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Multiple SCSI configurations are possible both inside system and expander
cabinets and outside either cabinet. Manufacturing connects all SCSI de-
vices it can in both system and expander cabinets. There is space in both
cabinets to pass cables from front to back (see Figure 4-5). If there is only
one power supply in the cabinet, pass the SCSI cables along the top of the
supply. You can assume that loose SCSI cables provided with a system go
from device adapters in the system cabinet to devices in another cabinet.
The following rules apply:
1.
FWD SCSI ports on the KFTIA have "Y" cables (BN21W-0B) plugged
into them. Cables to devices plug into these "Y" cables.
2.
All SCSI buses must be terminated at both ends. The terminators for
the AlphaServer 8200 are interchangeable and are the H879 or the
H8863.
3.
All cables exit and enter cabinets at the bottom front.
4.
Signal cables should be routed away from the power cables on the
front right and rear left frame.
5.
SCSI cables that go to devices at the rear of either cabinet are routed
through the space above the first option slot if there are two power
supplies; otherwise, lay the cable on top of the only power supply.
6.
The SCSI cables should not be routed in front of power supply fans.
Table 4-1 lists SCSI cables used in AlphaServer 8200 systems to connect
devices outside the system cabinet with their adapters.
Table 4-1 SCSI Cables to Devices in Other Cabinets
Cable
Number
From
1
BN21H-05
PCI (M
)
PCI (M)
BN21K-03
PCI (E)
PCI (M)
BN21K-05
1 M = In main or system cabinet.
2 E = In expander cabinet.
Making Console, SCSI, Ethernet, FDDI, and DSSI Connections 4-7
To
2
BA350 (front & rear E
DWZZA, BA350 (front E) (FWD)
DWZZA, BA350 (rear E) (FWD)
DWZZA, BA350 (front & rear E)
Length
(meters)
) (SE)
5
3
5
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