2.5-Gb Scsi Hard Disk Drive Jumper Settings - NEC POWERMATE PRO2180 - SERVICE MANUAL 1996 Service Manual

2.5-GB SCSI HARD DISK DRIVE JUMPER SETTINGS

The 2.54-GB SCSI hard drive has three jumper blocks used to configure the drive. These
are identified on the drive by labels J2, and J6, and J1-A.
Jumper block J2 sets drive termination and the termination power source. J2 also sets
optional functions such as motor start delay, write protection, and parity disable.
Jumper block J6 sets SCSI ID selection and remote LED connection. Pins 13-20 and 9-10
are reserved and should have no jumpers installed.
Jumper block J1-A provides an alternate means of setting the SCSI ID by connecting an ID
cable to the host backplane.
The following table details the pin functions for each jumper block. The factory default
configuration for the SCSI drive is for ID 0, termination enabled, and termination power
supplied by the drive.
Table Appendix C-2 2.5-GB SCSI Hard Disk Jumper
Jumper
Block
J2
J6
J1 - auxilliary
Hard Disk Drive Specifications and Jumper Settings
Settings
Pins Function
TE Terminator enable (default)
DS Delay motor start
ME Enable motor start (start by command)
WP Write protect
PD Parity disable
RES Reserved
TP Termination power from drive (default)
TP Termination power to SCSI bus
3&4 SCSI ID bit 1
5&6 SCSI ID bit 2
7&8 SCSI ID bit 3
9&10 Reserved
11&12 Reserved
1&2 SCSI ID bit 0
3&4 SCSI ID bit 1
5&6 SCSI ID bit 2
7&8 SCSI ID bit 3
9&10 Reserved
11&12 Drive activity LED
13&14 Reserved
15&16 Reserved
17&18 Reserved
19&20 Reserved
1&2 SCSI ID bit 0 (default)
C-3