[ubuntu] [12.04.1 - raid - lvm] Freeze during boot

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http://ubuntuforums.org – Hi :) I am using Zentyal v3 which uses Ubuntu 12.04.1. I've already posted on the Zentyal forums [1], but I think its a Ubuntu issue, so I try to get a hint on these site :) I have an existing lvm and raid configuration from the previous Zentyal version (Ubuntu 10.04). After starting the 12.04 installer (no upgrade) - the partitioner has detected the raid and my lvm config (with curious names, like md125, md126 and md 127). The installation was successfully, I've formatted all partitions except the /home partition. Deatiled config: 4 x 2TB drives 2 x Raid 1 (/boot and swap) 1 x Raid 5 (L (Hardware)