Tobias, Thomas, all, After update to 2.6.38-7.1 I am experiencing a dmraid failure. It also affects the LTS kernel. The Fallback image boots fine. The failure produces the following error (retyped from RAMFS console): boot messages: Activating dmraid arrays... no block devices found Waiting 10 seconds for device /dev/mapper/nvidia_baaccajap5 Root device '/dev/mapper/nvidia_baaccajap5' doesn't exist attempting to create it. Error: Unable to determine major/minor number of root device '/dev/mapper/nvidia_baaccajap5' In the past, Thomas has mentioned: <quote> This might just be a timing problem: dmraid -ay might be called before /dev/sd* is fully set up and detected - we had these problems in the past already. The 'sleep' hook put after the udev hook can work around that. </quote> I'll give the sleep hook a go and report back. I have updated 3 dmraid systems with 2.6.38-7.1 and I only have this problem on one box. (2 - x86_64, 1 - i686). Since Fallback works fine, this seems like the timing problem. If anyone else can confirm this or suggest additional tests, I'm happy to try them. -- David C. Rankin, J.D.,P.E.