Promise Technology EX8650, EX4650A Choosing the Physical Drives, Level, Number of Drives

Step 3: Choosing the Physical Drives

Step 3: Choosing the Physical Drives

The SuperTrak EX Controller card supports SAS and 1.5-Gb/s or 3.0-Gb/s SATA physical drives. For optimal performance, install physical drives of the same model and capacity. The drives’ matched performance allows the logical drive to function better as a single logical drive.

Level	Number of Drives	Level	Number of Drives
RAID 0	1 or more	RAID 6	4 to 16*
RAID 1	2 only	RAID 10	4 or more**
RAID 1E	3 or more	RAID 50	6 or more
RAID 5	3 to 16*	RAID 60	8 or more

*Requires SAS expansion

**Requires an even number of drives

The table above shows the number of drives required for each RAID level.

9