PACKARD BELL MH4000 - Manual (Page 35)

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Features
SCSI Drive Hot-swap Backplane
The SCSI backplane is an integral part of the chassis.
The backplane provides control signals for six SCSI
peripheral devices. The backplane receives control
signals from the system board ultra wide SCSI-2
controller channel.
The backplane has two main functions: SCSI drive
control and system data logging. Drive status is
monitored to detect failing drives and to control LED
indicators. The backplane features are:
■ Inserting and removing of hard drives while power
is on (referred to as “hot swap”)
■ Simplified cable management
■ SCA connectors to simplify inserting and removing
hard drives
■ SCSI management of fault LEDs.
Each backplane supports SCSI drives with SCA
connectors.