HP StorageWorks Secure Path V2.0D Service Pack 2 for IBM AIX Release Notes (T3034-98201, May 2004)

Operating considerations
19Secure Path v2.0D Service Pack 2 for IBM AIX Release Notes
Reassigning storage units
To reassign a storage unit to a different LUN, the current LUN must first be
deleted (see “Deleting storage units” on page 21) and the storage unit (DISK,
RAIDSET, etc.) must be initialized using the CLI command INIT, such as INIT
DISK40100. The storage unit may then be assigned to a new LUN using the CLI
ADD command.
The new LUN must be made available using cfgmgr. Volume groups previously
exported must be imported and mounted.
Refer to HP StorageWorks Solution Software Version 8.6 or 8.7 for IBM AIX for
further information.
SCSI-3 considerations
Secure Path v2.0D Service Pack 2 for IBM AIX supports SCSI-3 Mode. To use
SCSI-3 mode, the Storage System HSGx0 controllers must be set to SCSI-3
mode. To accomplish this you must establish a connection to the HSGx0 using
CLI. The You can change the SCSI version default is SCSI-2 using the CLI SET
command as in SET SCSI-VERSION=SCSI-3. This sets both controllers to
SCSI-3 mode.
There are a few issues concerning the use of SCSI-3 mode and Secure Path v2.0D
Service Pack 2 for IBM AIX as follows:
■ Using SCSI-3, the Command Console LUN (CCL) is always enabled on each
port of each controller and assigned to LUN 0. If a storage unit has been
assigned to LUN 0, the CCL prevails and that storage unit is not presented to
Secure Path (or IBM AIX).
■ When configuring the system with SCSI-3 mode, a CCL is configured for
each port on each controller. Since Secure Path uses only one port on each
controller for each path, there are two CCLs displayed when the IBM AIX
command lsdev-Ccdisk is used. Both are assigned the same target and
LUN 0, but are assigned to different HBAs. The maximum number of data
LUNs is reduced from 32 to 31.
■ The Secure Path utility /usr/lpp/cbxfc/cbxfcsm listall
displays both paths for the Console LUN as active. In SCSI-3 mode, the status
of the paths are disregarded as one path is always available and the Console
LUN is not under control of Secure Path.