Specifications

AM-6060 Network Server AMB98-07 Page
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4
Memory The AM-6060 accommodates main memory from 8MB to 256MB. Four
SIMM sockets are provided, the same as in the AM-6000. Configurations
range from 8MB (two 4MB SIMMs) to 256MB (four 64MB SIMMs). The
arrangement is versatile and easy to upgrade. For details see the AM-6060
Memory Configurator on page 8.
SCSI Support SCSI device support begins at a 32-bit bus-master SCSI controller on the
AM-6060 main processor board. As standard, the board provides two inter-
faces to the controller. One is a 50-pin standard (“narrow”) SCSI interface, the
same as provided in Eagle systems and on Roadrunner 030 and 040 boards.
The other is a 68-pin Wide SCSI interface, as on the Roadrunner 060 board.
Disk drives, tape drives, and other SCSI peripherals connect to the controller
via SCSI bus cabling. The AM-6060 is offered in two versions: one with a
narrow (8-bit) SCSI bus cable and the other with a WideSCSI (16-bit) cable.
A system ordered with narrow SCSI can be field-upgraded to Wide SCSI
when the need arises. Characteristics of the two busses are as follows:
• The
Narrow SCSI bus
supports SCSI-2 disk drives, as used in Eagle
systems and Roadrunner 030- and 040-equipped systems today. The bus
also supports streamer tapes, DAT tapes, CD-ROMs, and the AM-642
SCSI-to-Pertec Converter for ½" tape drives. The bus is one byte wide
(8 bits plus parity) and supports a maximum transfer rate of 10
megabytes per second. Physically, the narrow bus is a 50-conductor flat
cable about 2½ inches wide.
• The
Wide SCSI bus
provides twice the data width: two bytes, or 16 bits.
Doubling the width of the data path doubles the maximum transfer rate to
20 MB per second. The bus originates at the 68-pin connector on the
processor board. Wide SCSI (“Fast-Wide SCSI-2”) and Ultra SCSI
peripherals attach directly to the bus. Narrow SCSI peripherals connect via
50-pin-to-68-pin adapters. For configuration guidelines see “SCSI Busses”
later in this bulletin. The Wide SCSI bus cable is a 68-conductor flat
cable about 1¾ inches wide. It’s a miniaturized design, so it’s physically
smaller than the narrow SCSI cable.
• Additional SCSI peripherals can be located outside the AM-6060 chassis
and connected by external cables. See “SCSI Busses” for configuration
guidelines. The optional
AM-441 Wide SCSI Bus Repeater
provides
added flexibility in the number and location of external devices.
Disk-intensive applications are potentially faster with the Wide SCSI bus and
a Wide SCSI disk drive. Wide SCSI also has the advantage in multi-disk
configurations. Spreading a file and its index across two Wide SCSI disks, for
example, boosts the performance advantage of each disk.