Installation |
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4 |
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3 |
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2 |
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Terminator Power Source Jumper |
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1 | 4 | 3 |
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Assign the terminal power jumpers as shown below. | 2 | 1 |
Initiator supplies power over the SCSI bus source for |
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terminators. Drive supplies no terminator power. |
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Drive supplies power for its own terminator |
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not to the SCSI bus (factory setting). |
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Drive supplies power for the external terminator at the end of |
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the daisychain. Terminator |
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* Recommended only for the last drive on the daisychain. |
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Terminator |
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(must be installed if drive is at |
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either end of daisychain) |
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ID2
ID1 SCSI Selectors
ID0
Write Protect (WP)
Master/Slave (MS)
J4A
ID1 WP
ID2 ID0 MS
Select SCSI ID, write protect, and master/slave options by placing jumpers as shown below.
SCSI ID = 0
SCSI ID = 1
SCSI ID = 2
SCSI ID = 3
SCSI ID = 4
SCSI ID = 5
SCSI ID = 6
SCSI ID = 7
Write Protect = On (prevents writing)
Write Protect = Off (enables writing)
Master drive for spindle sync
Slave drive unless selected as the master by a SCSI command
Spinup Delay option (SD)
Start Command option (SC)
SCSI Bus Parity Check option (PAR)
Sweep Cycle option (SWP)
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J4B | SD | PAR |
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Spinup Delay option (SD)
Immediate spinup
(if the Start Command option jumper is disconnected)
Spinup delay equal to the SCSI bus ID multiplied by 10 seconds (if the Start Command option jumper is disconnected)
Start Command option (SC)
Start spindle according to the Spinup Delay option jumper
Spindle spinup is delayed until a Start Unit command is received from the SCSI bus
SCSI bus parity check (PAR)
Enable parity check of SCSI bus data
Ignore parity
Sweep Cycle option (SWP)
Disable sweep cycles (recommendation — sweep cycles should be enabled at the system or subsystem level)
Enable sweep cycles at the drive level