My first thought if using a SATA1 interface is the RAID0 would saturate the interface. I'd rather run RAID1 in that setup if redundancy is important. These days, though, unless it's a 24/7 server, I wouldn't recommend RAID at all due to complexity. Just have a solid backup plan and if anything, store the 2nd SSD as an emergency spare to restore to if need be.

Especially on a retro system, there will be bottlenecks *somewhere* that keep a RAID SSD setup from making sense. Just my opinion, though.

My thoughts are quite similar. Raid one makes sense if it's a server biuld. But a back up drive would be simpler for most.

Total waste. You are going to be limited by the pci bus. In old systems thats ~100mb/s on a good day. I have a P4 xeon server wirh pci-e and the bottleneck is the ethernet, even running 4 in parallel. The raid setup i have is capable of 1.2gb/s reads, and that is with slow 5400rpm drives.

How old are the systems you're wanting to do this with? RAID with SSDs via PCI will most likely max out the PCI bus, regardless of the SSD setup or controller card. You'll get way more performance with a PCIe controller, if the system supports PCIe.