Glossary
Manual No. SA67-0049-01
Glossary-15
NVRAM
Non-Volatile Random Access Memory, a memory unit equipped with a
battery so that the data stays intact even after the main power had been
switched off.
Offline
A
Logical Drive
is in an “offline” state if no data can be read from it or
written to it. Offline does not apply to physical disk drives. System
commands issued to offline logical drives are returned with an error status;
no operations can be performed on offline logical drives. See also
Logical
Drive
States
,
Critical
State
, and
Online
OLTP
Online Transaction Processing, computer processing where the computer
responds immediately to user requests.
OS
Operating System, software that manages the system resources and provides
the operating environment for application programs.
Parity
A method of providing complete data redundancy while requiring only a
fraction of the storage capacity of mirroring. The data and parity blocks are
divided between the disk drives in such a way that if any single disk drive is
removed or fails, the data on it can be reconstructed using the data on the
remaining disk drives. The parity data may exist on only one disk drive or be
distributed between all disk drives in a RAID group. See also
Rotated XOR
Redundancy
.
Содержание Global Array Manager
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