ZyXEL Communications NSA-2400 Guia do Utilizador descarregar pdf (Página 81)

NSA-2400 User’s Guide

81 Chapter 6 Storage

6.3 Volumes

On an NSA, a volume is a storage area on a single disk or spread across a number of disks

within a single file system. How you spread data across disks depends on if you use a RAID

(Redundant Array of Independent Disks) method or SINGLE.

Note: All data is deleted if you re-create a volume.

You can specify volumes on the internal disks and external disks attached to the USB port(s).

• If you have four disks and are using RAID 5, then you can have one volume on the NSA

(RAID 5 uses all fours disks for data parity and striping).

• If you have four disks and are using RAID 1, then you can have two volumes (you need

to use two disks to create one RAID 1 volume on the NSA). You could also use RAID 1

on two disks and RAID 0

on the other two allowing you to have three volumes.

• Finally you could use RAID 0 or SINGLE on all four disks allowing you to have up to

four volumes.

• You can configure SINGLE or Backup on external USB disks. Choose Backup if you

intend to use the backup utility to copy data from the NSA internal drives to the external

USB drive. Before backup begins, the NSA first checks the drive for disk space and then

scans for file system errors.

Note: You can spread a volume across internal disks but not between internal and

external disks.

6.3.1 RAID

Redundant Array of Independent Disks (RAID) is a method of storing data on multiple disks

to provide a combination of greater capacity, reliability, or speed.

The RAID levels supported on the NSA are:

Status 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.

Snapshot You can see information on snapshots you created on the NSA here.

Table 27 Storage > Overview (continued)

LABEL DESCRIPTION

1. Not available at the time of writing.

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 159 160

Sem comentários

ZyXEL Communications NSA-2400 Guia do Utilizador Página 81