extend an existing VG with dual controller path

[YLTan]

I have this setup on one of my vg32, I need to extend vg32 to double its size.
All my disk is in the same SAN with two controllers. I have allocated a new
lun for the extend and seen by server from the same set of controllers.

/dev/vg32
/dev/dsk/c4t6d2 --- primary path
/dev/dsk/c5t6d2 ---- alt link

New disk to be added in
/dev/dsk/c4t6d5
/dev/dsk/c5t6d5

Can some one advice the vgextend command and its option to extend vg32?

[RAC_1]

As a root execute following command.

vgextend /dev/vg32 /dev/dsk/c5t6d5 /dev/dsk/c4t6d5

Confirm with vgdisplay -v /dev/vg32

[G. Vrijhoeven · Accepted solution]

Hi,

Start with pvcreate ( on primary or alternate) and use vgextend primary alternate to add the disk.

Gideon

[YLTan]

how to specify which is primary and which is alt link? does vgextend knows how to handle this?

[G. Vrijhoeven]

Hi,

the first listed in vgextend is the primairy

Gideon

[Jean-Louis Phelix]

Hi,

My advise would be to use PVG (physical volume groups). Simply create a /etc/lvmpvg file like :

VG /dev/vg32
PVG prilink
/dev/dsk/c4t6d2
/dev/dsk/c4t6d5
PVG altlink
/dev/dsk/c5t6d2
/dev/dsk/c5t6d5

Regards.