vgextend

[Sridhar R]

Hi,

My Requirement is to move two PV’s belonging to two VG’s respectively to a single VG.

To be more clear,

PV -> /dev/dsk/c2t0d0 -> resides in /dev/vg01
PV-> /dev/dsk/c2t0d1 -> resides in /dev/vg02

Currently,

/dev/vg03 -> is having /dev/dsk/c2t0d2.

I want to add the above two PV’s to the vg03.

And for further info, all the 3 VG’s contain only one lvol in it.

I am using the below command sequence.

#lvremove –f /dev/vg01/lv01
#vgexport –s –m /tmp/vg01tmp /dev/vg01
#vgreduce /dev/vg01 /dev/dsk/c2t0d0
#lvremove –f /dev/vg02/lv02
#vgexport –s –m /tmp/vg02tmp /dev/vg02
#vgreduce /dev/vg02 /dev/dsk/c2t0d1
#vgextend /dev/vg03 /dev/dsk/c2t0d0 /dev/dsk/c2t0d1
#

Just let me know whether this sequence of commands will do or not.
If not, tell me what I have missed or what is wrong.

(Note: Not to worry about the data, as all the file systems doesn’t have any data)

Thanks in Advance!!

Sridhar

[Jeeshan]

Hi

>>#lvremove â f /dev/vg01/lv01
>>#vgexport â s â m /tmp/vg01tmp /dev/vg01
pvmove /dev/dsk/c2t0d2 /dev/dsk/c2t0d0
>>#vgreduce /dev/vg01 /dev/dsk/c2t0d0
>>#lvremove â f /dev/vg02/lv02

>>#lvremove â f /dev/vg02/lv02
>>#vgexport â s â m /tmp/vg02tmp /dev/vg02
pvmove /dev/dsk/c2t0d1 /dev/dsk/c2t0d2
>>#vgreduce /dev/vg02 /dev/dsk/c2t0d1

you can additionally reuce the pv using pvmove.

[Jeeshan · Accepted solution]

Hi

>>#lvremove â f /dev/vg01/lv01
>>#vgexport â s â m /tmp/vg01tmp /dev/vg01
pvmove /dev/dsk/c2t0d2 /dev/dsk/c2t0d0
>>#vgreduce /dev/vg01 /dev/dsk/c2t0d0
>>#lvremove â f /dev/vg02/lv02

>>#lvremove â f /dev/vg02/lv02
>>#vgexport â s â m /tmp/vg02tmp /dev/vg02
pvmove /dev/dsk/c2t0d1 /dev/dsk/c2t0d2
>>#vgreduce /dev/vg02 /dev/dsk/c2t0d1

you can additionally reduce the pv using pvmove.

[OFC_EDM]

If you don't care about the data then play away.

You could also blow away vg03 and then recreate as vg01 using all 3 disks.

If you're not going to recreate from scratch. Then after you vgextend vg03 you will still need to extend the lvol using lvextend.

Are these hfs or vxfs filesystems? (check fstab)

Use extendfs or fsadm to extend the filesystem.

If you don't have online JFS you'll have to unmount mountpoint(s) on the disk before you extend.

[OFC_EDM]

ahsan...after a pvmove he'll still have to extend the filesystem correct?

[Rasheed Tamton]

Hi,

vgexport /dev/vg01
vgexport /dev/vg02
pvcreate -f /dev/rdsk/c2t0d0
pvcreate -f /dev/rdsk/c2t0d1
vgextend /dev/vg03 /dev/dsk/c2t0d0 /dev/dsk/c2t0d1

Regards,
Rasheed Tamton.

[Jeeshan]

Hi O'kevin

>>...after a pvmove he'll still have to extend the filesystem correct?

yes.

[Sridhar R]

Thanks for all the replies!

[Sridhar R]

Thanks!