Chapter 2
HP-UX Installation: HP A7173A PCI-X Dual Channel Ultra320 SCSI Host Bus Adapter
SCSI Parameter Settings
16
SCSI Parameter Settings
If the A7173A adapter is new and it is installed in a slot that has never been configured for a SCSI adapter,
the adapter will be set to the following default settings:
•
SCSI ID = 7
•
Maximum Data Transfer Rate = MAX (320 MB/s)
•
Bus Width = 16 bits (Wide)
IMPORTANT
If the A7173A adapter is new, but it is being installed to replace another SCSI adapter, the mpt
driver will continue to use the SCSI parameter settings that are already configured on the slot.
If the A7173A adapter has been previously installed in a different slot or system, the SCSI
parameter settings will not migrate to the new slot or system.
It is strongly recommended that the SCSI parameter settings be confirmed, and changed if
necessary.
WARNING
HP DS2100, DS2110, and DS2300 storage devices are only supported at a maximum
SCSI data transfer rate of U160. The SCSI data transfer rate must be limited to U160
(or slower) to avoid potential data integrity issues. The SCSI bus will not
automatically adjust to accommodate the DS2100 or the DS2110. The SCSI data
transfer rate must be deliberately set to a maximum of U160; offline via the Boot
Console Handler (on PA RISC systems) or EFI (on Itanium
systems), or online via
the mptconfig command. With the DS2300 the SCSI data transfer rate will
automatically be negotiated to U160 (or slower), but the negotiation could cause a
few SCSI bus resets, which can be avoided by deliberately setting the maximum
SCSI data transfer rate to U160.
The SCSI parameters for an A7173A adapter installed in
any
supported HP-UX system can be confirmed or
changed online using the
mptconfig
command, see Step 2 in the “Verifying the Installation” section of this
Installation Guide for details.
The SCSI parameters for A7173A adapters installed in PA-RISC based systems can be confirmed or changed
offline using the
“SCSI
” command, which can be accessed from the Boot Console Handler (BCH) menus, see
the
HP A7173A PCI-X Dual Channel Ultra320 SCSI Host Bus Adapter Support Guide
for details.
The SCSI parameters for A7173A adapters installed in Itanium
based systems can be confirmed or changed
offline using the Extended Firmware Interface (EFI), see the
HP A7173A PCI-X Dual Channel Ultra320
SCSI Host Bus Adapter Support Guide
for details.
