Pseudo devices
The pseudo devices used by users after the multi-path management
software shields local devices.
R
RAID level
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.
Reconstruct
To restore the data in a member disk, when the member disk in a RAID
group is faulty.
Reconstruct hot-
spare disk
To restore the data from the faulty member disk in a RAID group to the
spare disk.
Reconstruct
member 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.
Reconstruction
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
Redhat package manager widely applied in Linux.
Redundancy
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.
Redundant Array
of Independent
Disks
A family of techniques for managing multiple disks to deliver desirable
cost, data availability, and performance characteristics to host
environments.
Redundant copy
When the system monitors that a member disk in the RAID groups is
about to fail, the system copies the data in the disk to a hot-spare disk.
This technology is called redundant copy.
Repair
inconsistent stripe
To correct the invalid protection of the check data block in a redundancy
group stripe for the protected space in the stripe.
S
Script
A collection of data statements used to perform an operation.
Secondary
Storage
Controller
In relation to the primary storage controller, the secondary storage
controller is the backup for the primary storage controller. When the
primary storage controller fails, the secondary controller can be replaced
to be the primary storage controller and performs management
operations on the controller subrack.
Serial port
An input/output location (channel) that sends and receives data to and
from a computer's CPU or a communications device one bit at a time.
Serial ports are used for serial data communication and as interfaces
with some peripheral devices, such as mouse and printers.
B Glossary
OceanStor S5600 Storage System
Initial Configuration Guide
B-10
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 02 (2009-09-30)
