TrueCopy overview
A TrueCopy system creates and maintains a mirror image of a production volume at a remote location. Data in a TrueCopy backup stays synchronized with the data in the primary Hitachi Virtual Storage Platform G200, G400, G600 storage system. This happens when data is written from the host to the primary storage system then to the secondary storage system, via the Fibre Channel data path. The host holds subsequent output until acknowledgement is received from the secondary storage system for the previous output.
TrueCopy help topics provide instructions for configuring, operating, maintaining, and troubleshooting a TrueCopy system. For requirements, planning, disaster recovery, and other conceptual and reference information, see the Hitachi TrueCopy® User Guide.
Important: The Device Manager - Storage Navigator (HDvM - SN) GUI displays "Local Storage System" for the system you have accessed on the HDvM - SN server.
As a result, if you access the remote site's HDvM - SN server, the GUI displays information for the pair's remote (secondary) system under "Local Storage System". Likewise, the GUI in this case identifies the storage system connecting to the accessed system as the "Remote Storage System". However, this help uses the terms "primary storage system" or "primary system" for the storage system in which the primary volume (P-VOL) is located in the local site, and "secondary storage system" or "secondary system" for the storage system in which the secondary volume (S-VOL) is located in the remote site, unless otherwise noted.