Silicon Graphics Total Performance 9300, User Manual

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Environmental Status Modules (ESMs)
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Environmental Status Modules (ESMs)
The expansion enclosures contain environmental status modules instead of 2882 RAID
controllers (see Figure 2-5). Each environmental status module contains an
environmental services monitor board and two slots for SFPs (small form-factor
pluggables). The environmental services monitor board is the interface between the
controller enclosure and the expansion enclosure, and it monitors expansion enclosure
status. If there are internal problems in the expansion enclosure, the environmental
services monitor board lights the appropriate fault LED. For more information about this
LED, see “Checking the Indicator Lights” on page 34.
Figure 2-5
Environmental Status Modules
ESM ESM