Installing External Scsi Devices - Silicon Graphics OCTANE2 Owner's Manual

Installing External SCSI Devices

Following are some tips for connecting SCSI devices to your workstation.
• You can mix Ultra and Fast devices on the same bus. You can also mix 16-bit and
8-bit devices on the same bus. The overall performance of a mixed bus can vary
widely.
• To daisy-chain a mix of wide and narrow devices, place the wide devices (as a
group) closest to the Octane2 workstation where the bus is wide, and place the
narrow devices (as a group) at the end of the daisy chain.
Note: Be sure to use an adapter or other special cable that terminates the upper half
of the SCSI bus when converting from the final wide device to the first narrow
device. SGI integrates termination into all SGI-supplied cables, but not all third-party
cables have integrated termination.
• Unsupported devices may not work with the Octane2 workstation, and may be
incompatible with supported devices.
• The combined length of all the SCSI cables on a daisy-chain determines how many
devices can be daisy-chained.
• Set addresses manually only on external SCSI devices. See the device manual for
setting the address on the device. Each device must have a unique address.
• Drives are easily damaged. Handle your drive carefully; do not drop it or handle it
roughly.
This section shows you how to connect external SCSI devices to your workstation.
External devices include:
• DAT or DLT tape drives
• CD-ROM drives
• Floppy drives
• Other external SCSI devices
For information about SCSI bus and device speeds, see "About SCSI Buses and Devices"
on page 130.
Installing External SCSI Devices
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