Hi I have a problem. I have a debian etch stable. I made this setup: 3 hd. 3 x 1 gb for /boot raid 1 (out of lvm) 3 x 15 gb for / raid 5 (lvm) 3 x 20 gb for /home raid 5 (lvm) 3 x 256 mb for swap raid 5 (lvm) I made all during the installation process. I have used lvm on raid 5 partitions. I have never used lvm before, "only" raid. The problem is that i have always recompiled kernel by vanilla sources, and i never used initrd cause the "important" things i am usual to put "built in " in the kernel configuration. This time, with lvm, it doesn't work: so: Do I have left something out of the kernel? (is dm-mod the part about lvm, right?) ? Do I need initrd the same? The error I get during boot is (after raid is corretly started): VFS: cannot open root device "mapper/name-of-the-volume" or unknown-block (0,0) Please append a correct "root=" boot option md0 (driver?)* kernel panic not syncing vfs: unable to mount root fs on unknown-block (0,0) * md0 is the raid 5 metadevice Thans in advance.