Question : RAID Controller policy on Dell 2950-III PERC 6/i

Hi All,

Im currently in the process of rebuilding my Dell 2950-III server which has got these specs:

1x Quadcore Xeon 5420 @ 2.33 GHz
5x 400 GB SAS 10k rpm HDD
RAID connector 0: 4 HDD
RAID connector 1: 1 HDD
Dell PERC 6/I RAID Controllers
16 GB RAM

While inside the Dell RAID configuration utility apps, I saw the following configuration:
Stripe Element Size: 64k
Read Policy: No Read Ahead*
Write Policy: Write Back
Disk Cache Policy: Disabled

"      From: http://g4u0420c.houston.hp.com/en/B7961-90025/ch12s02.html  You cannot set the read policy on a RAID-5 data plex. RAID-5 plexes have their own read policy (RAID).

As Im about to use this server as the RAID-5 for Exchange Server 2007, is there anything that I could tune for the best performance?
Thanks,

Answer : RAID Controller policy on Dell 2950-III PERC 6/i

Assuming you have servers on ups and configured to properly shutdown on a power loss, I would think:

Read policy = adaptive read ahead, Write Policy = Write Back, and Disk Cache = Enabled