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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Restore for the SRDF/Metro session

About this task

A restore makes the devices in the Smart DR session RW on the SRDF link and initiates an incremental re-synchronization of data from the MetroR2 to the MetroR1. While the re-synchronization is ongoing, the SRDF/Metro state is SyncInProg and the copy direction is R1 <– R2.

Figure 1. Restore for the SRDF/Metro session
A restore temporarily makes the MetroR1 inaccessible to the host while the symmdr restore command is running. Once the restore command completes successfully:
  • the MetroR1 is accessible to the host
  • Once the MetroR1 and MetroR2 contain identical data :
    • the MetroR2 becomes accessible to the host
    • the SRDF/Metro state is ActiveActive
    • the copy direction is R1 < – > R2
  • The DR service state remains Inactive.

Examples

The following example shows the result of the symmdr –sid 702 –name metrodr1 restore -metro command on array 702 with DR mode is Asynchronous: 
symmdr –sid 702 –name metrodr1 restore -metro

A MetroDR Metro 'Restore' operation is in progress
for 'metrodr1' Please wait...

    Update environment attributes..................................Started.
      MetroR1_ArrayID: 000197801702, Metro_RDFG  : 0115, DR_RDFG     : 0033
      MetroR2_ArrayID: 000197600056, Metro_RDFG  : 0119, DR_RDFG     : 0076
      DR_ArrayID     : 000197900048, MetroR1_RDFG: 0028, MetroR2_RDFG: 0044
      DR_Mode        : Asynchronous, MetroDR Devs: 6
    Update environment attributes..................................Not Needed.
    Start Data Repl (Host Access [MetroR1:Enable,MetroR2:Enable])..Started.
    Start Data Repl (Host Access [MetroR1:Enable,MetroR2:Enable])..Done.

The MetroDR Metro 'Restore' operation successfully executed
for 'metrodr1'.

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