Serviceguard Version A.11.16 Release Notes, 2nd Edition, September 2004

Serviceguard Version A.11.16 Release Notes, Second Edition
Compatibility Information and Installation Requirements
Chapter 1 17
Required Firmware Upgrades for FibreChannel SCSI
Multiplexer Model A3308A
The Model A3308A FibreChannel SCSI Multiplexer should be upgraded
to Firmware revision 3810 (980611) or newer. This firmware revision
supports SCSI II Reserve/Release functionality. This is required in order
to enforce exclusive access to tape devices.
Setting of SCSI Auto-Termination
Highly available shared SCSI buses require the use of SCSI Inline
Termination cables and SCSI V-cables. The use of these cables requires
that SCSI Auto-Termination be set OFF on the SCSI host bus adapter.
On some SCSI host bus adapters, auto-termination is configured by
switches on the card; while on other SCSI host bus adapters,
auto-termination is configured programmatically through the HP 9000
PDC (processor dependent code, or firmware).
On recent HP 9000 systems, the PDC has been modified so that SCSI
auto-termination is enabled by default for some SCSI host bus adapters.
In addition, many newer SCSI host bus adapters now have a default
setting of auto-termination enabled. In order to use the SCSI Inline
Terminator and V-cables, you must ensure that the auto-termination is
disabled on the SCSI host bus adapters. Be sure to disable the
auto-termination for all SCSI host bus adapters connected to a shared
SCSI bus. This is done through the PDC configuration utility (refer to
the manuals for your SCSI host bus adapter for instructions for how to
do this). For SCSI cards where this configuration is set manually using
switches on the card, ensure that auto-termination is disabled. If you are
upgrading to a newer PDC version, you must check the auto-termination
parameter and re-set it to disabled for each SCSI host bus adapter
connected to a shared SCSI bus.
NOTE Cards that cannot be programmatically configured may show an
auto-termination setting of either OFF or UNKNOWN. Either of these is
acceptable.