ORA-59056
Insufficient number of Oracle Automatic Storage Management (Oracle ASM) instances. Required '%0!s'
Cause
An attempt to run Oracle ASM scrubbing was denied because there were too few Oracle ASM instances running.
Action
Start more Oracle ASM instances and retry the 'alter diskgroup dg scrub' command, or run 'alter diskgroup dg scrub stop' to stop it and finish the current operation.