Volumes And Raid; Table 36 Storage > Overview - ZyXEL Communications NSA-2400 User Manual

Chapter 7 Storage Screens
The following table describes the labels in this screen.
Table 36 Storage > Overview
LABEL
Internal/External Volume
Status
Volume Name
Volume Configuration
Space Usage
Internal/External Disk
Status
Disk Name
Model Name
Volume
Volume Configuration
Capacity

7.3 Volumes and RAID

A volume is a storage area on a disk or disks. You can create volumes on the internal disks
and external disks attached to the USB port(s). You can spread a volume across internal disks
but not between internal and external disks.
RAID (Redundant Array of Independent Disks) or JBOD is the storage method that the NSA-
2400 uses. The storage method you use depends on how many disks you have and how many
volumes you want to create. It's important that you consider this carefully as all data is deleted
when you re-create a volume.
Back up your data before deleting or re-creating a volume!
For example if you originally have two disks configured at RAID 1, and you then buy two
more disks and want to configure all four at RAID 5, you should first back up all your data on
those disks (see the Genie Backup Manager utility on the included CD) and then restore your
data later after you create the new volume type.
Below is a table that summarizes some attributes of the various RAID levels as supported on
the NSA-2400. For capacity and storage efficiency, "S" is the size of the smallest drive in the
array, and "N" is the number of drives in the array.
98
DESCRIPTION
These tables display information on all internal volumes (created on NSA
internal disk drives) and external volumes (created on external disk drives
attached to the NSA USB ports). See the volume screen for field details.
This field shows whether the volume is Healthy, Resynching, Waiting
Resynch, Degraded or Down.
The NSA creates the volume name automatically.
This field shows which data storage system the volume is using.
This field shows how many bytes of space on the volume are being used.
This table displays information on all internal disk drives and external disk
drives (attached to the USB port(s)).
This field displays OK if the (physical) disk is readable and Down if no
data can be read from it. If Down, the disk may need to be scanned for
errors or replaced. If it needs to be repaired or replaced, then you will
have to resynchronize the volume.
The NSA creates the disk name automatically depending on how many
disks you installed in the NSA.
This is the hard disk number that identifies the disk.
This field shows the volume to which the disk belongs.
This field shows the volume storage system to which that disk belongs.
This field shows the size of the disk in GB.
NSA-2400 User's Guide