-
Mirroring
- Saving the same information on multiple disks
- Provides Resiliency (Fault Tolerance)
-
Striping
- Saving one file concurrently on multiple disks
- Increases Write Speed
-
Parity
- Checking a single bit for a state change
- Provides Data Integrity
-
RAID Levels:
-
RAID 0: Disk Striping:
- Faster SAVE SPEED
- Minimum # of Drives: 2
-
RAID 1: Disk Mirroring
- Better FAULT TOLERANCE
-
Minimum # of Drives: 2
- RAID 2, 3, 4: Unimportant
-
RAID 5: Striping w/ Parity
-
Faster SAVE SPEED
- Provides DATA INTEGRITY
- Minimum # of Drives: 3
-
RAID 6: Striping w/ Two Parity Checks
-
Faster SAVE SPEED
- Provides DATA INTEGRITY (x2)
- Minimum # of Drives: 4
-
RAID 10: Striping w Mirroring
-
Technically RAID 1+0 (Might not be on test)
- Faster SAVE SPEED
- Provides FAULT TOLERANCE
- Minimum # of Drives: 4