NetWorker 19.7 Snapshot Management Integration Guide

VMAX3 SRDF/S support

SRDF/S is a VMAX feature that maintains a synchronous, realtime copy of data at the LUN level between two VMAX storage arrays, one of which is local and the other remote.

You can configure ProtectPoint on a remote VMAX array with SRDF/S functionality, by associating a source LUN (referred to as R1) on the local array with a source LUN (R2) on the remote array. The SRDF/S software maintains continuous synchronization of the two sources by copying all the changes on one LUN device to the other.

The following SRDF/S requirements and support for snapshot operations apply to SRDF/S configurations:

• At runtime NetWorker automatically determines the state of the SRDF/S link. NetWorker does not require you to manually configure environment variables or application variables.
• If no SRDF/S link is available at the beginning of an operation, the backup or restore operation fails.
• NetWorker does not support any changes to the SRDF/S link mode made during backup or restore operations.
• If the SRDF link is in a failed over or failed back state, the snapshot operations fail.
• Mirror replication cannot transition between asynchronous and synchronous modes during any NSM operation. The mode must remain constant.
• NetWorker does not support the creation of snapshots of file systems or of volume groups that cross SRDF/RA groups.
• NetWorker supports only single-hop remote connections.

Rollbacks in the SRDF/S environment provides details on rollback operations in this environment.