Volumes; Optional Expansion Disk Arrays And Volumes - NETGEAR ReadyDATA 5200 Software Manual

Volumes

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.
The ReadyDATA 5200 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 5200, 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 the following
disks within one volume:
- SAS 7,200 rpm disks
- SAS 10,000 rpm disks
- SAS 15,000 rpm disks
- SSDs
After you create a volume (see
can make the following changes to the volume:
• Expand the volume by adding more disks (see
• Attach write cache and read cache SSD disks to boost the performance of volumes that
contain slower disks such as SATA 7,200 rpm or nearline SAS 7,200 rpm disks (see
Configure Write and Read Boost Disks to Improve Performance
• Export the volume (see
• Delete the volume (see
You can configure any disk that is not allocated to a volume as a hot spare for any volume in
case of failure (see Configure Global Spare Disks
provides only a temporary solution, it can be of any physical performance characteristics, that
is, it does not need to match the physical performance characteristics of the disks in the
volumes.

Optional Expansion Disk Arrays and Volumes

You can create a volume that spans more than one enclosure by using one or more optional
expansion disk arrays (EDA2000 and EDA4000).
The number of volumes that you can create within a ReadyDATA 5200 is limited only by the
total number of disks in the ReadyDATA 5200 and expansion disk arrays. With several
expansion disk arrays, the ReadyDATA 5200 supports up to 60 disks and volumes.
ReadyDATA OS 1.2
Create a Volume and Select the RAID Level
Export and Import a Volume
Delete a Volume on page 36)
Manage Disks and Volumes
19
Expand a Volume on page 29)
on page 32)
on page 34)
on page 38). Because the hot spare
on page 23), you