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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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SRDF/Metro restrictions when adding devices

The following restrictions apply when adding devices to SRDF/Metro:
  • An SRDF/Metro group cannot contain a mixture of R1 and R2 devices.
  • The R2 device cannot be larger than the R1 device.
  • The R2 device cannot have device inactive set if it is mapped to a host.
  • The R1 device cannot be device inactive.
  • The devices cannot have User Not Ready set. (Please note that createpair -format requires this when the devices are mapped to a host. It is also allowed if GCM is set on what will become the R1 and the createpair is done with -restore or -invalidate R1.)

  • The following actions are blocked when adding new devices into an existing SRDF/Metro configuration with the -format option:

    • use_bias
    • establish
    • invalidate R1
    • invalidate R2
    • type R1
    • type R2
  • Devices cannot have User Geometry set.
  • RCopy is not supported.
  • Devices cannot be BCVs.
  • Devices cannot be CKD.
  • Devices cannot be RP.
  • Devices cannot be used as the target of a TimeFinder data copy when the RDF devices are RW on the RDF link with either a SyncInProg, ActiveBias or ActiveActive RDF pair state.
  • createpair operations are only allowed for devices with Mobility IDs in SRDF/Metro configurations when both sides of the SRDF pair are running PowerMaxOS 5978. createpair is blocked if the device ID types of each individual RDF device pair are not the same on both sides, that is, both Compatibility or both Mobility.
Devices that are part of an SRDF/Metro configuration cannot:
  • Have User Geometry set
  • Be monitored by SRDF Automated Recovery
  • Be migrated
  • Be part of an SRDF/Star configuration

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