Dell Storage MD1400 Enclosures Hardware Owner's Manual

Each EMM provides the following data path and enclosure management functions for your enclosure:

• Monitoring and controlling enclosure environment elements such as temperature, fan, power supply units, and enclosure LEDs.
• Controlling access to hard disk drives.
• 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 in the enclosure, it must be installed in the primary EMM bay and a blank must be installed in the secondary EMM bay. See Installing an EMM blank .

Item	Indicator, Button, or Connector	Icon	Description
1,2,3,4	SAS port (Input or Output)		Provides SAS connections for cabling the host or an upchain expansion enclosure and to the next down chain expansion enclosure in a daisy chain.(Single Port, Redundant, and Multi-chain Configuration)
5	USB Mini-B (serial debug port)		For engineering use only.
6	7-Segment Display		Display the enclosure location in SAS Chain.