HP StorageWorks HSG80 Enterprise Modular Storage RAID Array Fibre Channel Solution Software V8.8 for Sun Solaris Release Notes (AA-RV1SA-TE, March 2005)

ACS Feature Support
37HSG80 Enterprise Modular Storage RAID Array Fibre Channel Solution Software V8.8 for Sun
Solaris Release Notes
ACS Feature Support
The following sections provide details for specific ACS features.
SCSI-2 to SCSI-3 Migration
In order to extend interoperability within the heterogeneous SAN, HP highly
recommends that customers begin migrating from SCSI-2 to SCSI-3 protocols.
Moving to SCSI-3 allows greater diversity in the operating systems (OS) and
storage products (including EVA) that comprise a SAN.
All migrations from SCSI-2 to SCSI-3 should be planned during scheduled
downtime. SCSI migrations require a controller restart and most likely a server
restart. Data contained on CCL units needs to be moved to new units once SCSI
migration is complete.
Caution: Before attempting a SCSI-2 to SCSI-3 migration, it is extremely
important that all data be backed up and that units be available for
remapping CCL data. In addition, ensure that all redundant storagesets are in
normal (non-reduced) mode.
When migrating from SCSI-2 to SCSI-3, the controller checks for controller unit
D0 and does not change modes until D0 (at all presented offsets) is deleted. One
or more LUNs are lost after the mode change. If you are planning to move from
SCSI-2 to SCSI-3, back up your data first. The data in LUN 0 (and any other
offsets that map to LUN 0) that was used in SCSI-2 requires that the data be
moved to a different LUN. It may be necessary to retrieve this data from a backup.
Note: If multi-bus failover configurations or server clustering are employed in the
environment, there may be additional considerations regarding CCL usage during SCSI
migration procedures. Refer to your multi-bus failover or server clustering
documentation prior to implementation. In addition, there may be OS-based limitations
on SCSI-3 usage to consider, particularly in down-level versions of your OS. Review OS
documentation prior to migration.
For more information, see the “What is the Command Console LUN?” and
“Assigning Unit Numbers Depending on SCSI_VERSION” sections of Chapter 1
in the HP StorageWorks HSG80 ACS Solution Software Installation and
Configuration Guide.