SCSI ID Configurations
H-9
Compaq Confidential – Need to Know Required
Writer:
Marcello Frau
Project:
Compaq ProLiant CL380 User Guide
Comments:
Part Number:
118128-003
File Name:
n-apph SCSI ID Configurations.doc
Last Saved On:
8/28/00 4:55 PM
Active/Passive Failover Mode (Availability)
If the system is configured with two CR3500 Controllers, Host I/O Channel 0
is set to Active, and Host I/O Channel 1 is set to Active for Controller 1 and
both are set to Passive for Controller 2, then the Failover Mode is Availability.
The table below explains how the Host I/O settings determine the failover
method
Table H-2
Active/Passive Failover Mode Availability
Active/Passive Failover
Mode
Controller 1 Availability
Controller 2 Availability
Host I/O Channel 0
Active (SCSI ID = 2)
Passive (SCSI ID = 2)
Host I/O Channel 1
Active (SCSI ID = 3)
Passive (SCSI ID = 3)
You will notice that in this configuration that although there are two instances
of SCSI IDs 2 and 3, one is active and the other is passive. This prevents a
SCSI ID conflict. It is not possible to configure all four Host I/O channels to
be active.