Huawei OceanStor N8500 T Series Installation Manual page 364

OceanStor N8500 Clustered NAS Storage System
Installation Guide (for T Series V100R005)
Cyclic
redundancy check
D
Data disk
Defragment
Degraded RAID
group
Delete RAID
group
Dirty page
Disaster recovery
Disk array
Disk location
Disk enclosure
Disk utilization
Dynamic Storage
Tiering
Dynamic RAID
group expansion
E
Expand the
member disk of
RAID group
dynamically
Expander module
Issue 02 (2015-09-22)
CRC consists of a great number of bits computed as the data to be
protected and appended to the data.
The disk for saving service data in RAID groups.
The process of rewriting LUN data on disks, which helps to continue
the unoccupied free space among LUNs.
When a member disk in a RAID group fails, part or all of the redundancy
is lost.
To delete a RAID group so that member disk in a RAID group becomes
a free disk.
The data that is stored in only the cache but not written into disks.
A system deployment solution aiming at reducing loss in disasters. A
set of disaster recovery system that is the same as the production system
is deployed as a backup to store the production data when a fault occurs
in the production system. The applications are switched over to the
disaster recovery system before the production system recovers. After
the production system recovers, the applications are switched back to
the production system.
A set of disks from one or more commonly accessible disk subsystem,
combined with a body of control software. The control software presents
the disks' storage capacity to hosts as one or more virtual disks.
Locate a hard disk, that is, determine the enclosure number and slot
number of the hard disk in the OceanStor storage system.
It consists of the following parts: expander board, hard disk, PEM/fan
module, and DIP switch board. System capacity can be expanded by
cascading multiple disk enclosures.
The percentage of used capacity in the total available capacity.
A data moving and saving method, which permits system move files
between different tiers according to the access temperature.
A feature of adding member disks in a RAID group dynamically without
interrupting the normal services of the RAID group.
To add member disks in a RAID group without interrupting the normal
services of the RAID group.
A component used for expanding.
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