HP StorageWorks 2300 Disk System - Manual (Page 21)

Product Description 21
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BCC circuitry provides the following functions:
■ Bus configuration (see “Setting DIP Switches” in Chapter 3)
■ Bus expansion (LVD)
■ SCSI environmental services (see page 17)
■ System fault detection
A BCC filler panel (Figure 5) replaces the second BCC when redundancy is not
required.
Caution The BCC filler panel maintains even cooling inside the disk
system when the second BCC is not present. A BCC filler panel
must be installed if the BCC is removed.