Quantum 10K II - Manual (Page 39)

Installation
3 − 12 Quantum Atlas 10K II Ultra 160/m SCSI Hard Disk Drives
3.4.2 Jumper Configurations and Connections for SCA-2 Connector
Versions
This section describes jumper settings and connections for Atlas 10K II Ultra 160/m
SCSI drives with 80-pin SCA-2 (Single Connector Attachment) connector for the
following features:
•
SCSI ID
• Spin Up
• Activity LED displays
Use Figure 3-5 to locate the appropriate pins for configuring the drive. Note that
Figure 3-5 does not call out each of the 80 pins on the connector, but rather
illustrates the layout of the pins.
NOTE
The SCA-2 Connector version of the disk drives do not provide TERMPWR,
Active Termination, or Write Protection.
3.4.2.1 Termination for SCA-2 Connector Versions
These versions of Atlas 10K II Ultra 160/m SCSI disk drives cannot be configured to
provide bus termination. Therefore, be sure to properly terminate the SCSI bus on
which this drive is installed.
NOTE
Refer to your system or SCSI controller documentation regarding any
additional recommendations regarding drive placement on the SCSI bus and
SCSI bus termination.
3.4.2.2 SCSI ID for SCA-2 Connector Versions
Each SCSI device on the bus must have a unique SCSI ID number assigned to it.
The drive can be configured for SCSI ID numbers that range from 0 through 15.
Configure the SCSI ID by providing the proper open or ground signal inputs to the
referenced pins of the drive’s 80-pin new version SCA-2 connector (Figure 3-5). Refer
to Table 3-3 for SCSI ID pin assignments.
NOTE
Refer to your system or SCSI controller documentation for specific
recommendations about assigning SCSI ID numbers for your specific system.