Ok, I decided to download and try ROCK Linux (good reviews on their site..but, that's THEIR site). Anyway, I realize that

/dev/hda = /dev/ide/host0/bus0/target0/lun0/partx

That KINDA makes sense. My questions are:

A.) What is host0? Since bus0 is Primary, and bus1 is Secondary, that comprises both IDE connectors. So, it host0 the entire IDE system? As in, if I had 2 PCI-ATA100 Controller cards, one would be host0, and one would be host1? Is that how it works? If so, I don't really get why i have host0 (2 built in IDE) and host2 (I presume my RAID controller, but why not host1)?

B.) lun0? What the hell is that? Part makes sense. It's the partitions. That obvious. But, I would think that once you got to /bus0/target0, the computer would know enough to access the partitions. What is lun0?

Well it's divided into four sections: controller, bus, target and unit.

For scsi drives that would be:
controller = host adapter
bus = scsi channel
target = scsi id
unit = logical unit number

For ide drives that would be:
bus = primary/secondary
target = master/slave

Originally the naming scheme is for scsi drives but because they didn't want to make a difference they made the ide kind of fit onto the same numbering scheme. The lun0 which would be the unit number is not used for ide drives so it would always be zero.
I'm not really sure why it would be host2 for your raid controller. But I assume host1 is probably reserved for something else already which you just aren't using. So it gets assigned host2 instead.

Hope that helps a bit.

Does anyone know why my RAID controller got host2 instead of host1?

Are you maybe using ide-scsi for any of your cdwriters or any other devices? The virtual host ide-scsi could be taking up host1 causing your controller card to pick host2.

You can change the order in which it probes scsihosts but I don't know if there is anything similar for ide controllers. Maybe this document will help you get closer to your answer
http://www.atnf.csiro.au/people/rgoo...ocs/devfs.html