Huawei OceanStor Dorado V3 Series Parts Replacement page 222

OceanStor Dorado V3 Series
Parts Replacement
Pre-copy
Primary storage controller The controller that plays a leading role in controlling
Primary/Secondary
switchover
Prior controller
R
RAID level
Reconstruction
Redundancy
Remote replication
Reverse synchronization
Route
S
Issue 05 (2019-01-30)
When the system monitors a failing member disk in a RAID
group, the system copies the data from the disk to a hot
spare disk in advance.
management. It can perform relevant management
operations on the controller enclosure.
A process for the conversion of the primary/secondary
relationship.
For the application server LUN, prior controller means the
working controller is the owner controller of the
corresponding LUN array.
The application of different redundancy types to a logical
drive. A RAID level improves the fault tolerance or
performance of the logical drive but reduces the available
capacity of the logical drive. You must specify a RAID level
for each logical drive.
The regeneration and writing onto one or more replacement
disks of all of the user data and check data from a failed disk
in a mirrored or RAID array. In most arrays, a rebuild can
occur while applications are accessing data on the array's
virtual disks.
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 operation in
the event of a component failure.
A core technology for disaster recovery and a foundation
that implements remote data synchronization and disaster
recovery. This technology remotely maintains a set of data
mirrors through the remote data connection function of the
storage devices that are separated in different places. Even
when a disaster occurs, the data backup on the remote
storage device is not affected. Remote replication can be
divided into synchronous remote replication and
asynchronous remote replication.
The process of restoring data from the redundancy machine
(RM) when the services of the production machine (PM) are
recovering.
The path that network traffic takes from its source to its
destination. On a TCP/IP network, each IP packet is routed
independently. Routes can change dynamically.
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8 Glossary
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