Table of Contents
Advertisement
Chapter 4 Storage Management
Chapter 4 Storage Management
RAID Modes
TeraStations support many types of RAID. The type of RAID arrays available for use depends on how many drives are
installed in your TeraStation.
Notes:
• If you change the RAID mode, all data on the array is deleted. This is true for every procedure in this chapter.
Always back up any important data before performing actions that affect your RAID array.
• Some RAID arrays allow you to change the RAID mode without losing data by adding drives. To change a RAID
mode by adding drives to the existing array, refer to the
below.
• Drive capacity is displayed in Settings in actual gigabytes. The Properties window in Windows may show GiB
instead, which will be a smaller number.
• If the TeraStation is restarted or shut down while changing the RAID mode, the message that appears on the LCD
panel will change from I46 or I47 to I18.
• RAID 61 and 60 are only available for TeraStations with eight drives inserted; RAID 51 and 50 are only available
for TeraStations with six or more drives inserted; RAID 5, 6, and 10 are only available for TeraStations with three or
more drives inserted. Please check Settings on your model before changing the RAID mode.
RAID 6
RAID 6 arrays are available for TeraStations with four or more drives. RAID 6 combines four or more drives into a
single array. The usable space is equal to the sum of the capacity of all drives minus the capacity of two drives. For
example, if four drives are combined into a RAID 6 array, the usable space is the sum of the capacity of two drives. If
two drives in the array become damaged, you can recover data by replacing them. If three or more drives become
damaged, then all data in the array will be lost.
RAID 61
RAID 61 arrays are available for TeraStations with eight or more drives. In this mode, two RAID 6 arrays are mirrored
in a RAID 1 array. The usable space for eight drives in a RAID 61 array is two times the capacity of the smallest drive.
RAID 60
RAID 60 arrays are available for TeraStations with eight or more drives. In this mode, two RAID 6 arrays are combined
in a RAID 0 array. The usable space for eight drives in a RAID 60 array is four times the capacity of the smallest drive.
RAID 5
RAID 5 arrays are available for TeraStations with three or more drives. RAID 5 combines three or more drives into a
single array. The usable space is equal to the sum of the capacity of the drives minus the capacity of one drive. For
example, if four drives are combined into a RAID 5 array, the usable space is the sum of three drives. If one drive in
the array becomes damaged, you can recover data by replacing the damaged drive. If two or more drives become
damaged at the same time, then all data in the array will be lost.
"Expanding RAID Capacity Without Deleting Data"
43
section
Advertisement
Table of Contents
