Ultra Scsi Bus Termination; I/O Interface Board; Bus Configurations - Intergraph InterRAID-8e Hardware User's Manual

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Ultra SCSI Bus Termination

The Ultra SCSI bus is the pathway over which disk drive data and status signals transmit
between the MegaRAID controller and the disk array cabinet. To function properly, the bus
must be terminated at both ends. The MegaRAID controller in the host system provides
termination for one end of the bus. The I/O interface boards in the disk array cabinet
provides termination for the other end.

I/O Interface Board

The I/O interface board connects between the disk array's bus and the MegaRAID controller
board via two 68-pin very high density (VHD) SCSI connectors. The connectors are labeled
Channel 0 and Channel 1.
Channel 0

Bus Configurations

The InterRAID-8e cabinet uses Ultra Wide SCSI cable configurations for single-bus or
dual-bus operation. Separate internal modules in the disk array cabinet define the bus
configuration.
u
The InterRAID-8e with the dual-bus module provides two separate channels for the
cabinet's disk drive slots. The top or left cabinet slots connect to one of the channels,
and the bottom or right slots connect to the other channel.
u
The InterRAID-8e with the single-bus module provides one channel for the cabinet's
disk drive slots.
I/O Interface
Board
Channel 1