topic Re: mirroring issue in Operating System - HP-UX

mirroring issue

hpuxhelp — Wed, 18 Dec 2002 17:49:53 GMT

how i determine if the o/s was mirrored ?
will lvdisplay show this?

Re: mirroring issue

Tom Danzig — Wed, 18 Dec 2002 17:52:40 GMT

Yes. Look at the line "Mirror copies"

i.e.
Mirror copies 1

Re: mirroring issue

Pete Randall — Wed, 18 Dec 2002 17:53:01 GMT

Yes lvdisplay will show you the number of mirror copies - if it's not 0, you're mirrored.

Pete

Re: mirroring issue

Mark Greene_1 — Wed, 18 Dec 2002 17:59:22 GMT

If the disks are mirrored, you can verify the integrity of the mirror like this:

lvdisplay -v /dev/vg00/lvol*|grep "stale"

If all is well, this won't return anything; otherwise you'll see the partitions that have gone stale. If you have any, look through the syslog for any disk and/or IO related errors.

HTH
mark

Re: mirroring issue

Jac Kersing — Thu, 19 Dec 2002 09:43:38 GMT

lvdisplay will show if the logical volumes are mirrored, NOT if the boot area has been mirrored as well which might be handy if you want to be able to boot the system when the primary disk failed.

Run:

if [ -f /etc/lvmtab ] then boot=`lvlnboot -v 2>&1 | awk '/Boot Disk/ {print $1} '` else boot=`mount | awk '/^\/ / { print $3 }'` fi for i in $boot do boot2=`echo $i|sed "s/s[0-9].*/s6/p"|sed "s/dsk/rdsk/p"|grep rdsk` echo "\n" diskinfo $boot2 | fold echo "\n--- LIF contents of $i ---\n" lifls -l $i echo "\n--- LIF AUTO boot string of $i ---\n" lifcp $i:AUTO - echo "\n" done

The output should contain '--- LIF AUTO boot string of ' twice if the system is bootable from the mirror as well.