Promise Technology EX8650A User Manual
SuperTrak EX Series User Manual
14
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.
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.
The table above shows the number of drives required for each RAID level.
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