Re: USB Raid array
Someone did this using USB floppies. Just because he could.
Further reading: https://arstechnica.com/civis/viewtopic.php?t=77186
The one asking that question there mentions SATA, and receives a reply that SATA to USB does not exist. But SATA to IDE does, and IDE to CF converters do exist too. So, not a stick, but it's still possible to use a hardware RAID controller with solid state storage not being SSDs.