Global detach policy


The global detach policy must be selected when Dynamic MultiPathing (DMP) is used to manage multipathing on Active/Passive arrays, This ensures that all nodes correctly coordinate their use of the active path.

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.