[all variants] Ubunutu Server 12.04 stucks on boot with lvm on root

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http://ubuntuforums.org – Hi there, on boot I can see the error message on 12.04 64bit, with drops into initramfs shell. Code: ALERT! /dev/mapper/server-root does not exist. Dropping to a shell If I do a restart here, the system boots as expected. dmesg shows me then on the booted server: Code: .. [    1.052576] EXT4-fs (dm-1): INFO: recovery required on readonly filesystem [    1.053052] EXT4-fs (dm-1): write access will be enabled during recovery [    1.124048] Refined TSC clocksource calibration: 2533.331 MHz. [    2.074898] EXT4-fs (dm-1): recovery com (Hardware)