The global detach policy is the traditional and default policy for all nodes on the configuration. If there is a read or write I/O failure on a slave node, the master node performs the usual I/O recovery operations to repair the failure, and, if required, the plex is detached cluster-wide. All nodes remain in the cluster and continue to perform I/O, but the redundancy of the mirrors is reduced. When the problem that caused the I/O failure has been corrected, the disks should be re-attached and the mirrors that were detached must be recovered before the redundancy of the data can be restored.