Netgear RD5200 (ReadyDATA 5200) – ReadyDATA 5200 System Empty Chassis with 10G (2 port SFP+ card) Softwarehandbuch
Manage Disks and Volumes
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ReadyDATA OS 1.4
Select the RAID level based on the number of disks and protection level that you want to use
for the volume:
for the volume:
Table 1. RAID level and required number of disks
RAID Level
Number of Required Disks
Redundancy
RAID 0
1 or more
None
RAID 1
2 only (more disks are not supported in RAID 1) Supported
RAID 5
3 or more
Supported for one disk
RAID 6
4 or more
Supported for two disks
RAID 10
4 or more, but an even number
Supported for all disks
RAID 50
6 or more, but an even number
Supported for one disk
per RAID 5 set
per RAID 5 set
RAID 60
8 or more, but an even number
Supported for two disks
per RAID 6 set
per RAID 6 set
Note:
Although a RAID system can be used to back up data from other
disks or another array, RAID is not meant to be an alternative or
substitute for backing up data. Data might become damaged or
destroyed without harm to the disk or disks on which it is stored. For
example, part of the data might be overwritten by a system
malfunction; a file might be damaged or deleted by user error or
malice, and not noticed for days or weeks; and the entire array is at
risk of physical damage.
substitute for backing up data. Data might become damaged or
destroyed without harm to the disk or disks on which it is stored. For
example, part of the data might be overwritten by a system
malfunction; a file might be damaged or deleted by user error or
malice, and not noticed for days or weeks; and the entire array is at
risk of physical damage.
Volumes: Overview
In the most general sense, volumes are data storage devices. Volumes can be either
physical or logical. In this manual, the term volume refers to a logical volume with a RAID set,
and the terms hard disk drive, disk, and physical volume refer to a physical storage device.
physical or logical. In this manual, the term volume refers to a logical volume with a RAID set,
and the terms hard disk drive, disk, and physical volume refer to a physical storage device.
The ReadyDATA treats disks and volumes in the following ways:
•
Each logical volume can correspond to one disk.
•
A logical volume can be made up of more than one disk.
•
You cannot divide a single disk among two or more volumes.
•
Although you can install different types of disks within the ReadyDATA, you can select
only disks of the same physical performance characteristics to be members of one
volume. For example, you cannot mix nearline SATA 7,200 rpm disks with SAS 15,000
rpm disks within one volume.
volume. For example, you cannot mix nearline SATA 7,200 rpm disks with SAS 15,000
rpm disks within one volume.
26), you
can make the following changes to the volume: