Buffalo Tech TeraStation - Chapter 1 Changing RAID Modes; RAID Arrays

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The default RAID mode of your TeraStation is dierent for dierent models as shown below.
TeraStation Modes
TS-WVHL RAID 1
TS-QVHL
RAID 6
TS-6VHL
TS-8VHL
TS-RVHL
The characteristics of each type of RAID are described below.
• RAID 6
RAID 6 is available for TeraStation models with 4 or more hard drives. It combines 4 or more drives into a single array.
It generates parity during writes, so access speeds are slower than other RAID modes. The usable space is equal to the
sum of the capacity of the hard drives minus the capacity of two drives. If 4 hard drives are combined into a RAID 6 array,
the usable space will be the sum of 2 drives’ capacity.
If 2 hard drives in the array are damaged, you can recover data by replacing them. You cannot recover data if 3 or more
drives are damaged.
• RAID 61
RAID 61 is available for TeraStation models with 8 hard drives. RAID 61 combines 8 hard drives into a single array. In this
mode, two RAID 6 arrays are combined in a RAID 1 array. It generates parity during writes, so access speeds are slower
than other RAID modes. Identical data is written to multiple hard drives. The total usable space is equal to the capacity
of the smallest drive multiplied by the number of hard drives ÷ 2 – 2.
• RAID 60
RAID 60 is available for TeraStations with 8 hard drives. It combines 8 hard drives into a single array. In this mode, two
RAID 6 arrays are combined in a RAID 0 array. It generates parity during writes, so access speeds are slower than other
RAID modes. The total usable space is equal to the capacity of the smallest drive multiplied by (number of hard drives ÷
2 – 2) × 2.
• RAID 5
RAID 5 is available for TeraStations with 4 or more hard drives. It combines 3 or more drives into a single array. It
generates parity during writes, so access speeds are slower than other RAID modes. The usable space is equal to the
sum of the capacity of the hard drives minus the capacity of one drive. If 3 hard drives are combined into a RAID 5 array,
RAID Arrays
Chapter 1
Changing RAID Modes