I just purchased an HP Proliant DL580 G2 server. I have never used RAID, but this system comes with:
Smart Array 5i Plus Controller (integrated on system board), Dual Channel, Ultra3 (supports RAID 0, 1, 1+0, and 5 across internal hard disk drives) with 64 MB of memory. 64-MB total memory for code, transfer buffers, and read/write cache on the 5i Plus Memory Module Connector for Battery Backed Write Cache (BBWC) Enabler
And the server comes with 3x36GB hot-plug SCSI drives. I want to set this server up to host a fairly simple PHP web site and accounting system I'm creating (mysql backend), basically an intranet site. It will never get anywhere close to 36 gigs, however I do need it to be VERY reliable. I plan on running Debian 5 Lenny (php/lighttpd/mysql stacj) on it. I figured if I put all three disks in a RAID-1 mirror array, it would allow for me to have two spares in case of a drive failure. It also has redundant power supplies in case of a failure on that front. Is there anything special I should know about configuring the raid this way, or should I be going for a different type of raid? Any help would be greatly appreciated. Also, any advice on redundancy in general on a server of this type would be appreciated as well.
Thank you so much.
Not looking for super-performance out of the RAID, just mostly for redundancy.