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2-12 Ultra Enterprise 6000/5000/4000 Systems Installation Guide—November 1996
2
Figure 2-11 Fiber Cable and Fibre Card Connectors and Ports on the I/O Board
2.8 Connecting External SCSI Devices
External SCSI-2 devices connect to your system through the built-in single-
ended Fast/Wide SCSI-2 port on I/O boards (except for the board in slot 1), or
through FSBE/S, DSBE/S, SWIS/S, or DWIS/S SBus cards installed on I/O
boards.
Note – The onboard SCSI-2 bus on the I/O board in slot 1 controls internal
SCSI tray devices. Therefore, the external SCSI connector on the I/O board in
slot 1 must always have a terminator installed.
Note – The maximum combined length for a string of SCSI cables is six meters
for non-differential cables. For differential SCSI cables, the maximum is 25
meters.
When calculating the total length of a SCSI string, include external cables,
internal cables, and printed traces. Table 2-2 lists internal measurements for the
Enterprise servers.
Connect cable through
Port A (Fiber 0) or
Port B (Fiber 1)
Fiber
1
Fiber
0
A
B
Fibre card connector
Key notch
in module
connector
Notch on
fiber cable