Home > Storage > PowerMax and VMAX > Storage Admin > Dell PowerMax and VMAX: Non-Disruptive and Minimally Disruptive Migration Best Practices and Operational Guide > Recovery from Failed State
A ‘recover‘ operation is needed after a step in the migration completes with a “failed” state and is not normally required as a part of a migration.
Failed states include: CreateFailed, CutoverFailed, CancelFailed, and CommitFailed. The ‘recover’ command is not used for the MigrFailed state, because that state is auto recovered.
After the condition that caused a migration operation to fail has been corrected (create, cutover, commit, or cancel), a recover operation can be invoked to continue with the migration by:
The administrator must identify the target array and the data migration session name to be recovered.
After an error, the ‘symdm recover’ can be used after correcting the cause of a failed symdm action (create, commit, or cancel) to put the migration into the appropriate state, and then repeat or resume the failed action.
symdm recover –sid 643 –sg APP1
A DM 'Recover' operation is
in progress for storage group 'APP1'. Please wait...
Analyze Configuration...................................................Started.
Source Array:APM00150519204
Target Array:000197900644
Analyze Configuration....................................................Done.
Creating Device(s).........................................................Not Needed.
Update target SG Device(s)...........................................Not Needed.
Create Storage Group(s) on Target...............................Not Needed.
Create Port Group(s) on Target.....................................Not Needed.
Start Data Replication....................................................Started.
Start Data Replication....................................................Done.
The DM 'Recover' operation successfully executed for
storage group 'APP1'.
The following is a recovery from a failed Commit:
symdm recover –sid 643 –sg APP1
A DM 'Recover' operation is
in progress for storage group 'APP1'. Please wait...
Analyze Configuration..............................................Started.
Source Array:APM00150519204
Target Array:000197900644
Analyze Configuration..............................................Done.
Remove Data Replication........................................Started.
Remove Data Replication........................................Done.
The DM 'Recover' operation successfully executed for
storage group 'APP1'.
The following is a recovery from a failed Cancel:
symdm recover –sid 643 –sg APP1
A DM 'Recover' operation is
in progress for storage group 'APP1'. Please wait...
Analyze Configuration.....................................................Started.
Source Array:APM00150519204
Target Array:000197900644
Checking Target devices for IO.......................................Not Needed.
Analyze Configuration.....................................................Done.
Remove Masking View(s) on Target...............................Not Needed.
Remove Data Replication...............................................Started.
Remove Data Replication...............................................Done.
Remove Port Group(s) on Target....................................Started.
Remove Port Group(s) on Target....................................Done.
Remove Storage Group(s) on Target..............................Started.
Remove Storage Group(s) on Target..............................Done.
Rollback update of target SG Device(s)..........................Started.
Rollback update of target SG Device(s)...........................Done.
Remove created Device(s) on Target..................................Started.
Remove created Device(s) on Target..................................Done.
The DM 'Recover' operation successfully executed for
storage group 'APP1'.