Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

SRDF/Star restrictions

GNS Remote Mirroring is NOT supported with SRDF/STAR configurations .
Devices that are part of an RecoverPoint configuration, cannot at the same time, be part of an SRDF/Star configuration.
The RDF groups that are part of an SRDF/Star CG cannot contain any devices that are not part of the SRDF/Star CG.
Devices that are part of a SRDF/Star CG should not be controlled outside of symstar commands.
Devices that are part of an SRDF/Metro configuration cannot at the same time be part of an SRDF/Star configuration.
If any array in a SRDF/Star configuration is running HYPERMAX OS, Solutions Enabler 8.1 or higher is required in order to manage that configuration.
If any array in a SRDF/Star configuration is running PowerMaxOS, Solutions Enabler 9.0 or later is required in order to manage that configuration.
Each SRDF/Star control host must be connected to only one site in the SRDF/Star triangle. An SRDF/Star control host is where the symstar commands are issued.

A minimum of one SRDF daemon must be running on at least one host attached locally to each site. This host must be connected to only one site in the SRDF/Star triangle. The host could be the same as the Star control host but is not required unless using symstar modifycg.
Dell Technologies strongly recommends running redundant SRDF daemons on multiple hosts to ensure that at least one SRDF daemon is available to perform time-critical, consistency monitoring operations. Redundant SRDF daemons avoid service interruptions caused by performance bottlenecks local to a host.
SRDF/A recovery links are required.
SRDF groups cannot be shared between separate SRDF/Star configurations.
R22 devices are required in SRDF/Star environments that include VMAX 10K arrays.
CKD striped metadevices are not supported.
R2 devices cannot be larger than their R1 devices.
Composite groups consisting of device groups are not supported.
Devices enabled as part of consistency groups cannot at the same time be part of an SRDF/Star configuration.
Devices cannot be BCV devices.
Every device must be dynamic SRDF (R1 and R2 capable).
BCV device management must be configured separately.
NOTE:
Dell Technologies strongly recommends that you have BCV device management available at both the synchronous and asynchronous target sites.
With Enginuity 5876.159.102 and higher, a mixture of thin and (non-diskless) thick devices is supported.