Virtual Disk Manager, The requested resource is in use, windows server 2012 cluster

recently i faced an issue with attaching EMC symmetrix and Windows server 2012 failover cluster manager. suddenly all disks shows "RAW" file system and when you try to format the disk the following error appears: "the requested resource is in use".

to resolve the issue use the following command:

This command clears the persistent reservation on Disk 1

Clear-ClusterDiskReservation -Disk 1

run the command to all disks that shows RAW .. enjoy :)