by Jim Hawkins -- MPE/iX Lab
The A6828A and A6829A are Ultra160 LVD SCSI Host Bus Adaptor
cards for use with HP e3000 A-Class and N-Class (PCI I/O) systems.
These cards are being offered as "plug compatible" replacement
cards for the previously available A5149A and A5150A (Ultra2 LVD
HBAs) which have reached End Of Sales.
Support for these "U160" cards was offered
starting with MPE/iX Release 7.5. However, problems in the interaction
between U160 HBAs and some disks now make it a REQUIREMENT to have
patch MPEMXE8, or superceding patches, for these cards to be supported.
For customers running MPE/iX 7.5, MPEMXE8 "B" is part
of the MPE/iX 7.5 PowerPatch 1 (included via MPEMXE7 "A" which
supercedes MPEMXE8 "B"). In addition, a 7.0
version of MPEMXE8 is available for customers who need to purchase
new LVD HBA cards for their existing A or N-Class system running
MPE/iX 7.0. If at all possible MPEMXE8 (directly, via superceding patch,
or PPT) should be installed before accessing any SCSI devices attached
to the U160 HBAs.
Card Details
A6828A
Single Port Ultra160 SCSI
(PCI bus) Adapter Card. This card plugs into a PCI Bus on the system
and presents a single SCSI Bus to the outside world. This SCSI Bus
is capable of operating in either LVD or SE Mode. This determination
is made automatically by the card based upon the devices and termination
present on the Bus; there is no software control for this feature.
This bus must be terminated. Depending upon the cables/connectors
being used, this would typically be either a High Density (HD) 68-pin
LVD/SE terminator such as C2364A or, for Very High Density (VHDCI)
68-pin LVD/SE cables, a C2370A.
A6829A
Dual Port Ultra160 SCSI (PCI
bus) Adapter Card. (N-Class Only) This card
plugs into a PCI Bus on the system and presents two (2) independent
SCSI Buses to the outside world. These SCSI Buses are capable of
operating in either LVD or SE Mode. This determination is made automatically
by the card based upon the devices and termination present on the
Bus; there is no software control for this feature. Each SCSI bus
must be independently terminated. Depending upon the cables/connectors
being used this would typically be either a High Density (HD) 68-pin
LVD/SE terminator such as C2364A or, for Very High Density (VHDCI)
68-pin LVD/SE cables, a C2370A.
Configuration
For SYSGEN/IOCONFIG configuration purposes, the commands used are
identical to that used with the previous cards ("AP 0/4/0/0 A5149A").
Any device ID associated with the PCI_SCSI_DAM in IODFAULT.PUB.SYS may
be used, e.g. A4800A, A5149A, A5150A, A5159A, A6828A,
or A6829A are all equivalent. During initialization the PCI_SCSI_DAM
queries the card for its attributes and sets proper operating characteristics
independent of the configuration group values.
Operational Note
When attached to MPE/iX Systems the "U160" cards
run the SCSI bus at Ultra2 Speed (80MByte/sec) rather than U160
(160MByte/sec) due to limitations in the MPE/iX Driver. Peripherals
rated to run at U160 and (future) U320 Speeds may still be connected
to this card; MPE/iX simply negotiates all transfers to be done
at Ultra2 speeds.