I have raid on my main computer which is where I either convert or download flac files. Raid it built into the motherboard. It's a Dell box but I wouldn't buy Dell again. They have cut so many corners that everything is cheap (low quality). I would build one.
I built a music server for my Slim Device. I debated long and hard about making it Raid. Since it's running all the time I wanted to save as much power as possible and built this except I used a KPC48 with dual-core. I used a 1 TB WD green drive. The whole thing is supposed to only pull about 40 watts at maximum load. There's a free program called syncback that lets you configure backups however you'd like. It works very well. So in essense I'm mirroring my raid drive on the server in the closet. I decided it was unlikely for all three drives to fail. I'm finding this works very well. I have three computers that are networked with the server. All computers except one are using XP and the other is using Vista. I'm pretty happy with this setup and don't have to worry whether it backed up or not. I access the servier with remote desktop from any of my office computers. Once you set it up it doesn't even ask for your password if you set it up that way.
I know you asked for mac but this is another way of doing it in case anyone is interested.
I built a music server for my Slim Device. I debated long and hard about making it Raid. Since it's running all the time I wanted to save as much power as possible and built this except I used a KPC48 with dual-core. I used a 1 TB WD green drive. The whole thing is supposed to only pull about 40 watts at maximum load. There's a free program called syncback that lets you configure backups however you'd like. It works very well. So in essense I'm mirroring my raid drive on the server in the closet. I decided it was unlikely for all three drives to fail. I'm finding this works very well. I have three computers that are networked with the server. All computers except one are using XP and the other is using Vista. I'm pretty happy with this setup and don't have to worry whether it backed up or not. I access the servier with remote desktop from any of my office computers. Once you set it up it doesn't even ask for your password if you set it up that way.
I know you asked for mac but this is another way of doing it in case anyone is interested.