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3.4
SCSI Disk Array Backplane Board
The SCSI disk array backplane board (Acer BP-W7) provides a
convenient interface between the SCSI drives and the system board.
It includes seven SCSI drive slots to accommodate the drive trays,
two SCSI channels to connect to the system board or SCSI controller
board, and one SCSI channel out for external devices.
3.4.1
Features
The backplane board has the following major features:
"Hot-swap" feature that allows replacement of a defective hard
drive even while the system is in full operation. This feature
requires a RAID controller board and RAID drivers.
Indicates hard disk drive failure through a front panel board LED
Supports wide SCSI or narrow SCSI disk drives
Supports mixed configuration of both fast-and-wide (16-bit) and
fast-and-narrow (8-bit) SCSI drives in a single channel
Allows 'split' and 'combine' SCSI-channel configurations
SCSI ID strapping that allows wide SCSI HDD ID configuration
through the backplane switches instead of configuring the
individual drive IDs
Supports other external SCSI devices through the SCSI channel
out interface
System Configuration
3-41
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