topic Re: EVA / Continous Access / Storage Server Problem in HPE EVA Storage

EVA / Continous Access / Storage Server Problem

Matthias Rettl — Mon, 19 Jun 2006 02:51:09 GMT

Hy there!

My customer has two EVA 4000s (XCS v5.100) with Continous Access and two HP Storage Servers (HP DL380-3.4G HPM Storage Server SAN 371227-B21) with Windows 2003 Server R2 Clustered.
Latest Command View EVA and RSM Versions are installed on one of the nodes. MPIO Full Featured v2 is installed.

Everything is working fine so far.

There are two DR Groups. One mirrors the LUNs from EVA-1 to EVA-2 and the other group from EVA-2 to EVA-1. All those LUNs are presented to both Nodes on both EVAs.

When I initiate a FAILOVER in RSM (to change the primary/secondary EVA) on one of the DR Groups the following phenomenon happens:

A LUN in the DR Group can be accessed by its host after a few seconds IF THE LUN IS _NOT_ CONFIGURED AS A CLUSTER RESSOURCE. This works fine.

BUT: If the LUN is a Cluster Ressource, i cannot access the LUN after the Failover! Neither a Hardware Rescan nor a Reboot helps.

Any ideas for my problem?

Kind regards,
Matthias

Re: EVA / Continous Access / Storage Server Problem

Roland Kastner_2 — Mon, 19 Jun 2006 05:46:02 GMT

Hi Matthias,

which HBA driver, Storeport or Scsiport, do you use ?
Do you boot from SAN ?

Best regards
Roland

Re: EVA / Continous Access / Storage Server Problem

Matthias Rettl — Mon, 19 Jun 2006 06:04:54 GMT

First i tried the SCSIPort, then updated to Storport. Same result.
No, I do not boot from SAN.

Regards,
Matthias

Re: EVA / Continous Access / Storage Server Problem

Nigel Poulton — Mon, 19 Jun 2006 06:06:30 GMT

This could well be a cluster related problem. Do you know if the SCSI reserve has been released from the LUN that is causing you problems?

I have seen "similar" problems where the SCSI reserve was not released from the LUN and had to be manually released.

Have you tried issuing a SCSI Reset to the LUN and then seeing if it can be accessed.

Re: EVA / Continous Access / Storage Server Problem

Matthias Rettl — Mon, 19 Jun 2006 06:33:37 GMT

I have just heard from an HP Storage guy that it is a RSM issue. It *should* be solved in a patch available soon, but there is no workaround of this problem. RSM & CA is CRAP!

But to your questions: i rebootet the clusternodes... this should solve all, but it did not.

I'll keep you informed in this thread if there are some new informations.

Regards,
Matt

Re: EVA / Continous Access / Storage Server Problem

chris barnett_2 — Mon, 19 Jun 2006 17:08:01 GMT

Have you tried initiating a failover through Command View. If this works OK you could then script it using SSSU.

Re: EVA / Continous Access / Storage Server Problem

Matthias Rettl — Tue, 20 Jun 2006 02:38:36 GMT

Hy!

Just go a call from a hp guy:

The FAILOVER with CA in a Cluster does only work with CLX (Cluster-Extension-EVA) installed!!!
(But he is not sure werther CLX is already available for W2003 Storageserver).

Can anyone agree to this statement???

regards,
matthias

Re: EVA / Continous Access / Storage Server Problem

Antonio Gonzalez_4 — Fri, 18 Aug 2006 17:57:37 GMT

Matthias, any final conclussion regarding clusters ??
I though that CLX was optional for automatic failover, not a requirement for standar functionality.

thanks

Re: EVA / Continous Access / Storage Server Problem

Cavailhe — Sun, 20 Aug 2006 10:12:00 GMT

Hi Matthias

About CLX compatible with Win2003, YES it is
for Entreprise Edition with service pack 1 and MSCS V5.2.

Best regards.
Olivier Cavailhe