topic Re: Mirroring.... in Operating System - HP-UX

Mirroring....

Kyu-Yong Kwon — Mon, 07 Nov 2005 23:22:17 GMT

Dear all
There are 4 New Disk. The disk are listed as below:
c1t8d0, c10t8d0
c1t11d0, c10t11d0

I wish
c1t8d0 and c10t8d0 <-- mirroring
c1t11d0 and c10t11d0 <-- mirroring

and I want to make a new volumne group. (/dev/vg13/lvol1)

plea.se tell me whether composition is possible
I am sorry, but wished to record command.

Re: Mirroring....

RAC_1 — Mon, 07 Nov 2005 23:45:55 GMT

c1t8d0 and c10t8d0 <-- mirroring - vg00
c1t11d0 and c10t11d0 <-- mirroring -- vg13

This is fine. Depending upon what OS(which version) is, the mirroring procedure will vary. Particularly with 11.23, it is a bit different.

Re: Mirroring....

AwadheshPandey — Mon, 07 Nov 2005 23:48:30 GMT

Hello Kyu,

See attached file. it will help u to all in LVM.

Awadhesh

Re: Mirroring....

Devender Khatana — Tue, 08 Nov 2005 01:01:19 GMT

Hi

There is no problem in getting this done.

Follow these steps after finding out the disk space using "diskinfo -v /dev/rdsk/c1t8d0" &
"diskinfo -v /dev/rdsk/c1t11d0"

#pvcreate /dev/rdsk/c1t8d0 ( Repeat for other three disks)
#mkdir /dev/vg13
#mknod /dev/vg13/group c 64 0x??0000

(Where ?? is the next unique no. available on your box. Find out by listing existing by "ll /dev/*/group")

#vgcreate -e 10000 -s 32 /dev/vg13 /dev/dsk/c1t8d0 /dev/dsk/c10t8d0 /dev/dsk/c1t11d0 /dev/dsk/c10t11d0

For the mirroring to be lying on exact disks specify disk devices in lvcreate and lvextend like this.
#lvcreate -L xxxx /dev/vg13 /dev/dsk/c1t8d10

Where xxxx is the LVOL size in MBs. Repeat same if XXXX is less than full space available on disk /dev/dsk/c1t8d0 for other LVOLs but the total space should not extend size of /dev/dsk/c1t8d10

Now for LVOLs to be created on other disk define that disk as aggument to lvcreate
#lvcreate -L xxxx /dev/vg13 /dev/dsk/c10t11d0

here xxxx is the LVOL size in MBs. Repeat same if XXXX is less than full space available on disk /dev/dsk/c1t8d0 for other LVOLs but the total space should not extend size of /dev/dsk/c10t11d10

While create copy of the disk define second disk in pair as option to lvextend

#lvextend -m 1 /dev/vg13/lvol1 1/dev/dsk/c10t8d0

Repeat for other LVOLs on this disk. Then do the same for other pair of disks.

#lvextend -m 1 /dev/vg13/lvol? /dev/dsk/c1t11d0

And repeat same for other LVOLs on this disk.

A better option I would suggest in this scenario will be to use to use DISTRIBUTED allocation also alongwith strict allocation policy.

HTH
Devender

Re: Mirroring....

Adisuria Wangsadinata_1 — Tue, 08 Nov 2005 03:33:14 GMT

Hi,

Since you would like to add the disks into single lvol, it's not possible to have a configuration like you want to. The possible way is :

[c1t8d0 plus c1t11d0]
will be mirror with
[c10t8d0 plus c10t11d0]

So below is the steps :

1. create the /dev/vg30/lvol1 with /c1t8d0 first, can use SAM for this

2. create a physical volume using pvcreate for other disks (c10t8d0, c1t11d0 and c10t11d0) :

# pvcreate -f /dev/rdsk/c10t8d0
# pvcreate -f /dev/rdsk/c1t11d0
# pvcreate -f /dev/rdsk/c10t11d0

3. vgextend the rest of the disks : c10t8d0, c1t11d0 and c10t11d0

# vgextend /dev/30 /dev/dsk/c10t8d0
# vgextend /dev/30 /dev/dsk/c1t11d0
# vgextend /dev/30 /dev/dsk/c10t11d0

4. create a mirror copies for /dev/vg30/lvol1 :

# lvextend -m 1 /dev/vg30/lvol1 /dev/dsk/c1t11d0 /dev/dsk/c10t11d0

Once you finished this, the disks (c1t8d0 plus c1t11d0) will be mirrored with the disks (c10t8d0 plus c10t11d0).

Hope this information can help you.

Cheers,
AW

Re: Mirroring....

Kyu-Yong Kwon — Tue, 08 Nov 2005 21:42:00 GMT

Thank you so much..
Solved problem by your help..