Expansion Unit Option Switches - IBM EXP15 Hardware Maintenance Manual

Expansion Unit Option Switches

Tray Number Switch
Option Switches
The expansion unit has three types of ID numbers:
Drive SCSI IDs Identifies each drive in the
expansion unit.
Tray ID identifies each expansion unit
SAF-TE chip SCSI ID System-management SCSI
Accessed Fault Tolerant
Enclosure processor
Switch settings are as follows:
Option Switches
– Switch 1 off (default)
- Bus 1 and 2 as Single Bus 1, accessing all
ten drives, (IDs 0-4 and 8-12).
– Switch 1 on
- Bus 1 and Bus 2 accessing 5 drives each.
Bus 1 accessing IDs 0-4
Bus 2 accessing IDs 0-4
Note
Option Switches 2-5 must be set to the Off (down)
position. Errors might occur if these switches are set
to the on position.
Tray Number Switch
– Identifies each expansion unit 0-9.
SAF-TE chip SCSI ID
– Internal SCSI ID numbers 14 and 15.
Netfinity EXP15 Type 3520
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