| 0 |
Striping, where data is simply striped across
multiple disks to make one larger logical file system; no parity information
is used; one dead disk takes out the whole array |
| 1 |
Mirroring, where one disk is duplicated onto
another disk; if either disk fails, the other disk has
all the data (no data is lost) |
| 2 |
Parity (proprietary), special case. Patented by Thinking
Machines, Inc. Hamming code disk array which consists
of data drives and multiple parity drives. |
| 3 |
Striping with parity, where one disk in an n-way stripe
is reserved for parity information (also known as byte striping) |
| 4 |
Striping with parity, where one disk in an n-way stripe
is reserved for parity information, using a variable striping
unit size (also known as segment striping) |
| 5 |
Striping with parity, where information (including both data
and parity) is striped across all disks in an n-way
stripe |
| S |
Striping with parity (proprietary), where information
(including both data and parity) is striped across all disks in
an n-way stripe; proprietary to EMC Corp. (no longer
in use) |
| 6 |
Segment striping with multiple parity, an improvement
on RAID 5 by having multiple parity drives, allowing for multiple
disk failures with no data loss |
| 7 |
Striping with parity (proprietary), a method patented
by Storage Computer Corp. where data is striped across multiple
drives with one or more parity drives (an unofficial RAID level) |
R