Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

Switch workload site: keep asynchronous site's data

About this task

In the following image, the workload site (NewYork) has been lost:

From a Star control host at the asynchronous target site (London), perform the following steps to:

• Switch the workload site to London
• Keep the data from the asynchronous target site (London):

1. If London is in a Protected state, issue the disconnect command:

   symstar -cg StarGrp disconnect -trip -site London 

2. If the disconnect leaves London in a CleanReq state, issue the cleanup command:

   symstar -cg StarGrp cleanup -site London

3. Issue the switch command to switch the workload site to the asynchronous target site (London) and keep the asynchronous target's (London) data:

   symstar switch -cg StarGrp -site London -keep_data London

4. The London site is at asynchronous distance from both NewYork and NewJersey. SRDF/Star supports only one asynchronous site.

   When the NewYork site is repaired, you cannot connect and protect NewYork without switching the workload back to a configuration that has only one asynchronous site (NewYork or NewJersey).

   However, you can connect to NewYork. The connect action sets the mode to adaptive copy disk and brings the devices to RW on the SRDF links.

   Issue two connect commands to connect the workload site (London) to both target sites (NewJersey and NewYork):

   symstar -cg StarGrp connect -site NewJersey
   symstar -cg StarGrp connect -site NewYork

5. Issue a protect command to protect one target site (NewJersey):

   symstar -cg StarGrp protect -site NewJersey

   The following image shows the resulting SRDF/Star configuration:

   

   If data is protected with BCV devices, make a TimeFinder/Clone or TimeFinder/Mirror copy.

   Step 7: (Optional) Add BCV devices to the SRDF/Star configuration

   Switch back to the original workload site: concurrent SRDF/Star describes the steps to switch the workload site back to the initial site (NewYork).