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Hitachi Command Control Interface (CCI) User and Reference Guide 3
1.2.2 Hitachi ShadowImage
The ShadowImage data duplication feature enables you to set up and maintain multiple
copies of logical volumes within the same storage system. The RAID-protected ShadowImage
duplicates are created and maintained at hardware speeds. ShadowImage operations for
UNIX/PC server-based data can be performed using either the Command Control Interface
(CCI) software on the UNIX/PC server host, or the ShadowImage software on Storage
Navigator.
The Hitachi CCI software on the UNIX/PC server displays ShadowImage information and
allows you to perform ShadowImage operations by issuing commands from the UNIX
command line or by executing a script file. The CCI software interfaces with the storage
system through a dedicated LU called a command device. The ShadowImage remote console
software also displays ShadowImage information and allows you to perform ShadowImage
operations using a Windows-based GUI. The ShadowImage software interfaces with the RAID
storage system via its service processor (SVP).
ShadowImage can be used in conjunction with Hitachi TrueCopy to maintain multiple copies
of critical data at your primary and/or secondary (remote) sites. This capability provides
maximum flexibility in data backup and duplication activities.
For details on ShadowImage operations, please refer to the ShadowImage User’s Guide for
the storage system (e.g., Hitachi TagmaStore
®
USP/NSC ShadowImage User’s Guide).
Note: The 7700E data duplication feature/software is called Hitachi Open Multi-RAID
Coupling Feature (HOMRCF).
1.2.3 Hitachi Universal Replicator
Universal Replicator (UR) provides a RAID storage-based hardware solution for disaster
recovery which enables fast and accurate recovery for large databases spanning multiple
volumes. Universal Replicator provides update sequence consistency for user-defined journal
group (i.e., large database) as well as protection for write-dependent applications in the
event of a disaster. Universal Replicator enables you to configure and manage highly reliable
data replication systems by using journal volumes to reduce chances of suspension of copy
operations.
Universal Replicator can be used in conjunction with TrueCopy as part of a 3DC Cascading
Configuration and/or a 3DC Multi-Target Configuration. Universal Replicator can also be used
with ShadowImage to maintain multiple copies of critical data at primary and secondary
(remote) sites. These capabilities provide maximum flexibility in data backup and
duplication activities.
Note: Universal Replicator is available on USP V/VM and TagmaStore USP/NSC (not
9900V/9900).
For details on Universal Replicator operations, refer to the Universal Replicator User’s Guide
for the storage system, or contact your Hitachi Data Systems account team.