ST43401N/ND, ST43402ND User’s Manual, Rev. B 25
Not used
Not used
Not used
Write Protect/Enable (WRT)
Slave Select (SLV)
J4A
Write Protect/Enable (WRT)
N/A N/A
N/A WRT
Write protect (disable writing)
Write enable (enable writing)
Slave Select (SLV)
Master (master for spindle sync)
Slave (slave drive unless
selected as the master by a
SCSI command)
SLV
Spinup Delay Option (SDO)
Start Command Option (SCO)
SCSI Bus Parity Check Option (SCPAR)
Sweep Cycle Option (SWP)
J4B
Spinup Delay Option (SDO)
SDO SCPAR
SCO SWP
Start Command Option (SCO)
SCSI Bus Parity Check (SCPAR)
Sweep Cycle Option (SWP)
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 spindle according to the Spinup
Delay Option jumper
Start spindle after the SCSI bus sends
a Start Unit command
Enable parity check of SCSI bus data
Ignore parity
Disable sweep cycles (recommendation —
sweep cycles should be enabled at the
system or subsystem level)
Enable sweep cycles at the drive level
= Jumper
connected
= Jumper not
connected
= Non-applicable jumper
(not relevant to the
option discussed)
Figure 9. ST43402ND control board jumpers
