Proware Epica, User Manual

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NAS System
16 User Manual
RAID Management
The subsystem can implement several different levels of RAID technology. RAID levels
supported by the subsystem are shown below.
RAID
Level
Description
Min. Drives
Linear
Linear is similar to RAID 0 in that it combines the capacity
of all member drives. The data is written linearly starting
with the first disk drive. When first disk drive becomes
full, the next disk drive is used. There is no data
redundancy.
1
0
Block striping is provided, which yields higher
performance than with individual drives. There is no
redundancy.
2
1
Drives are paired and mirrored. All data is 100%
duplicated on an equivalent drive. Fully redundant.
2
3
Data is striped across several physical drives. Parity
protection is used for data redundancy.
3
5
Data is striped across several physical drives. Parity
protection is used for data redundancy.
3
6
Data is striped across several physical drives. Parity
protection is used for data redundancy. Requires N+2
drives to implement because of two-dimensional parity
scheme.
4
0 + 1
Combination of RAID levels 0 and 1. This level provides
striping and redundancy through mirroring.
4
30
Combination of RAID levels 0 and 3. This level is best
implemented on two RAID 3 disk arrays with data striped
across both disk arrays.
6
50
RAID 50 provides the features of both RAID 0 and RAID
5. RAID 50 includes both parity and disk striping across
multiple drives. RAID 50 is best implemented on two
RAID 5 disk arrays with data striped across both disk
arrays. 6