Explanation
If volume protection is enabled, and the volume has
received I/O within the defined volume protection time period, then
the command will fail.
This behaviour is not changed by the volume
being mapped/unmapped.
The force flag does not affect this
policing behaviour. For example, the force flag does not override
the policing.
User Response
Ensure no host I/O is being sent to the volume and
ensure you have waited for the defined volume protection time period
or disable volume protection.