2
Switched Bunch of
Disks
Switched Bunch of Disks (SBOD) is a device that takes all of the drives that are
operating in a single Fibre Channel-Arbitrated Loop (FC-AL) segment and provides
each drive with access to one or more controllers in a point-to-point fashion. This
action is accomplished in a way that appears to be compliant with the FC-AL-2
protocol. As a result, system firmware changes are not required.
In this document, the FC2610 drive trays and the FC4600 drive trays are referred to as
SBODs in the cabling diagrams. The AT2655 drive trays are identified as SATA
(Serial Advanced Technology). The following figure shows an example of this type of
labeling for drive trays. The DE6900 drive trays and DE6600 drive trays are SBODs
and can be mixed only with FC4600 drive trays. Do not mix FC2600 drive trays with
other types of drive trays on the same loop.
Figure 1 SBOD Labeling in Cabling Diagrams
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