Thu, 06 Jan 2005 00:57:05 GMT

Hi,

1. # lvlnboot -v
For looking out Boot Disk
2. # lvdisplay /dev/vg00/lvol3 | grep Mirror | awk '{ print $2 }'

If this returns 0 then no mirror copies otherwise the number indicates the mirror copies.

Hope that helps.
Regards,

Re: mirror disks

Sami Aqel — Thu, 06 Jan 2005 01:05:58 GMT

Thanks