vgimport problem

[Jolly Kalayil]

I have system A and b. System A is having vg name vg02 and system B is also. I wanted to Import vg02 on SYSTEM B but as different VG name. Is it possible ?

[RAC_1]

Yes, it is possible.

On system A
vgexport -pv -m /tmp/vg02.map -f /tmp/vg02.conf vg02
transfer the file /tmp/vg02.map and /tmp/vg02.conf to system B

On system B

mkdir /dev/vgxx (choose vg name as you want)
mkdir /dev/vgxx/group c 64 0x0y0000
oy-uniq minor id for your vg. Make sure it is not used anywhere in you configuration.

vgimport -pv -m /tmp/vg02.map -f /tmp/vg01.conf vgxx
If everything is OK, then

vgimport -pv -m /tmp/vg02.map -f /tmp/vg01.conf vgxx

[Tim Nelson]

Are you physically moving the disks from system A to system B ?

If so then you will have to get them out of system A's configs or system A will start complaining about the remove disk.
On system A.
dismount all lvols
vgchange -a n /dev/vg02
vgexport -m /tmp/vg02.map

copy /tmp/vg02.map to system B

On system B
mkdir /dev/vgabc
mkdnod /dev/vgabc/group c 64 0x##0000 ( ## some unique number lower than maxvgs setting in kernel, i.e. 0x050000)
vgimport -m /tmp/vg02.map /dev/vgabc /dev/dsk/cxtxdx /dev/dsk/cxtxdx

The example mentioned by RAC assumes that the device files are the same for the storage on system A and system B.


Also the -p switch on the vgimport will only execute in preview mode. Drop the -p in order to actually execute.

[Tim Nelson]

and the last couple steps so you can use the new vg

vgchange -a y /dev/vgabc

vgdisplay /dev/vgabc to check on everything.

then mount your filesystems as you wish.

[Torsten.]

Hi Jolly,

you can do this using the steps from above posting.
The argument "-p" is the preview option for both commands, in combination with vgexport it prevents the remove of that vg from this system. I guess you have to leave out this with vgimport.

Make sure that this vg is NOT activated by 2 hosts at the same time for write access.

[Torsten.]

PS: the "above posting" in my last reply refers to the first posting