I can confirm this on 13.04. Booting an ASUS P8H77-M PRO completely broke a 1TB ONDEMAND-RAID1 array of two disks!
Even worse, the SATA was actually in AHCI mode on purpose in the BIOS! Nevertheless it activated the raid, even worse, started a sync without asking! I could barely get back the partitions with partition recovery. I had extremely hard time to recover my TrueCrypt encrypted volume! (Thanks, EASEUS!) This is severe! You can loose all your data! ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/383001 Title: booting live cd breaks intel matrix raid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/383001/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs