Huawei OceanStor S2600 Command Reference Manual page 263

OceanStor S2600 Storage System
Command Reference
Controller
subrack
Conversion board A circuit board in the OceanStor storage system for the conversion of
Cookie
Copyback
Create RAID
group
Cyclic
redundancy check
D
Data disk
Defragment
Degraded RAID
group
Delete RAID
group
DIP switch board
Dirty page
Disk array
Disk location
Disk subrack
Disk utilization
Dynamic LUN
Issue 07 (2010-05-20)
It is the core component of the OceanStor storage system, and is mainly
responsible for the storage service. A controller subrack consists of the
controller, hard disk, interface card, power entry module (PEM)/fan
module, battery, and dual in-line package (DIP) switch board.
disks ports.
A technology that allows a Web site server to store a bit of data in the
disk or memory of a client or read data from the disk of a client.
The process of copying the data from the hot-spare disk back to the
previous disk when the faulty member disk is restored or replaced by a
new one.
To organize free disks into a RAID group with a certain RAID level.
CRC consists of a great number of bits computed as the data to be
protected and append 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 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.
It is used to adjust the FC cascading rate and FC disk rate, and can mute
the alarm buzzer.
The data that is stored in only the cache but not written into disks.
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 subrack 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 subracks.
The percentage of used capacity in the total available capacity.
During the operations of defragment, expanding the member disk of
RAID group, modifying the stripe unit size and transferring the level of
RAID group dynamically, create a temporary LUN that can help data
transfer.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
B Glossary
B-3