Huawei OceanStor S2600 Command Reference Manual page 268

B Glossary
Overload
protection
Owning
controller
P
Parity disk
PEM/fan module
Physical path
Port module
Power failure
protection
Primary Storage
Controller
Primary/
Secondary
switchover
Prior controller
R
RAID level
Reconstruct
Reconstruct hot-
spare disk
B-8
The measure of installing addition protection devices in case that the
overloaded main power lines cause damage to the protector as result of
overheat.
For a LUN, the user configures the owing controller, that is, specified
the created LUN to a certain controller. When the owning controller of
the LUN is invalid, another controller manages the LUN automatically.
When the owning controller of the LUN is restored, the original
controller manages the LUN again.
The disk for saving check data in RAID groups.
The PEM/fan module consists of power supply, fans, power switches,
and power sockets.
The actual path from the HBA card of the application server to the front-
end host port of storage arrays. Regardless of switches on the path, the
physical path is only decided by the corresponding relation between the
host HBA card and the array port.
Port module connects various types of front-end host port, 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 lost.
The controller which plays a leading role in controlling the management
is primary storage controller. It can perform relevant management
operations on the controller subrack.
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 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.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
OceanStor S2600 Storage System
Command Reference
Issue 07 (2010-05-20)