Typical Setup

Clustering in an TrueCopy environment typically consists of the following hardware infrastructure:

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  The primary array comprising one or more P-VOL hosts directly attached via SCSI or Fibre Channel to a Hitachi array containing TrueCopy P-VOL volumes.

  The secondary array comprising one or more S-VOL hosts directly attached via SCSI or Fibre Channel to a second Lightning array containing TrueCopy S-VOL devices. These devices are paired with the P-VOL devices in the primary array.

These hosts and the array must be at a significant distance apart from the primary side to survive a disaster that may occur there.

  Network heartbeats, using LLT or TCP/IP, between the two data centers to determine their health.

  In a replicated data cluster environment, all hosts are part of the same cluster. You must connect them by dual, dedicated networks that support LLT.

  In a global cluster environment, you must attach all hosts in a cluster to the same array.