topic Re: increase disk size - online in Operating System - OpenVMS

increase disk size - online

Jiri Koutnik — Thu, 07 Sep 2006 09:39:18 GMT

Hi,
I have got DSA1: with 2 members. Need to increase size from 10 to 20GB.
Disk is mounted /system.
disk are built on EVA5000.
Does anybody know the best way to do it ?
I mean without Dismount :-)
running VMS 7.3-2

thanx Jiri

Re: increase disk size - online

Ian Miller. — Thu, 07 Sep 2006 10:22:09 GMT

is the expansion size limit (in SHOW DEV/FULL) larger than or equal to 20Gb?

Re: increase disk size - online

Ian Miller. — Thu, 07 Sep 2006 10:25:14 GMT

Re: increase disk size - online

Ian Miller. — Thu, 07 Sep 2006 10:28:13 GMT

and
http://h71000.www7.hp.com/doc/732FINAL/aa-pv5mh-tk/00/00/89-con.html

Re: increase disk size - online

Jan van den Ende — Thu, 07 Sep 2006 13:03:52 GMT

Jiri,

depends on HOW it was INITed.
INIT since some time supports the /LIMIT qualifier (max value 125G * clustersize, absolute max 1T ) which defines how big your "disk" can grow. Introduced because "disks" on SAN are just "a chunk of diskspace presented to the OS", and can grow. And it is quite nice that it also applies to shadow sets: together with allowing dissimilar members, it provides for "rolling" growth of those.

But, regrettably, the bottom line is that at one time, an INIT/LIMIT must be (have been) done.

hth

Proost.

Have one on me.

jpe

Re: increase disk size - online

Robert Gezelter — Thu, 07 Sep 2006 21:52:34 GMT

Jiri,

I am in the middle of multiple client emergencies, but I covered some of the issues you are interested in in my presentation "Migrating OpenVMS Storage Environments without Interruption or Disruption" at the 2005 HP Technology Symposium. The slides from this talk are available at http://www.rlgsc.com/hptechnologyforum/2005/1146.html

- Bob Gezelter, http://www.rlgsc.com

Re: increase disk size - online

Ian Miller. — Fri, 08 Sep 2006 04:40:02 GMT

Instead of INIT/LIMIT you can do
$ SET VOLUME/LIMIT
but the disk must be mounted privately when you do this.