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Thread: Cannot switch root partitions

  1. #1
    Junior Member
    Join Date
    Nov 2003
    Posts
    3

    Cannot switch root partitions

    Hi all,
    this is surely a LILO problem, but I cannot figure out myself, what the
    heck I am doing wrong.

    I have installed the CD to /dev/hda10, a reasonably big partition.
    Now there are several smaller partitions like>
    / ==> /dev/hda5
    /usr ==> /dev/hda6
    /var ==> /dev/hda8
    /home ==> /dev/hda9 ...
    which I want to use.
    I have copied the files with cp -ax to their respective target partitions
    and I think this should be allright.
    Running lilo doesnt show any mistakes to me, so I am really struggling
    why it always boots with /dev/hda10 as root device,despite the lilo.conf.hda5 that I have edited:
    Important parts of lilo.conf.hda5:
    ---snip---
    boot=/dev/hda
    root=/dev/hda5
    install=/mnt/hda5/boot/boot-menu.b
    map=/mnt/hda5/boot/map
    default=Linux-hda5

    image=/mnt/hda5/boot/vmlinuz-2.4.22-xfs
    label=Linux-hda5
    initrd=/mnt/hda5/boot/initrd.gz
    read-only
    root=/dev/hda5

    image=/boot/vmlinuz-2.4.22-xfs
    label=Linux
    initrd=/boot/initrd.gz
    read-only
    root=/dev/hda10
    ---snap---

    lilo -C /mnt/hda5/etc/lilo.conf.hda5
    produces the following output:
    ---snip---
    ...
    Added Linux-hda5 *
    <dev=0xe0,hd=20,cyl=66,sct=197>
    "ro root=305 hda=scsi hdb=scsi hdc=scsi hdd=scsi hde=scsi hdf=scsi hdg=scsi hdh=scsi apm=power-off nomce"
    ...
    Added Linux
    Device 0x030a: BIOS drive 0x80, 255 heads, 4864 cylinders,
    63 sectors. Partition offset: 55135143 sectors.
    ---snap---

    After reboot, it will always boot into /dev/hda10.
    What is wrong?
    Tnx Thomas

  2. #2
    Senior Member registered user
    Join Date
    Mar 2003
    Location
    colorado springs, colorado
    Posts
    1,933

    Re: Cannot switch root partitions

    Bad:

    image=/mnt/hda5/boot/vmlinuz-2.4.22-xfs

    Good:

    image=/hda5/boot/vmlinuz-2.4.22-xfs

    Get rid of all those entries that start w/ /mnt.

  3. #3
    Junior Member
    Join Date
    Nov 2003
    Posts
    3

    Re: Cannot switch root partitions

    Quote Originally Posted by rickenbacherus
    Bad:

    image=/mnt/hda5/boot/vmlinuz-2.4.22-xfs

    Good:

    image=/hda5/boot/vmlinuz-2.4.22-xfs

    Get rid of all those entries that start w/ /mnt.
    But /hda5 does not exist.
    If I specify an image, ..., it should exist when lilo runs.

    This does not make sense to me.

  4. #4
    Junior Member
    Join Date
    Nov 2003
    Posts
    3
    I get the impression it is the initrd which is voiding my attempts
    to use a different root partition.
    http://www.knoppix.net/forum/viewtopic.php?t=3053#14435

    in the linuxrc script in the initrd image mount /dev/hda6 is HARDCODED
    So I would need to change that in linuxrc.
    Any ideas how to do that?

    Thomas

  5. #5
    Senior Member registered user
    Join Date
    Jan 2003
    Location
    Podunk, Idaho, USA
    Posts
    470
    image=/mnt/hda5/boot/vmlinuz-2.4.22-xfs
    initrd=/mnt/hda5/boot/initrd.gz
    the image and initrd references should be relative to your root definition so:

    image=/boot/vmlinuz-2.4.22-xfs
    and
    initrd=/boot/initrd.gz
    should work,

    if not you should use the devices not the mount points like this:

    image=/dev/hda5/boot/vmlinuz-2.4.22-xfs
    and
    initrd=/dev/hda5/boot/initrd.gz

    ~rock

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