Stephane,

> i not understand, it's write that raid 10 is recommended ! ??

The RAID levels and their relative performance trade-offs can be seen on the following link:

http://pcguide.com/ref/hdd/perf/raid/levels/comp-c.html

For a production server, RAID 0 is NEVER EVER EVER recommended. It had no fault tolerance; if 1 drive fails, you lose all your data!

Depending on read/write ratio of your application (if many more reads than writes), and the quality of your RAID controller RAID 5 does not perform as badly as the chart suggests (I would expect that the chart assumes only a basic RAID controllers with no BBU cache).


RAID 5 gives you the most available storage

RAID 1/10 gives you that fastest random write performance.


Sean