ZyXEL Communications Network Storage Appliance NSA-220 - Manual (Page 9)

ENGLISH
9
If you want to delete an existing volume, see the Storage Screens chapter in the User’s
Guide.
1
Creating a volume formats the hard drives. All data will be lost.
3 If you have two hard disks installed, select a disk configuration.
• RAID 0 (not recommended)
Has the highest write speeds but if one disk fails, you lose all the data on both
disks. Only use RAID 0 for non-critical data requiring high write speeds (like video,
graphics, and games). Total data storage space is limited to twice the capacity of
the smallest disk.
• RAID 1 (recommended)
Mirrors one disk’s data on the second disk for data security. RAID 1 is slower than
RAID 0, but you can recover all of your data if a disk fails. Total data storage space
is limited to the capacity of the smallest disk.
• JBOD (maximum data storage space)
Uses the whole storage capacity of each disk, even if there are two hard disks with
different storage capacities. With two hard disks, you can create two volumes (one
for each disk) so a failure of one hard disk should not affect the other. With two hard
disks in a single JBOD volume, you lose all the data on both disks if one disk fails.