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16 Maintaining and Troubleshooting the Gateway ALR 7300 Server
SCSI controller and connectors
This integrated dual channel Adaptec
®
AIC™-7890 SCSI controller is a
high-performance, PnP compliant, single-chip PCI local bus-to-Ultra2
SCSI master host adapter. Its advanced SCSI I/O cell technology ensures
data integrity for higher I/O bandwidth requirements with data rates of
40-MB/sec in Ultra mode and 80-MB/sec in Ultra2 mode.
Additional features:
•
Dual LVD 16-bit (68-pin) PCI-to-Wide Ultra2 SCSI connectors
•
Full 32-bit PCI bus master implementation maximizing data
transfer on PCI local bus at 133-MB/sec data bursts
•
SCSI configured automatically (SCAM) Level 1 for Windows 95
®
enabling automatic configuration of new devices without having to
reboot the system.
•
Wide SCSI configuration supporting up to 15 connected SCSI
peripherals per channel, for a total of up to 30 devices. Up to seven
8-bit devices can be installed on each channel.
•
Multithreading support for up to 255 simultaneous I/O tasks
•
Advanced SCSI I/O cell ensuring data integrity by automatically
and continuously adjusting slew rate to compensate for SCSI bus
loading
•
Driver support for all major operating systems.
Front panel connectors
There are several connectors that provide connection of the front panel
features to the system board. Some of these connectors are redundant,
allowing the front panel features to vary according to the system
requirements and the chassis configuration. Therefore some of these
connectors are not used in the system as shipped.
SHM mode jumper
This jumper identifies the physical environment for the InforManager
server management software and should be removed from the ALR 7300.
4075.book Page 16 Friday, April 2, 1999 9:26 AM