Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide

G–4 Compaq StorageWorks Data Replication Manager HSG80 ACS V8.5P Operations Guide

controller A hardware device that uses software to facilitate communications between a

host and one or more storage devices organized in an array. The HS-series

StorageWorks family of controllers are all array controllers.

copying member In a mirrorset, a copying member is a container introduced to the mirrorset

after it has been in use for some amount of time. None of the blocks can be

guaranteed to be the same as other members of the mirrorset. Therefore the

COPYING member is made the same by copying all the data from a

NORMAL member. This is in contrast to NORMALIZING, where all blocks

written since creation are known to be the same.

When all of the blocks on the copying member are the same as those on the

normal member, the copying member becomes a normal member. Until it

becomes a normal member, the copying member contains undefined data and

is not useful for any purpose.

default gateway The default path that a computer or router uses to forward and route data

between two or more networks having different protocols.

device See node and peripheral device.

disaster tolerance Disaster tolerance provides the ability for rapid recovery of user data from a

remote location when a significant event (or disaster) at the primary

computing site occurs.