PVG then mirroring

[Margaret Frank]

I am trying to mirror 30G that is currently on 3 10G drives. We have attached 2 15G drives. I need the data to specifically go to the new drives. I cannot mirror the data to the new drives specifically because I am going from 3 drives to 2 drives. Can this be done if a PVG group is created? How is that done?
Here is an example of what I have
vg01
/dev/dsk/c13t1d0
/dev/dsk/c13t1d1
I tried vgcreate -g emc /dev/dsk/c15t1d0 /dev/dsk/c15t1d1
then vgextend -g emc /dev/vg01 /dev/dsk/c15t1d2
then I tried lvextend -m 1 -s /dev/vg01/lvol1 emc
I get errors. I have removed the group emc with the hopes of finding out what I have done wrong to set this up correctly. Thank you for any information you can provide.

[hbhua_231]

hi,be sure you have create the correct /etc/lvmpvg file,try:

lvchange -s g /dev/vg01/lvol1
then
lvextend -m 1 /dev/vg01/lvol1

[TwoProc]

First,

$> vgextend /dev/vg01 /dev/dsk/c15t1d1 /dev/dsk/c15t1d2

Now you'll just need to create your mirrors.

$> lvextend -m 1 /dev/vg01/lvol1 /dev/dsk/c15t1d1 /dev/dsk/c15t1d2

When it's done, you should be working.

To see where you are while the above is running, from another shell prompt:

$> lvdisplay -v /dev/vg01/lvol1 | grep -i "Stale"

That will show you the next PE that's going to be mirrored in the lvol, and if you repeat running it, you'll see it progress along until complete.

[Sujit]

1) You need to add new disk (15GB) to VG01

#vgextednd /dev/vg01 /dev/dsk/c15t1d0 /dev/dsk/c15t1d1

After this there are 2 ways to do the mirroring Create PVG or mirror as we do with normal disk.

PVG :
2)Create /etc/lvmpvg file. For you it will look something like
VG /dev/vg01
PVG PVG0
/dev/dsk/c13t1d0
/dev/dsk/c13t1d1
Third_DISK
PVG PVG1
/dev/dsk/c15t1d0
/dev/dsk/c15t1d1
Save the file.
3) Now you need to just run lvextend cmd without specifying disk path. /etc/lvmpvg will take care of the disk.

# lvextend -m 1 /dev/vg01/lv_name

NORMAL Method;
4) Mirroe each LV by specifying pv_path.

# lvextend -m 1 /dev/vg01/lv_name pv_path

Sujit.

[Margaret Frank]

thank you for all of your help, however, I have 1 issue. I created the /etc/lvmpvg file as needed. However, when I try to mirror a copy of my data it is not going onto the disks in the new pvg group, but instead going onto disk that has available space.
I need to force the mirror copy to go onto the disk that is in the pvgroup. Does anyone know the syntax? I do not want to mirror from 1 disk to another, but instead from 1 lvol to available space that is is the new pv group.

[Margaret Frank]

I got it finally!! Thanks so much for all the help.