Expand the existing LUN size on EVA3000

[Chui Kock You_1]

Hi,

I have a HP EVA3000 San Storage which has 2 LUN allocated with 200GB on HP RP7420 system and 300GB on N4000 system. The 1st LUN has been presented to a HP RP7420 system which is running on HPUX 11i version 1. I wish to increase the partition size from 200GB to 500GB on one of the partitions on the HP RP7420 system, which has the 200GB of the disk space allocated to it by the EVA3000 previously. The RP7420 and N4000 system is running on hpux cluster.

The 2nd LUN has been presented to a HP N4000 system, which is running on HPUX 11i version 1. I which to delete the 2nd LUN which has 300GB and them unpresent it from the EVA command view. Can i expand the 1st LUN thru the EVA command view? Will it corrupt the data after the LUN expansion?

Can i see the new LUN size on the hpux os?

Regards
Chui

[Kapil Jha · Accepted solution]

I am not sure about EVA, but I have done this on EMC and it took new lun size automatically.
If i remember correct I just did a vgscan.

Well its always better to have LUNs with small size 500GB lun would be huge, so as per me its better if you would allocate this 300G as separtae LUN rather than incraseing it.

BR,
Kapil+

[Torsten.]

With 11.11 you cannot extend the VG that way. You need to delete the VG and LVs, extend the LUN and recreate VG and LUNs.


Better to create a new vdisk and extend the VG.

[Chui Kock You_1]

Hi Kapil,

Thank for the help. I will try get the information from the storage team.

Hi Torsten,

Before i start to expand the LUN, i need to do the full database backup on the cluster package and them restore back into new partition.

From the hp research website, the vgmodify can work on hpux 11i v2 & v3. Can i used the vgmodify to extend the existing vg on 11i v1 ?

[Duncan Edmonstone]

no, you missed the point... don't expand the existing LUN, just create new ones and add them into the existing volume group using vgextend.

HTH

Duncan

[Kapil Jha]

Yeh...and vgmodify does not work on 11v1.
And yeh......its better to add new LUN and don expand it.

BR,
Kapil+

[Johnson Punniyalingam]

Create New LUN -> Present-> to Host
than follow by -> Don't Expand , No

#ioscan -fn
#ioscan -fnC disk
# pvcreate -f /dev/rdsk/cxtxd -> new luns
# vgextemd /dev/vgxx /dev/dsk/cxtxdx -> new luns

[Emil Velez]

Using vgmodify and expanding luns is a feature that will be available at 11iv2 (11.23).

[Chui Kock You_1]

Hi All,

Thank for the help.

Regards
Chui