Dell MD1400 Owner's Manual

Also see for MD1420: Hardware owner's manual

Dell MD1400 Owner's Manual Manual pdf 9 page image

NOTE: At least one EMM must be installed in the enclosure. If only one EMM is installed in theenclosure, it must be installed in the primary EMM bay and a blank must be installed in thesecondary EMM bay. See Installing an EMM blank .Figure 5. Enclosure Management ModuleItem Indicator,Button, orConnectorIcon Description1,2,3,4 SAS port (Input orOutput)Provides SAS connections for cabling the host or an upchainexpansion enclosure and to the next down chain expansionenclosure in a daisy chain.(Single Port, Redundant, and Multi-chain Configuration)5 USB Mini-B (serialdebug port)For engineering use only.6 7-SegmentDisplayDisplay the enclosure location in SAS Chain.Enclosure failover when two EMMs are installedIf two EMMs are installed, a certain degree of failover is offered. Control and monitoring of the enclosureelements can be transferred from one EMM to another in the event of an EMM failure. A failover occurswhenever network communication is ended between an EMM and its peer.In the event of a peer EMM failure, the surviving EMM activates the amber status LED of the failed EMM.The surviving EMM then takes over the responsibility of enclosure management, which includesmonitoring and control of the enclosure LEDs, power supply units, and fans.EMM thermal shutdownIf critical internal temperatures are reached, the enclosure turns off automatically through either athermal shutdown command issued by the EMM firmware or through a command from DellOpenManage Server Administrator.9