Additional space added to SAN

[Juan Manuel Naranjo A.]

Hello, we are planning to add dpace to a SAN and assign that space to an existing Volume Group. The questions are:
- Is that possible or do we have to create a new Volume Group ?
- The added space will look like (at operating system level ) a new Phisical volume wich could be added to the existing volume Group ?
- Additional to taking backups of existing data and a vgexport what else do we have to do in odrer to assure the existing data ?
Note: The Vg to wich we are going to add the additional space is in a cluster and is shared between two(2) nodes

thanks a lot.

[whiz_kid]

Since you haven't mentioned anything about the storage, I assume that its an EVA.

Though you can practically increase the size of a vraid from EVA, hpux would not recognize the new size unless you destroy the vg and start recreating it right from from pvcreate which will destroy the data.


you could probably assign a new lun altogether to the server which could be bring under the same VG and increase the size using lvextend and extendfs/fsadm.

i dont think you need to take any backup or anything as its a straight forward method.

since its in a cluster setup, you have to present the luns to both the server and

a. do the vgextend, lvextend, extendfs/fsadm steps in one server
b. export the vgs in preview mode

c. and copy the map files to the second server

d. and do a vgexport and vgimport there to replicate the new changes across.

[Sandy Chen]

Hi,

- yes it is possible
- it will be a new physical disk that could be added to existing vg
- backup and vgexport of mapfile will be enough

regards,
Sandy