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

Disk mirroring

In data storage, disk mirroring or RAID1 is the replication of logical disk volumes onto separate physical hard disks in real time to ensure continuous availability...

 feature from Hitachi

Hitachi, Ltd.

is a Japanese multinational conglomerate headquartered in Marunouchi 1-chome, Chiyoda, Tokyo, Japan. The company is the parent of the Hitachi Group as part of the larger DKB Group companies...

 storage arrays available for both open system

Open system (computing)

Open systems are computer systems that provide some combination of interoperability, portability, and open software standards. The term was popularized in the early 1980s, mainly to describe systems based on Unix,...

s and IBM z/OS

Z/OS

z/OS is a 64-bit operating system for mainframe computers, produced by IBM. It derives from and is the successor to OS/390, which in turn followed a string of MVS versions.Starting with earliest:*OS/VS2 Release 2 through Release 3.8...

. Truecopy is an implementation of IBM's PPRC

Peer to Peer Remote Copy

Peer to Peer Remote Copy or PPRC is a protocol to replicate a storage volume to another control unit in a remote site. Synchronous PPRC causes each write to the primary volume to be performed to the secondary as well, and the I/O is only considered complete when update to both primary and secondary...

 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
  Veritas Cluster Server
  Veritas Cluster Server is a High-availability cluster software, for Unix, Linux and Microsoft Windows computer systems, created by Veritas Software...
  
   (VCS) agent for Hitachi
  Hitachi, Ltd.
  is a Japanese multinational conglomerate headquartered in Marunouchi 1-chome, Chiyoda, Tokyo, Japan. The company is the parent of the Hitachi Group as part of the larger DKB Group companies...
  
   TrueCopy

See also

• Storage replication
• IBM Peer to Peer Remote Copy
  Peer to Peer Remote Copy
  Peer to Peer Remote Copy or PPRC is a protocol to replicate a storage volume to another control unit in a remote site. Synchronous PPRC causes each write to the primary volume to be performed to the secondary as well, and the I/O is only considered complete when update to both primary and secondary...
  
   (PPRC)
• IBM Global Mirror
  Global Mirror
  Global Mirror is an IBM technology that provides data replication over extended distances between two sites for business continuity and disaster recovery. If adequate bandwidth exists, Global Mirror provides an recovery point objective of as low as 3-5 seconds between the two sites at extended...
  
  
• IBM Extended Remote Copy
  Extended Remote Copy
  Extended Remote Copy or XRC is an IBM zSeries and System z9 mainframe computer technology for data replication. It combines supported hardware and z/OS software to provide asynchronous replication over long distances...
  
   (XRC)
• EMC SRDF
  SRDF
  SRDF is a family of EMC products that facilitates the data replication from one Symmetrix storage array to another through a Storage Area Network or IP network....
  
  (Symmetrix Remote Data Facility)