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From: roger@cs.wisc.edu
To: gentoo-user@lists.gentoo.org
Subject: [gentoo-user] Can't boot upgraded kerne;
Date: Tue, 13 Mar 2012 00:36:38 -0500	[thread overview]
Message-ID: <644f4d2ab46975e3c10fcfb472f2b4d0.squirrel@webmail.cs.wisc.edu> (raw)

I recently decided to update my AMD64 box from 2.38 to the new 3.2 kernel.
I used genkernel all to compile the upgraded kernel but when I go to boot
I get the following error.

>>Loading modules
>>Determining root device
!!Block device /dev/sdb2 is not a valid root device
!!Could not find the root block device in .
Pleas specify another value or" press enter for the same, type "shell" for
a shell, or "q"to skip..
root block device()::

However at this point the computer is hung and I am no longer able to
input anything. I just switched over to gentoo from bsd a year or so ago
and am still a newbie at some of the installation procedures but I believe
I have followed the manual correctly with the only change being that /boot
is located on the root partition and not a seperate partition. I'm still
able to use my older kernel without a problem and the only difference that
I can note between the two is that older kernel seems to load in a bunch
of modules and starts mdev, I believe, before trying to locate root. I am
also using Lilo since my motherboard doesn't seem to like grub. Any help I
could get would be appreciated.

roger

Here is a print out of lilo.conf
boot=/dev/sdb
map=/boot/map

prompt
timeout=50
default=Windows

image=/boot/kernel-genkernel-x86_64-2.6.38-gentoo-r6
  label=2.6.38
  read-only
  append="real_root=/dev/sdb2"
  vga=773
  initrd=/boot/initramfs-genkernel-x86_64-2.6.38-gentoo-r6

image=/boot/kernel-genkernel-x86_64-3.2.1-gentoo-r2
  label=3.2.1
  read-only
  append="real_root=/dev/sdb2"
  initrd=/boot/initramfs-genkernel-x86_64-3.2.1-gentoo-r2


other=/dev/sda1
  label=Windows


Here is a print out of fdisk
Disk /dev/sdb: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x37cd3650

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1            2048    12584959     6291456   82  Linux swap / Solaris
/dev/sdb2   *    12584960    14682111     1048576   83  Linux
/dev/sdb3        14682112   156301487    70809688    5  Extended
/dev/sdb5        14684160    18878463     2097152   83  Linux
/dev/sdb6        18880512    23074815     2097152   83  Linux
/dev/sdb7        23076864    65019903    20971520   83  Linux
/dev/sdb8        65021952   156301487    45639768   83  Linux

Here is a print out of fstab
# /etc/fstab: static file system information.
#
# noatime turns off atimes for increased performance (atimes normally aren't
# needed); notail increases performance of ReiserFS (at the expense of
storage
# efficiency).  It's safe to drop the noatime options if you want and to
# switch between notail / tail freely.
#
# The root filesystem should have a pass number of either 0 or 1.
# All other filesystems should have a pass number of 0 or greater than 1.
#
# See the manpage fstab(5) for more information.
#

# <fs>                        <mountpoint>        <type>               
<opts>                <dump/pass>

# NOTE: If your BOOT partition is ReiserFS, add the notail option to opts.
/dev/sdb2                /                ext3                noatime     
                  0 1
/dev/sdb1                none                swap                sw       
                0 0

/dev/sdb5                /var                ext3                defaults 
               1 2
/dev/sdb6                /tmp                ext3                defaults 
              1 2
/dev/sdb7                /usr                ext3                defaults 
              1 2
/dev/sdb8                /home                ext3                defaults
               1 2

/dev/cdrom                /mnt/cdrom        auto                noauto,ro 
              0 0

/dev/sda2                /mnt/Windows        ntfs                defaults 
              1 2

proc                         /proc                proc               
defaults                0 0
shm                        /dev/shm        tmpfs               
nodev,nouisd,noexec        0 0

#tmpfs                         /var/tmp/portage        tmpfs       
size=500M,mode=0777        0 0







             reply	other threads:[~2012-03-13  5:37 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-03-13  5:36 roger [this message]
2012-03-13  7:10 ` [gentoo-user] Can't boot upgraded kerne; Mick
2012-03-13 12:52   ` Bruce Hill, Jr.
2012-03-13 13:26 ` Bruce Hill, Jr.

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