Adaptec CDP-00277-01-A - Comparing RAID Levels

Comparing RAID Levels
Use this table to select the RAID levels that are most appropriate for the logical drives on your storage
space, based on the number of available disk drives and your requirements for performance and reliability.
Minimum
Disk Drives
Built-in Hot
Spare
Write
Performance
Read
Performance
Disk Drive
Usage
RedundancyRAID Level
2No******100%NoRAID 0
2No****50%YesRAID 1
3No****50%YesRAID 1E
4No****50%YesRAID 10
3No****67 – 94%YesRAID 5
6No****67 – 94%YesRAID 50
4No***50 – 88%YesRAID 6
8No***50 – 88%YesRAID 60
Disk drive usage, read performance, and write performance depend on the number of drives in the
logical drive. In general, the more drives, the better the performance.
70Proprietary and Condential to PMC-Sierra, Inc.
Document No.: CDP-00277-01-A Rev. A, Issue:
Serial Attached SCSI RAID Controllers Installation and User's Guide