Huawei OceanStor N8500 T Series Installation Manual page 371

OceanStor N8500 Clustered NAS Storage System
Installation Guide (for T Series V100R005)
Port module
Power failure
protection
Primary Storage
Controller
Primary/
Secondary
switchover
Prior controller
Pseudo devices
R
RAID group
failure
RAID level
Reconstruct
Reconstruct hot-
spare disk
Reconstruct
member disk
Reconstruction
Redhat package
manager
Redundancy
Issue 02 (2015-09-22)
Port module connects various types of front-end host ports, such as the
front-end host ports of SAS, FC, and iSCSI.
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.
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.
A procedure during which the two controllers of the OceanStor storage
system change their master/slave states.
For the application server LUN, prior controller means that the working
controller is the owner controller of the corresponding array LUN.
The pseudo devices used by users after the multi-path management
software shields local devices.
The number of faulty member disks in a RAID group exceeds the
maximum number, which causes the failure of the group.
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.
To restore the data in a member disk, when the member disk in a RAID
group is faulty.
To restore the data from the faulty member disk in a RAID group to the
spare 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.
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 widely applied in Linux.
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.
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