Dell PowerVault MD1120 - Manual (Page 14)

14
About Your System
Enclosure Management Module (EMM)
Each EMM provides data path and enclosure management functions for your
enclosure, including:
• Monitoring and controlling enclosure environment elements
(temperature, fans, power supplies, and enclosure LEDs)
• Controlling access to the physical disks
• Communicating enclosure attributes and states to the host server
NOTE:
At least one EMM must be installed in the enclosure. If only one EMM
is installed, it must be in the primary EMM bay (see Figure 1-4) and a blank
module cover must be installed in the secondary EMM bay (see "Installing an
EMM Module Cover in an Empty Bay" on page 34).
Figure 1-5 shows a single EMM as it appears from the rear of the enclosure.
The EMM connects to the enclosure via the enclosure midplane (see
"Removing and Installing an EMM" on page 32). EMM connectors and
components are shown in Figure 1-5 and include:
• Debug port (Dell use only)
• SAS port connector (In)
• SAS port connector (Out)
• Three LEDs (In Port Link, Out Port Link, and EMM Status)
For a description of each component on the front panel of the EMM, see
Table 1-4. For an explanation of how to connect the enclosure using the
EMM ports, see "Operating Your Storage Enclosure" on page 21.
Figure 1-5. EMM External Panel
1 2 3 4 5 6