Selecting The Best Raid Level - Adaptec SAS/SATA/SCSI RAID Controllers Installation And User Manual

Selecting the Best RAID Level

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.
RAID Level
RAID 0
RAID 1
RAID 1E
RAID 10
RAID 5
RAID 5EE
RAID 50
RAID 6
RAID 60
1
Because they support four disk drives only, the Adaptec 2420SA RAID controller can't support RAID 50 or RAID 60
arrays.
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.
Disk Drive
Redundancy Usage Performance
No 100%
Yes 50%
Yes 50%
Yes 50%
Yes 67 – 94%
Yes 50 – 88%
1 Yes 67 – 94%
Yes 50 – 88%
1 Yes 50 – 88%
Appendix B: Understanding RAID
Read Write Built-in Hot
Performance Spare
No
No
No
No
No
Yes
No
No
No
77
Minimum
Disk Drives
2
2
3
4
3
4
6
4
8