Storage Mirroring Evaluation Guide

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1.2.1 Mirroring
Mirroring is the process of transmitting user-specified data from the source to the target so that
an identical copy of data exists on the target. When HP OpenView Storage Mirroring initially
performs mirroring, it copies all of the selected data including file attributes and permissions.
Mirroring creates a foundation upon which HP OpenView Storage Mirroring can efficiently
update the target machine by replicating only file changes.
If subsequent mirroring operations are necessary, HP OpenView Storage Mirroring can mirror
specific files or blocks of changed data within files. By mirroring only files that have changed,
network administrators can expedite the mirroring of data on the source and target machines.
Mirroring has a defined end point - when all of the selected files from the source have been
transmitted to the target. When a mirror is complete, the target contains a copy of the source
files at that point in time.
Source
7/16/02
7/14/02
All files can be mirrored
Checksums can calculate which blocks
need to be mirrored
Different files can
be mirrored
Identical files are not mirrored
New files are mirrored
Flexible mirroring options allow you to choose
which files are mirrored from the source to the target.
Target