Installation and Reference Guide HP StorageWorks Secure Path 3.0F Service Pack 4 for HP-UX 11i v1.0 and 11i v2.0 (5697-8001, March 2009)

For example, enter the following command to prefer unit D5 to this controller, and then later
set a preferred path to that unit using the Secure Path spmgr utility prefer command:
HSG80> set D5 preferred_path=this_controller
Using SCSI-3
This section describes the following requirements for SCSI-3:
• Secure Path 3.0F SP4 requires the HSG80 controllers to be at ACS firmware 8.7 or later for SCSI-
3 operation with extended LUN support. To enable extended LUN support, the HSG80 operating
system mode parameter must be set to HP_VSA.
• The Command Console LUN (CCL) is required for SCSI-3, and the CCL is the first array unit (D0).
This reduces the number of available LUNs by one on the HP-UX system.
NOTE:
To generate useful ioscan output during installation, do not enable SCSI-3 until instructed in
System configuration.
See Configuring optional HSG80-based array features if you want to configure an optional feature,
or continue with System configuration to configure the system for Secure Path.
Managing the command console LUN in SCSI-2 mode
The StorageWorks array is factory-configured with a virtual LUN, located on Controller A, LUN 0.
This device is called the Command Console LUN (CCL) and it enables the array to get recognized
by some host systems as soon as it is attached to the Fibre Channel switch and configured into the
operating system. The CCL also serves as a communications device for the StorageWorks Command
Console (SWCC) Agent. The CCL identifies itself to the host by using a unique identification string.
This string, HSG80CCL, is returned in response to the SCSI Inquiry command.
The following describes the CLI commands that affect CCL:
• The CCL is enabled upon delivery. Determine its address by entering the following CLI command:
HSG80> show this_controller
• Disable the CCL by entering the following CLI command:
HSG80> set this_controller nocommand_console_lun
• Enable the CCL by entering the following CLI command:
HSG80> set this_controller command_console_lun
In dual-redundant controller configurations, these commands alter the setting of the CCL on both
controllers.
When the CCL is enabled, its ID is the lowest-numbered available LUN. When creating LUNs and
logical units on the RAID array using the CLI, you must reserve the address of the CCL to D0, and you
must not use this address (D0) for a data LUN. However, if the CCL’s LUN is assigned to a LUN, the
CCL floats to the next-lowest LUN that is available.
Secure Path for Active-Passive disk arrays26