User manual

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APPENDIX
Summary of RAID Levels
The SATA RAID controller supports RAID Level 0, 1, 10(1E), 3, 5 and
6. The table below provides a summary of RAID levels.
Features and Performance
RAID
Level
Description Min.
Drives
Data
Reli-
ability
Data
Transfer
Rate
I/O Request
Rates
0 Also known as stripping
Data distributed across multiple
drives in the array. There is no
data protection.
1 No data
Protec-
tion
Very
High
Very High
for
Both Reads
and Writes
• RAID 6
RAID 6 provides the highest reliability. It is similar to RAID 5, but
it performs two different parity computations or the same compu-
tation on overlapping subsets of the data. RAID 6 can offer fault
tolerance greater than RAID 1 or RAID 5 but only consumes the
capacity of 2 disk drives for distributed parity data. RAID 6 is an
extension of RAID 5 but uses a second, independent distributed
parity scheme. Data is striped on a block level across a set of
drives, and then a second set of parity is calculated and written
across all of the drives.