Specifications

5
Components and Subsystems
26
Hot swap
TheRTMcanbehotswapped,andfunctionsastheAMCmoduledoesduringthehot‐swap
process.Thehot‐swaplatchstatusisreadbytheMMC.HotswappingmeansthattheRTM
canberemovedorinsertedwithoutshuttingdownanyotherpartoftheCPMortheplatform.
Exception:DonotremovingtheRTMiftheCPMhasmountedarootfi lesystemon:
•TheharddiskdriveontheRTM
•ASASharddiskdriveontheAMC,becausetheSASharddiskdriveisaccessibleonly
throughtheRTMSAS/SATAcontroller
•AremoteharddiskdriveconnectedbycabletoaSAS/SATAconnectorontheRTM
•AremoteNFSserveraccessibleonlythroughanSFPportontheRTM
WARNING!DonotremovetheRTMiftheCPMisaccessingtheoperatingsystemviatheRTM.The
CPMwillhangifitlosesaccesstotheOSrootfilesystem.
SeetheATCA‐4500,ATCA‐4550,ATCA‐4555CPMReferencefordetailsabouthotswappingthe
RTM.
Reset
TheMMCsupportstheColdResetIPMIcommand,whichcanbeissuedfromtheCPM
(specifyingtheFRUIDthatcorrespondstotheRTM).SeetheATCA‐4500,ATCA‐4550,
ATCA‐4555CPMReferenceforthecorrectFRUID.AnRTMresetincludestheSAS/SATA
controller,thePM8380multiplexer/link extender,andthealarmCPLD.
ToresetboththeCPMandtheRTM,usetheresetbuttonontheRTMfaceplateasdescribed
inResetbuttononpage21.
Connectivity records for interface compatibility
TheRTMsuppliespoint‐to‐pointconnectivityrecordsforseveralinterfacestolettheCPM
determineinterfacecompatibility.TheCPMmaynotgrantanE‐Keytoenableitsportifthe
correspondingRTMportisincompatible.TheRTMprovidesconnectivityrecordstodescribe
theseinterfaces:
•TwoSASports
•Onex1orx4PCI‐Expressport
•TwoSerDesgigabitEthernetports
TheRTMconnectivityrecordscomplywiththerecordsdefinedforAMCsinthePICMGAMC.0
R2.0AdvancedMezzanineCardBaseSpecification.