40 IBM System Storage N series Hardware Guide4.2.2 IBM N series N7950T slot configuration rulesThe following configuration rules apply to the N7950.Vertical I/O slots Vertical slots use custom form-factor cards– Look similar to standard PCIe– Cannot put standard PCIe cards into the vertical I/O slots Vertical slot rules– Slot 1 must have a special Fibre Channel or SAS system board: Feature Code 1079(Fibre Channel) and Feature Code 1080 (SAS)– Slot 2 must have NVRAM8– Slots 11 and 12:• Can configure with a special FC I/O or SAS I/O card: Feature Code 1079 (FC) andFeature Code 1080 (SAS)• Can mix FC and SAS system boards in slots 11 and 12– FC card ports can be set to target or initiatorHorizontal PCIe slots Support standard PCIe adapters and cards:– 10 GbE NIC (new quad port 1 GbE PCIe adapter for N7950T FC1028)– 10 GbE unified target adapter– 8 Gb Fibre Channel– Flash Cache Storage HBAs:– Special-purpose FC I/O and SAS I/O cards, and NVRAM8, are NOT used in PCIe slots4.2.3 N7950T hot-pluggable FRUsThe following items are hot-pluggable: Fans– Two-minute shutdown rule if you remove a fan FRU Controllers– Do not turn off PSUs to remove a controller in dual- controller systems PSUs– One PSU can run the entire system– There is no two-minute shutdown rule if one PSU removed IOXMs are not hot pluggable– Removing the IOXM forces a system reboot– System will not recognize a hot-plugged IOXM
