REgarding mirring

[nandam]

Hi

Could you please tell me how to check system is on mirring or not

[spex]

Hi,

# lvdisplay -v /dev/vgxx/lvoly | more

If "Mirror copies" > 1, the LV is mirrored.

PCS

[James R. Ferguson]

Hi Nandam:

If you are referring to LVM mirroring, that's done at the logical volume level.

A 'lvdisplay' (e.g. 'lvdisplay /dev/vg00/lvol1') will list "Mirror copies". A value of one or two indicates that that logical volume is mirrored. Adding the '-v' switch to the command will show you on which physical volumes the mirrors reside and whether or not they are synchronized or not.

Regards!

...JRF...

[spex]

That should be, if "Mirror copies" > 0...

PCS

[Patrick Wallek]

The first thing is to check and see if you have the MirrorDisk/UX software installed.

# swlist -l bundle |grep -i mirror
B2491BA B.11.11 MirrorDisk/UX


Then check all of your LV's and see what the mirror copy is set to.

# lvdisplay /dev/vg00/lvol1 | grep -i mirror
Mirror Copies 1

If the "mirror copies" line comes back as 0, then it is not mirrored. If it is 1 or 2, then it is mirrored.

You must remember that mirroring is done at the logical volume level and NOT at the disk or VG level.

[Jaime Bolanos Rojas.]

Nandam

lvdisplay -v on the logical volume and then you piped that to more it will show you something like this
lvdisplay -v /dev/vg00/lvol3
--- Logical volumes ---
LV Name /dev/vg00/lvol3
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 0
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 1536
Current LE 192
Allocated PE 192
Stripes 0
Stripe Size (Kbytes) 0
Bad block off
Allocation strict/contiguous
IO Timeout (Seconds) default

Where is says mirrored copies, it should say 1, in this case it says 0 which means is not mirrored.

Remember that in hp-ux you mirror logical volumes and not disks, that's why the lvdisplay command.

Regards,

Jaime.

[Pupil_1]

if you are asking about the root disk then the command can also be
lvlnboot -v

If you see more than PV, then the root disk is mirrored.

This does not work for any other VG!

[Steven E. Protter]

Shalom,

The key fact besides the presence of Mirror/ux is you will see two copies or more in your lvdisplay -v output.

lvlnboot -V

That will tell you if you have mirrored the boot disk.

Mirror procedure, in case you find you are not mirrored and wish to proceed.


pvcreate -B /dev/rdsk/c1t0d0 #use real disk

mkboot -l /dev/rdsk/c1t0d0
mkboot -a "hpux -lq (;0)/stand/vmunix" /dev/rdsk/c1t0d0 # use real disk


# mkboot -b /usr/sbin/diag/lif/updatediaglif -p ISL -p AUTO -p HPUX -p PAD -p LABEL /dev/rdsk/c?t?d?

If you are running 64-bit OS:

# mkboot -b /usr/sbin/diag/lif/updatediaglif2 -p ISL -p AUTO -p HPUX -p PAD -p LABEL /dev/rdsk/c?t?d?


vgextend /dev/vg00 /dev/dsk/c1t0d0 # same thing
lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c1t0d0

# real disk. repeat for other lvols

lvlnboot -r /dev/vg00/lvol3 # root fs /
lvlnboot -s /dev/vg00/lvol2 #swap
lvlnboot -d /dev/vg00/lvol2 #swap/dump
lvlnboot -b /dev/vg00/lvol1
lvlnboot -R
lvlnboot -v
setboot
setboot -a 52.1.0 # second disk

SEP

[Fabian Briseño]

you could also check the easy way via SAM
disk and filesystems->logical volumes

and there you should see if a mirror exist

[Sajjad Shafi]

That is how i check my miriroing is upto date or not

LC=`/etc/lvdisplay -v /dev/vg0?/lvol* |grep -c stale`
if [ $LC -gt 0 ]; then
echo ""
echo "Disk Mirroring is Broken"
else
echo ""
echo "Disk Mirroring is Ok"
fi

[Sp4admin]

Hi nandam,

Look like Steven answerd your question.

You can do alvdisplay on a logical volume and it should show if it mirrored.

#lvdisplay /dev/vg00/lvol1
--- Logical volumes ---
LV Name /dev/vg00/lvol1
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 1
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 184
Current LE 46
Allocated PE 92
Stripes 0
Stripe Size (Kbytes) 0
Bad block off
Allocation strict/contiguous
IO Timeout (Seconds) default


sp,