I have Ubuntu installed on an external drive and Windows installed on my primary "C:" drive. I've been dual-booting this way for years.
Recently, I upgraded my single SSD C: drive (where Windows resides) by adding a second SSD in Raid-0. Now, my existing install of Ubuntu no longer detects my C: drive.
Does Ubuntu not natively detect Raid drives or do I simply need to reinstall Ubuntu?
Must Ubuntu also be on the Raid to detect it?
First: Upgrade. 13.04 is out of support. Upgrade to 14.04 and you won't have to upgrade again until 2019 if you don't want to.
Secondly, you haven't said what sort of RAID this is.
FakeRAID (most onboard motherboard RAID controllers) can be detected by dmraid but this needs installing. This is documented and we have older questions about it too.
Windows software raid is something else completely. My Google Fu is lacking this morning but everything I find suggests it can't be read from Linux.
Real RAID controllers usually work but sometimes need drivers installed. This really depends on the controller.
Usually this is not the case as I have 2 servers and I installed Ubuntu on them, one of them asked during installation if I wanted to activate the RAID drivers, so I'm pretty sure your RAID will be recognized.
