Is SANworks Data Replication Manager Required?
No. It is not a requirement that a Data Replication Manager configuration be present to use EVM.
Planning Use of EVM with Data Replication Manager
When used with Data Replication Manager (DRM), EVM supports clone and snapshot replication of target site units only. EVM does not support replication of units at the initiator site.
Additionally, the DRM configuration must use the synchronous transfer mode. This ensures that data is written to the target site disks before an EVM BCV is created. Refer to DRM documentation for information on how to enable synchronous mode.
About SANworks Data Replication Manager
SANworks Data Replication Manager provides a disaster-tolerant solution through the use of hardware redundancy and data replication across sites that are separated by some distance.
An initiator site is where primary data processing occurs. A target site is used for data replication. Since data processing occurs at the initiator site, the data is replicated to the target site. If a significant failure happens to the initiator site, then data processing can be resumed at the target site where the data is intact.
Peer-to-Peer Remote Copy Function. Data Replication Manager uses the peer-to-peer remote copy function of the HSG controller and array controller software to achieve data replication. HSG controller pairs at the initiator site are connected to HSG controller pairs at the target site.
Remote Copy Set. A peer-to-peer remote copy set consists of units at the initiator site and the remote target site. As data is written to a unit at the initiator site, it is written to the remote unit at the target site. A unit can be a single disk, a storage set, mirror set or RAID set.