topic Re: MSA1000 - medium offline in Operating System - OpenVMS

MSA1000 - medium offline

Larry Hotard — Wed, 06 Jun 2007 15:17:41 GMT

Two node cluster sharing MSA1000 disk shelf.
Each node has 2 fiber hba. Upon trying to
initialize disks from each node, some will
initialize on both nodes, some will initialize
on one node only and some will not initialize
on either nodes at all. The error is medium
offline.

IO autoconfig has been done on both nodes.

All the disks can be seen via clue scsi/summ on
both nodes.

There are 2 MSA1000 shelves, one with dual channels and the other is single channel shelf.

Running Open VMS 7.3-2. Current on the Patch list. All of the device numbers can be seen
via show dev $1$dga.

Question is why can't I initialize all of the disks and mount the disks from both nodes in
the cluster?

Thanks.

Re: MSA1000 - medium offline

John Gillings — Wed, 06 Jun 2007 17:56:23 GMT

Larry,

Perhaps I've misunderstood? It sounds like you're trying to INIT a disk twice, once from each node? You only need to do it once in the lifetime of the volume. You should then be able to mount the volume on any or all cluster nodes. Usually something like:

$ INIT device VolumeLabel /MAXIMUM_FILES=estimate/HEADERS=estimate/LIMIT/anything-else...
$ MOUNT/CLUSTER device VolumeLabel

Please try the above commands on ONE node and post the exact and complete error message(s), if you get any.

I'm not sure what would happen if you attempted to perform the INIT on two nodes simultaneously.

See HELP/MESSAGE MEDOFL for an explanation of the error condition.

Re: MSA1000 - medium offline

Larry Hotard — Wed, 06 Jun 2007 18:15:30 GMT

Sorry for the confusion. In the attempt to
see if both nodes have access to the disk, I
either try to mount the disk or initialize
the disk from either nodes. In comparing all
of the disks with the ones that works and the
ones that doesn't work and the ones that
works partially, there doesn't seem to be
anything out of the ordinary.

(The plan is to shadow these disks and will
be shared by both nodes once access from
both nodes is confirmed.)

By the way forgot to mention this is on a
new Alpha GS1280 box being partitioned into
two nodes.

Thanks.

Re: MSA1000 - medium offline

Uwe Zessin — Thu, 07 Jun 2007 12:42:53 GMT

Make sure that _all_ 'connections' on the MSA1000 are set to the OpenVMS profile.

> show connections

Re: MSA1000 - medium offline

Larry Hotard — Tue, 12 Jun 2007 09:37:50 GMT

Setting the profile to OpenVMS did the trick.

Apparently the profile default does not do
IO multiple paths.