Configuring IBM DS5000, IBM DS4000, and IBM DS3000 systems for the storage server

IBM® DS5000™, IBM DS4000®, and IBM DS3000 storage systems are supported with the SAN Volume Controller clustered system.

About this task

The following steps provide the supported options and impact on the SAN Volume Controller system:

Set the host type for SAN Volume Controller to IBM TS SAN VCE. For higher security, create a storage partition for every host that will have access to the storage system. If you set a default host group and add another host other than SAN Volume Controller to the default group, the new host automatically has full read and write access to all LUNs on the storage system.
See the following website for the scripts that are available to change the setup of the IBM DS5000, IBM DS4000, or IBM DS3000 system:
www.ibm.com/support/

The following limitations apply to partitions:

Only one IBM DS5000, IBM DS4000, or IBM DS3000 system storage partition that contains any of the ports of any of the nodes in a single SAN Volume Controller system can be created.
Only map one partition to any of the ports on any of the nodes that are in the SAN Volume Controller system to avoid unexpected behavior. For example, you can lose access to your storage or you might not receive warning messages, even if there are events logged in the SAN Volume Controller event log.

The following limitation applies to IBM DS5000, IBM DS4000, or IBM DS3000 Copy Services:

Do not use IBM DS5000, IBM DS4000, or IBM DS3000 Copy Services when the SAN Volume Controller system is attached to an IBM DS5000, IBM DS4000, or IBM DS3000 system.
You can use partitioning to allow IBM DS5000, IBM DS4000, or IBM DS3000 Copy Services usage for other hosts.

The following information applies to the access LUN (also known as the Universal Transport Mechanism (UTM) LUN):

The access/UTM LUN is a special LUN that allows a IBM DS5000, IBM DS4000, or IBM DS3000 system to be configured through software over the Fibre Channel connection.
The access/UTM LUN does not have to be in the partition that contains the SAN Volume Controller ports because the access/UTM LUN is not required by the SAN Volume Controller system. No events are generated if the access/UTM LUN is not in the partition.
If the access/UTM LUN is included in the SAN Volume Controller partition, the access/UTM LUN must not be configured as logical unit number 0. If the SAN Volume Controller partition (the host group) has been created with multiple hosts, the access LUN must be present in all hosts and must be the same logical unit number.

The following information applies to the logical unit (LU):

The SAN Volume Controller system attempts to follow the preferred ownership that is specified by the storage system. You can specify which controller (A or B) is used for I/O operations to an LU.
If the SAN Volume Controller system can see the ports of the preferred controller and event conditions do not exist, the SAN Volume Controller system accesses the LU through one of the ports on the preferred controller.
If event conditions exist, the SAN Volume Controller system ignores the preferred ownership of the IBM DS5000, IBM DS4000, or IBM DS3000 system.