HA storage (high-availability storage)
High-availability storage (HA storage) is a storage system that is
continuously operational or provides at least 99% uptime.
Redundancy is a key feature of HA storage, as it allows data to be kept in more than one place
and eliminates a single points of failure (SPOF). HA
storage systems are often used in virtual server
environments as a security feature to protect critical virtual
HA storage arrays require at
least two controllers in case one
is lost. For disaster
recovery, HA storage requires a secondary storage system to hold critical data and applications
the business needs if its primary storage system
goes offline. This is often done by replicating data to another
storage system at another site.
See also: high-availability,
Contributor(s): Sarah Wilson
This was last updated in November 2013
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