Specifications

Installing External SCSI Devices
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3. Use the following cables between the OCTANE workstation and the device, or
between devices:
■ If you are attaching thedevice tothe workstation, usethe high-density68-pin to
Centronics® 50-pin Fast SCSI cable. See Figure 6-4.
■ To daisy-chain an Ultra SCSI device to another Ultra SCSI device, use a 68-pin
to 68-pin cable.
■ To daisy-chain an Ultra SCSIdevice to a Fast SCSI device, use a 68-pin to 50-pin
Centronics Fast SCSI cable.
Figure 6-5 Comparing Speed of Daisy-Chained Devices
The speed of the devices in the daisy chain is determined by the speed of the active
device. If a slow device is active, the bus runs at a slow speed; if a high-speed device is
active, the bus runs at a high speed.
OCTANE
8-bit Fast SCSI-2 device
10 MB/sec
or or
8-bit Fast SCSI-2 device
10 MB/sec
Speed = 10 MB/sec
Speed = 40 MB/sec
Speed = 10 MB/sec
(8-bit device active)
16-bit Ultra SCSI device
40 MB/sec
16-bit Ultra SCSI device
40 MB/sec
16-bit Ultra SCSI device
40 MB/sec
8-bit Fast SCSI-2 device
10 MB/sec
= 40 MB/sec
(16-bit device
active)