Seagate ST43401N/ND ST43402ND control board jumpers, = Jumper connected = Jumper not connected

ST43401N/ND, ST43402ND User’s Manual, Rev. B 25

= Jumper connected

= Jumper not connected

= Non-applicable jumper (not relevant to the option discussed)

Not used

Not used

Not used

Write Protect/Enable (WRT)

Slave Select (SLV)

Spinup Delay Option (SDO)

Start Command Option (SCO)

SCSI Bus Parity Check Option (SCPAR)

Sweep Cycle Option (SWP)

J4A

N/A WRT

N/A N/A SLV

Write Protect/Enable (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)

J4B

Spinup Delay Option (SDO)

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 (SCO)

Start spindle according to the Spinup Delay Option jumper

Start spindle after the SCSI bus sends a Start Unit command

SCSI Bus Parity Check (SCPAR)

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)

SDO SCPAR SCO SWP

Enable sweep cycles at the drive level

Figure 9. ST43402ND control board jumpers