Glossary - Hitachi AMS2100 User Manual

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A B C D E F
Hitachi AMS 2000 Family Copy-on-Write SnapShot User Guide
This glossary provides definitions for replication terms as well as
terms related to the technology that supports your Hitachi AMS
array. Click the letter of the glossary section to display the related
page.
A
array
A set of hard disks mounted in a single enclosure and
grouped logically together to function as one contiguous
storage space.
asynchronous
Asynchronous data communications operate between a
computer and various devices. Data transfers occur
intermittently rather than in a steady stream. Asynchronous
replication does not depend on acknowledging the remote
write, but it does write to a local log file. Synchronous
replication depends on receiving an acknowledgement code
(ACK) from the remote system and the remote system also
keeps a log file.
B
background copy
A physical copy of all tracks from the source volume to the
target volume.
bps
Bits per second. The standard measure for data transmission
speeds.
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