3-18AcerAltos 21000 System Guide3.3 SCSI Backplane BoardThe SCSI backplane board provides a convenient interface betweenthe SCSI drives and the system board. It includes eight SCSI driveslots to accommodate the drive trays and two SCSI channels toconnect to the system board or SCSI controller board.3.3.1 FeaturesThe backplane board has the following major features:• “Hot-swap” feature that allows replacement of a defective harddrive even while the system is in full operation. This featurerequires a RAID controller board and RAID drivers.• 2 channel configurations which support 4 SCSI hard drives perchannel configuration• Indicates hard disk drive failure through a front panel board LED• Supports ultra-2 SCSI SCA (Single Connector Attachment) diskdrives• SCSI ID strapping that allows wide SCSI HDD ID configurationthrough the backplane switches, instead of configuring theindividual drive IDs
