Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

Recovering from transient faults without reconfiguration: Cascaded SRDF/Star

About this task

The following image shows the SRDF states when links to the asynchronous target site are down:

The SRDF devices are now in the Suspended state.

1. Display the state the state of SRDF devices and the SRDF links that connect them using the symrdf list command.

   See Table 1 for a list of symrdf list command options.

   The next step varies depending on the state of the links to the asynchronous target site (London).

   • If the links to the asynchronous target are in the TransmitIdle state, proceed to Step 2.
   • If the links to the asynchronous target are in the PathFail state, skip to Step 3.
2. Transition links to the asynchronous site to the PathFail state using the symstar -cg CgName disconnect -trip command.

   symstar -cg StarGrp disconnect -trip -site London

3. Issue the symrdf list command to verify the configuration is now has the following states:

   Synchronous target site (NewJersey): Protected

   Asynchronous target site (London): PathFail

   STAR state: Tripped

4. From the Star control host at the workload site, issue the symstar -cg CgName reset command to clean up any internal metadata or cache remaining at the asynchronous site after the transient fault occurred.

   To clean up cache and metadata for CG StarGrp at site London:

   symstar -cg StarGrp reset -site London

   The following image shows the resulting SRDF/Star states: