Compaq S5 - Manual (Page 26)

DWZZH 16–Bit UltraSCSI Hub (Rack-Mountable)
3–6 EK–SMDZS–UG. B01
Figure 3-4 DWZZH-09 Front Panel
B us y
P o w er
Fa ir D is a ble
B us y
P ow er
S H R -1107
F a ir D is ab le
3.3.1 Fair ARB Disable
The large Hub contains a switch on the front panel that allows the user to disable
the Fair ARB feature of the Hub. When Fair ARB is disabled, the Hub services
SCSI arbitration cycles in the conventional SCSI priority order. Host port SCSI
ID assignments are not linked to the physical port location in the Hub when Fair
ARB is disabled.
3.3.2 Indicators
The large Hub has two indicators on the front panel. The green LED indicates
that POWER is applied to the Hub, while the yellow LED indicates that the SCSI
bus is BUSY.