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Old 10th December 2010, 11:18 PM
Zerc Offline
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Join Date: Aug 2007
Posts: 3
F13 - boot problems with RAID1/LVM/dracut

I am trying to boot my F13 server that has 3 partitions (sda2,sdb2,sdc2) configured as RAID1 (md0), vg00 is on md0 and / is on vg00/lvol00 and boot is on /dev/sda1, sda3,sdb3 and sdc3 contain other non-OS data and I get the following errors
dracut scanning devices sda3,sdb3,sdc3 for LVM logical volumes vg00/lvol00 vg00/lvol01
dracut: Volume group "vg00" not found
dracut: Skipping volume group vg00
dracut: Autoassembling MD Raid

No root device round

and then everything stops

If I go in with rdshell and type in -
mdadm --assemble /dev/md0 /dev/sda2 /dev/sdb2 /dev/sdc2
lvm vgscan (Volume group vg00 is found)
lvm vgchange -a y

then the server will boot correctly

my menu.lst file has the following in it -

title Fedora (
root (hd0,0)
kernel /vmlinuz- ro root=/dev/mapper/vg00-lvol00 rd_MD_UUID=39c23c71:01fbef35:c6968f48:26495aa5 rd_LVM_LV=vg00/lvol00 rd_LVM_LV=vg00/lvol01 rd_NO_LUKS rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rdshell
initrd /initramfs-

Can anybody assist me with getting the server to boot properly again?

---------- Post added 2010-12-11 at 12:18 AM ---------- Previous post was 2010-12-10 at 11:58 PM ----------

Ok I managed to solve it. When I originally installed F13 I had 2 partitions in md0 and later on I added /dev/sdc2 to make it a 3 partition Raid 1 array. My thinking was seeing that I had the extra space it wouldn't hurt to use it as another mirror. One month later after I booted the server I have found out it did hurt. I removed the 3rd partition and now it's fine again. I wonder though if it would be possible though to use that 3rd partition.
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Old 1st May 2011, 12:10 AM
PaulDestefano Offline
Registered User
Join Date: Oct 2010
Posts: 15
Re: F13 - boot problems with RAID1/LVM/dracut

Hey Zerc,

Just had the exact same problem. I assume you figured out the solution, too. But in case you haven't you might be interested in my thread: 262349.

I'm not even sure that 'num-devices=' is a good parameter to include in your mdadm.conf, but it just needs to be adjusted whenever you change the number of devices. Makes sense, except when you don't have reason to expect this parameter is being used. Seems like more trouble that it's worth, to me.
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