The Storage Screen; Disk Replacement Restrictions - ZyXEL Communications NSA-220 Plus User Manual

Chapter 5 Storage

5.2 The Storage Screen

The Storage screen allows you to create and edit volumes in the NSA.

5.2.1 Disk Replacement Restrictions

See the Quick Start Guide for information on replacing disks in the NSA. When
replacing a disk in a degraded or down RAID volume, the new disk must be at
least the same size or bigger than the other disks that are already in the RAID
volume, so as all data in the volume can be restored.
For example, if you have RAID with 250 GB disks, you must put in a 250 GB or
bigger disk as a replacement in order to restore all original data in that volume. If
you put a bigger disk, the extra space on the disk will not be used.
Note: The NSA automatically repairs a degraded RAID if you insert an empty disk
without an existing file system. Otherwise, when you replace a disk you must go
to the Storage > Internal Volume > RAID screen, select the degraded array,
and click Repair.
Resynchronizing or Recovering a RAID 1 Volume
Resynchronizing or recovering a RAID 1 volume that was down is done block-by-
block, so the time it takes depends more on the size of your hard drive(s) than the
amount of data you have on them.
Note: Do not restart the NSA while the NSA is resynchronizing or recovering a volume
as this will cause the synchronization to begin again after the NSA fully reboots.
Note: You can access data on a RAID volume while it is resychronizing or recovering,
but it is not recommended.
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NSA-220 Plus User's Guide