Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

Use dynamic SRDF controls (createpair, deletepair, swap_personality, movepair, and failover -establish actions) to create and manage diskless device relationships.

The following rules apply for these operations:

• A diskless SRDF device can only be configured on a Fibre or GigE SRDF director.
• A createpair action is blocked when both sides are diskless devices.
• The createpair and movepair actions are blocked if the action results in a mixture of diskless and non-diskless devices in an SRDF group containing devices in asynchronous mode.
• The createpair, movepair, swap_personality, and failover -establish actions will be blocked if the action will result in a violation of the allowable SRDF modes as outlined in Control and set restrictions for diskless devices in cascaded SRDF.
• The createpair action is blocked if the action results in an R1->R21->R2 relationship where the R1 and the R2 are the diskless devices.