EVA & XP disk allocation to a same Wintel server , Will be a issue ?

[SAN Works]

We are planing alocate a EVA 8000 & XP 12K disks to same windows 2003 server , I like to know zoning & maaping eva & XP disk through same HBA will create any issue to the server performace & stability ?

[Eric de Lange (MSE)]

I would recommend against mapping EVA and XP luns through the the same port/HBA.

Eventhough the XP disks and EVA disks are in different zones, the HBA (initiator) WWN would be a member of both EVA and XP disk zones causing a potential availabillity problem. For instance, a SAN State Change notification (SCN) in the EVA disk zone would also trigger a SCN in the cause IO in the XP disk zone to be temporarily stopped as well.

I would use separate HBA's for EVA and XP presentations. MPIO for EVA and XP can coexist on the same server (documented in teh MPIO release notes)

hope this helps,
-Eric

[Patrick Terlisten]

Hello Eric,

even if you're using a single initiator/ single target zoning?! I don't think so.

I would recommend a single initiator/ single target zoning. By using this there shouldn't any problem sharing an HBA for EVA and XP presentations.

Regards,
Patrick

[Uwe Zessin]

I recommend to check the SAN Design guide.