Daniel Guillermo Bareiro wrote: > Hi all! > > Currently I have an old machine without hardware virtualization > support, which I was using for testing using Jessie i686 and LXC. > > I tried to migrate that installation to amd64 architecture but > things did not went as well as I would have liked and I had to > reinstalling the operating system using on this time an amd64 > netinstall CD. > > The idea was to re-install without losing the containers I had > created. After finishing the installation process, GRUB failed > to boot with this message: > > ------------------------------------------------------------------------ > error: failure reading sector 0xb30 from 'fd0' > error: disk "mduuid/9c7c52338a6635c48476b6866bc3c650' not found. > Entering rescue mode... > grub rescue> > ------------------------------------------------------------------------ > > This makes me think GRUB is not finding the /boot directory. To > verify the ID for each block device, I've booted using SystemRescueCD: > > ------------------------------------------------------------------------ > root@sysresccd /root % blkid > /dev/loop0: TYPE="squashfs" > /dev/sr0: UUID="2015-03-28-11-54-44-00" LABEL="sysrcd-4.5.2" > TYPE="iso9660" /dev/sda1: UUID="36f333b2-e97c-34c7-69b3-4d7d79d4ef36" > UUID_SUB="0a564f8c-ffee-ac2d-811c-498401bb8a77" LABEL="sirius:3" > TYPE="linux_raid_member" PARTUUID="1d6fc95d-01" /dev/sda2: > UUID="ad9c38fd-9b82-76b8-7850-b853ef9b86dc" > UUID_SUB="a30ad913-4bec-f459-d7a4-ae18ebe759cc" LABEL="sirius:4" > TYPE="linux_raid_member" PARTUUID="1d6fc95d-02" /dev/sda4: > UUID="4d970b31-5e9f-82c0-a4f4-aadef688448c" > UUID_SUB="33983814-e607-a00f-d60f-fa6a7bc5f869" LABEL="sysresccd:2" > TYPE="linux_raid_member" PARTUUID="1d6fc95d-04" /dev/md3: > UUID="104825f4-fde8-4e7a-ada4-336990c8b28b" TYPE="swap" /dev/md4: > UUID="dbe3b076-a909-490a-a158-bfec8be698a9" TYPE="ext4" /dev/md2: > UUID="aH6UpU-85RX-0qPt-eQVO-n2Uu-9lNU-wYnGV4" TYPE="LVM2_member" > /dev/mapper/vms-gaviola--disk: UUID="aaa331dd-b687-4d10-80dc-f04b8931703c" > TYPE="reiserfs" /dev/mapper/vms-pgsql--odoo--disk: > UUID="5a2ac84f-02e1-471a-99d2-f9a67c174471" TYPE="reiserfs" > /dev/mapper/vms-odoo2--disk: UUID="c56ab66a-c24e-4580-85c6-a48c7616830d" > TYPE="reiserfs" /dev/mapper/vms-var: > UUID="07eeb0ba-01be-4d4d-b56d-12e8d407725e" TYPE="ext4" > /dev/mapper/vms-rootfs: UUID="9eaf8339-8bee-4e80-b5f6-0aa5780c9bf5" > TYPE="ext4" /dev/mapper/vms-democracyos--disk: > UUID="79796c37-5488-4cba-9447-4686570ecfbe" TYPE="ext4" > /dev/mapper/vms-democracy--disk: > UUID="ce17bc94-10fc-4ef6-be6c-df111de54d5c" TYPE="ext4" > ------------------------------------------------------------------------ > > This is the correspondence with the MD devices: > > md2 => LVM physical volume. > md3 => swap > md4 => /boot > > ------------------------------------------------------------------------ > root@sysresccd /root % cat /proc/mdstat > Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] > [raid4] [raid10] md2 : active raid1 sda4[3] > 485224512 blocks super 1.2 [2/1] [_U] > > md4 : active raid1 sda2[0] > 2045952 blocks super 1.2 [2/1] [U_] > > md3 : active raid1 sda1[0] > 979392 blocks super 1.2 [2/1] [U_] > > unused devices: <none> > ------------------------------------------------------------------------ > > Note: For now it is a single disk, but then I will add another. > > Then I mounted the file systems... > > ------------------------------------------------------------------------ > root@sysresccd /root % mount /dev/vms/rootfs /mnt > root@sysresccd /root % mount /dev/md4 /mnt/boot > root@sysresccd /root % mount /dev/vms/var /mnt/var > root@sysresccd /root % mount --bind /dev /mnt/dev > root@sysresccd /root % mount --bind /dev/pts /mnt/dev/pts > root@sysresccd /root % mount --bind /proc /mnt/proc > root@sysresccd /root % mount --bind /sys /mnt/sys > > root@sysresccd /root % chroot /mnt /bin/bash > ------------------------------------------------------------------------ > > ... to see the IDs for block devices configured in GRUB: > > ------------------------------------------------------------------------ > root@sysresccd:~# grep mduuid /boot/grub/grub.cfg > set root='mduuid/ad9c38fd9b8276b87850b853ef9b86dc' > search --no-floppy --fs-uuid --set=root > --hint='mduuid/ad9c38fd9b8276b87850b853ef9b86dc' > dbe3b076-a909-490a-a158-bfec8be698a9 > set root='mduuid/ad9c38fd9b8276b87850b853ef9b86dc' > search --no-floppy --fs-uuid --set=root > --hint='mduuid/ad9c38fd9b8276b87850b853ef9b86dc' > dbe3b076-a909-490a-a158-bfec8be698a9 > set root='mduuid/ad9c38fd9b8276b87850b853ef9b86dc' > search --no-floppy --fs-uuid --set=root > --hint='mduuid/ad9c38fd9b8276b87850b853ef9b86dc' > dbe3b076-a909-490a-a158-bfec8be698a9 > ------------------------------------------------------------------------ > > But I see no reference to the block shown in the previous > error (mduuid/9c7c52338a6635c48476b6866bc3c650). > > Any recommendations to fix this issue? > > > Thanks in advance. > > Kind regards, > Daniel
Did you check mdadm.conf - you usually regenerate it and recreate/update initrd regards
