SGI InfiniteStorage 4000 Series Podręcznik Użytkownika Pobierz pdf (Strona 37)

Environmental Status Modules (ESMs)

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Figure 2-5 InfiniteStorage 4000 RAID Controller Enclosure Front and Rear Components

Environmental Status Modules (ESMs)

The expansion enclosures contain environmental status modules (ESMs) instead of

RAID controllers (see Figure 2-6). 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 32.

Front View

1. Drive Canister

2. Alarm Mute Button

3. Link Rate Switch

Back View

4. Battery Canister

5. Controller A (Inverted)

6. Power-Fan Canister

7. Power Connector

8. Power Switch

9. Host Channels

(two or four)

10. Controller B

11. Ethernet Ports

12. Serial Port

13. Dual-ported Drive

Channel

14. Tray ID

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 121 122

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SGI InfiniteStorage 4000 Series Podręcznik Użytkownika Strona 37