Figure 1 Physical replication using HP 3PAR Remote Copy

HP 3PAR Remote Copy-mirrored disks have a read/write-enabled primary (local) disk and a read-only secondary (remote) disk. Current cluster software products cannot distinguish between read-only and write-enabled disks, and cannot enable disk access if the disk is not write-enabled during the server boot process.

With HP 3PAR Cluster Extension, the consistency and concurrency of the data can be checked when the resource comes online in the remote data center. The capability for restoring the application service after the failure of the server, the array, or the datacenter is called disaster tolerance.

Automated redirection of mirrored disks

Storage systems with HP 3PAR Remote copy automatically redirect the mirroring destination. This means that HP 3PAR Remote Copy almost instantaneously swaps the primary/secondary relationship of Remote Copy volume group members if the application must access the destination disk (virtual volume). This feature ensures that the disks are always accessible when failover to a remote data center occurs.

Metropolitan distance support

Determined by the distance and latency requirements for the HP 3PAR Remote Copy Software and cluster server.

Automated redirection of mirrored disks

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