StorCase Technology FC-to-SCSI Single & Dual RAID - Manual (Page 110)

FC-SCSI Dual RAID Module User's Guide - Rev. A01 StorCase Technology, Inc.
Configuration 97
Configuring the SCSI Disk Channels
This function allows the user to change the configuration options for each SCSI disk channel.
In a dual controller configuration (Active-Active or Active-Passive mode), a change to this
setting on either controller is automatically updated on the other controller.
Bus Speed - The maximum speed the controller will attempt to negotiate.
160MB/sec - Default setting (DT clocking)
80MB/sec - (ST clocking)
40MB/sec - (ST clocking)
NOTE: To avoid disk channel problems, make sure the bus speed matches the speed of the
drives installed.
SCSI ID assigned to each channel (Initiator ID) - For stand-alone dual port configurations,
the controller assigns itself a SCSI ID (factory default ID7), leaving 15 SCSI IDs available for
devices. StorCase does not recommend changing the factory default Initiator ID.
In Active-Active mode, the Initiator ID cannot be changed. When in Active-Active mode, the
dual controllers communicate with each other using SCSI Initiator IDs 6 & 7 on the disk channels.
IDs 6 & 7 are factory set to ensure optimum communication between the two controllers. These
IDs cannot be changed while in Active-Active mode. DO NOT configure any other devices
to IDs 6 & 7 on the disk channels, or the Active-Active configuration will fail to operate! StorCase
does not recommend changing the factory default Initiator ID(s).
Domain Validation - The user can enable this function to ensure that the system is running
at Ultra160 speed (this function checks for disk channel hardware and cable problems). Some
drives do not support this function, resulting in false errors (disable this function if the drives
do not support this function).
In a dual controller configuration (Active-Active or Active-Passive mode), a change to this
setting on either controller is automatically updated on the other controller.
To configure the SCSI disk channels:
1. Select Configuration Menu from the System Menu and press Enter.
The Configuration Menu should now display (Figure 31).
2. Select Channel Configuration and press Enter.
The Channel Configuration screen should now display (Figure 59).