E
Expand the
member disk of
RAID group
dynamically
To add member disk in a RAID group without interrupting the normal
services of RAID group.
Expander module
A component used for expanding.
Expansion master
LUN
The first LUN composing the connected LUNs is called expansion
master LUN.
F
Failed RAID
group
The number of failed member disk in a RAID group exceeds the
maximum number, which causes data loss.
Failure tolerance
The storage system can provide storage resources normally (system
performance may be compromised) when its one or multiple
components fail.
Field replaceable
unit (FRU)
A module or component which will typically be replaced in its entirety
as part of a field service repair operation. Any entity that can be replaced
by a user in the field. Examples of this type of FRU might include:
backplane (the Shelf housing, for all practical purposes), PEM/fan
module, optical module, and battery module. (Not all FRU supports hot
swapping.)
Firmware
The program that is embedded in a programmable non volatile memory.
Fragment
The free physical space that has not been divided among different LUNs
on a disk.
Free disk
A hard disk which is available in the OceanStor storage system.
Free hot-spare
disk
A hot-spare disk that is available.
Front-end host
port
The port on the controller subrack to connect to the application server
and transmit service data. There are three types of the front-end host
port: SAS, FC and iSCSI.
G
Gateway
The entrance node on another network.
Gateway binding
A mode of binding an application server and the network entrance node
it is located in.
Global hot-spare
disk
A type of hot spare disk. A global spare disk can serve as the spare disk
for multiple RAID groups of an array while a local hot spare disk can
only serve as the spare disk for only one RAID group.
B Glossary
OceanStor S2600 Storage System
Command Reference
B-4
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Copyright © Huawei Technologies Co., Ltd.
Issue 07 (2010-05-20)