Port module
Port module connects various types of front-end host ports, such as the
front-end host ports of SAS, FC, and iSCSI.
Power failure
protection
When the external power failure occurs, the alternating circuit (AC)
power entry module in the OceanStor storage system can use the battery
to supply power. This ensures that dirty page in cache can be written
into the coffer safely and avoids data inconsistency caused by data loss.
Primary Storage
Controller
The controller that plays a leading role in controlling the management
is the primary storage controller. It can perform relevant management
operations on the controller enclosure.
Primary/
Secondary
switchover
A procedure during which the two controllers of the OceanStor storage
system change their master/slave states.
Prior controller
For the application server LUN, prior controller means that the working
controller is the owner controller of the corresponding array LUN.
Pseudo devices
The pseudo devices used by users after the multi-path management
software shields local devices.
R
RAID group
failure
The number of faulty member disks in a RAID group exceeds the
maximum number, which causes the failure of the group.
RAID level
The application of different redundant types in the logical drive. The
RAID level can improve the fault tolerance and performance and reduce
the available capacity of the logical drive. You must specify a RAID
level for each logical drive.
Reconstruct
To restore the data in a member disk, when the member disk in a RAID
group is faulty.
Reconstruct hot-
spare disk
To restore the data from the faulty member disk in a RAID group to the
spare disk.
Reconstruct
member disk
To restore the data from the faulty disk to the new disk after you replace
a faulty member disk in a RAID group with a new one.
Reconstruction
A function of the OceanStor storage system. It refers to the process of
restoring the data saved in the faulty member disk in a RAID group.
Redhat package
manager
Redhat package manager widely applied in Linux.
Redundancy
The inclusion of extra components of a given type in a system (beyond
those required by the system to carry out its function) for the purpose
of enabling continued operations in the event of a component failure.
OceanStor N8500 Clustered NAS Storage System
Installation Guide (for T Series V100R005)
C Glossary
Issue 02 (2015-09-22)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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