Hitachi TrueCopy

Hitachi TrueCopy, formerly known as Hitachi Open Remote Copy (HORC) or Hitachi Remote Copy (HRC) or Hitachi Asynchronous Remote Copy (HARC), is a remote mirroring feature from Hitachi Data Systems storage arrays available for both open systems and IBM z/OS. Truecopy is an implementation of IBM's PPRC protocol.

Synchronous TrueCopy causes each write to the primary volume to be performed to the secondary as well, and the I/O is considered complete only when updates to both primary and secondary have completed. Asynchronous TrueCopy stores time-stamped IO packets in the primary disk array and transfers them to the secondary array subject to link bandwidth. When the primary array's buffer is exhausted, it starts flagging tracks on the primary to be duplicated to the secondary when bandwidth permits.

Related products:

• Hitachi Raid Manager, software to control TrueCopy operations
• Hitachi Command Control Interface (CCI)
• Veritas Cluster Server (VCS) agent for Hitachi TrueCopy

See also

• Storage replication
• IBM Peer to Peer Remote Copy (PPRC)
• IBM Global Mirror
• IBM Extended Remote Copy (XRC)
• EMC SRDF (Symmetrix Remote Data Facility)

Hitachi Divisions and subsidiaries Current Clarion Hitachi Cable Hitachi Cable Manchester Hitachi Canadian Industries Hitachi Capital Hitachi Construction Machinery Hitachi Construction Machinery (Europe) Hitachi Consulting Hitachi Data Systems (BlueArc) Hitachi Electronics Hitachi Maxell Hitachi Medical Systems Hitachi Rail Horizon Nuclear Power JECS Former Euclid Trucks1 Fabrik1 Hitachi Global Storage Technologies2 Joint ventures and shareholdings Agility Trains (40%) Alaxala Networks (60%) GE Hitachi Nuclear Energy (40%) Hitachi-LG Data Storage Japan Display (10%) NEC Casio Mobile Communications (9.26%) Nippon Columbia (18.21%) Renesas Electronics (30.62%) Telcon Construction Solutions (60%) Products, services and standards Current ALiS D-VHS EMIEW Hitachi Adaptable Modular Storage 2000 Hitachi DX07 Hitachi Starboard Locomotives Hitachi Magic Wand Multiple units Hitachi 917 Hitachi SR8000 Hitachi Travelstar Hitachi TrueCopy LS-R M8 Stacked Volumetric Optical Disk SuperH Universal Storage Platform Defunct H8 Family HD64180 HITAC HITAC S-810 Hitachi 6309 Hitachi Deskstar Hitachi Flora Prius Hitachi G1000 Hitachi Hatsukaze Hitachi SR2201 Hitachi T.2 Hitachi TR.1 M6 Microdrive People Namihei Odaira Kenichi Ohmae Hiroaki Nakanishi Takashi Kawamura Places Hitachi Kashiwa Soccer Stadium Hitachi, Ibaraki Hitachi Tower Tsūtenkaku Other DKB Group HDMI Licensing Hitachi 3Tours Championship Hitachi Data Systems History The Hitachi Foundation Hindu Hitachi Scholarships Hitachi SunRockers Hitachi Rivale Kashiwa Reysol 1Now integrated into other Hitachi divisions or business groupings 2Sold Category Commons