IBM 1269-3S2, Installation, Service And User Manual

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Introduction
5
1.3.3 EBOD Module
IBM System Storage DCS9900 3S2 Storage Expansion Units include an enclosure with rear facing bays
which house two EBOD Serial Controller modules (
Figure 1–5 ).
The plug-in EBOD modules have been designed for integration into IBM System Storage DCS9900 3S2
Storage Expansion Units, utilizing SAS interconnections with the host computer system (
Figure 1–6 ).
Processors housed on the EBOD modules provide enclosure management and interface to devices on
the Backplane, PSU, EM and Ops Panel, in order to monitor internal functions. These processors operate
in a master slave configuration to allow failover. The enclosure must be configured with 2 modules.
Figure 1–5 Rear View of Enclosure with AC PSUs and EBOD Modules Installed
Figure 1–6 EBOD Module and Front Panel