32 IBM System Storage N series Hardware Guide“Stretching” the HA-pair (also called the SFO pair) by using the c0x ports is qualified withoptical SFPs up to a distance of 30 m. Beyond that distance, you need the FC-VI adapter.When the FC-VI card is present, the c0x ports are disabled.3.2.3 IBM N62x0 series technical specificationsThis section provides more details for the N62x0 systems.IBM N62x0 series cooling architecture has these characteristics: Three fan FRUs per chassis– Each FRU contains two air movers for a total of six fans Same fan FRUs cool both controllers Fans speed regulated by service processor– Processors can force higher fan speed to provide adequate cooling if SP is offline Fail-safe architecture– Separate paths from controller to each fan FRU Fan FRU contains EEPROM with fan FRU information Both controllers try to set fan speeds– Final fan speed is the maximum speed requested by either controller One failed fan allowed per chassis– Controller runs indefinitely with single failed fan– 2-minute shutdown rule applies if the fan FRU is removed• Data ONTAP initiates the shutdown Power supplies (PSUs) cool themselves– Do not contribute to controller cooling– System runs indefinitely on one PSU– No 2-minute shutdown rule for removed PSUNew service processor (SP) enhances manageability and RASM details: SP available through Ethernet or serial console– Shares management wrench port with e0M for Ethernet• Similar to RLM and e0M on IBM N60x0– Toggle from serial console into SP with CTRL-G– Toggle back to serial console with CTRL-D– Actively manages some hardware– Fans– FRU tracking– Advanced sensor management SP is used to create cores, and no NMI button is presentTip: Always use an FCVI card in any N62xx MetroCluster, regardless if it is a stretched orfabric-attached MetroCluster
