Storage Technical Reference; Choosing A Storage Method For A Volume - ZyXEL Communications NSA 210 User Manual

Table 24 Storage > Volume > Create a USB Volume (continued)
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7.5 Storage Technical Reference

This section provides some background information about the topics covered in
this chapter.

7.5.1 Choosing a Storage Method for a Volume

The following is a guide to help you choose a storage method for the various
number of disks supported on the NSA. See
theoretical background on JBOD and the RAID levels used on the NSA. Typical
applications for each method are also shown there.
One Disk
If you only have one disk, you must use JBOD. All disk space is used for your data
- none is used for backup. If the disk fails, then you lose all the data on that
volume (disk). You can add another disk to your one-disk JBOD volume later
without having to re-create shares, access rights, and so on. Alternatively, you
could create a different JBOD volume if you install a second disk. (and create new
shares, access rights and so on).
Two Disks:
You may choose JBOD, PC Compatible Volume or RAID 1. With two disks you could
create:
• up to two JBOD volumes
• one PC Compatible volume + one JBOD
• one RAID 1 volume
• Choose JBOD for flexibility and maximum usage of disk space for data.
• Choose RAID 1 if data security is more important than performance. Since
RAID 1 mirrors data onto a second disk, you can recover all data even if one
disk fails.
NSA210 User's Guide
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Chapter 7 Storage
Section 7.5.2 on page 180 for
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