Tech Support > Operating Systems > Linux / Variants > Root Block device unspecified or not detected
Root Block device unspecified or not detected
Posted by Jochen Weiss on January 24th, 2004


Hi,

I've tried to installe Gentoo 1.4. as described in in the Gentoo
documentation. The only thing that I did not like say say in the docu: I
have no extra boot partition.

When I start booting, I get the message "Root Block device unspecified or
not detected"

this is my /etc/fstab (of my Gentoo installation)

# /etc/fstab: static file system information.
# $Header: /home/cvsroot/gentoo-src/rc-scripts/etc/fstab,v 1.13 2003/07/17
19:55:18 azarah Exp $
#
# 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*option s*if*you*want*and*to
# switch between notail and tail freely.

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

# NOTE: If your BOOT partition is ReiserFS, add the notail option to opts.
#/dev/BOOT**************
boot***********ext2************noauto,noatime***** *****1*1
/dev
hdc6***************/***************reiserFS********default************ *****1*1
/dev
hda2***************none************swap*********** *sw**********************0*0
/dev/cdrom/cdrom********/mnt
cdrom******iso9660*********noauto,ro************** *0*0

# NOTE: The next line is critical for boot!
none********************
proc***********proc************defaults*********** *****0*0

# glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
# POSIX shared memory (shm_open, shm_unlink).
# (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
#**use*almost*no*memory*if*not*populated*with*file s)
# Adding the following line to /etc/fstab should take care of this:

none********************/dev
shm********tmpfs***********defaults*************** *0*0

and this is my Grub config:

gfxmenu (hd0,2)/boot/message
color white/blue black/light-gray
default 0
timeout 8

###Don't change this comment - YaST2 identifier: Original name: SuSE###
title SuSE
****kernel*(hd0,2)/boot/vmlinuz*root=/dev/hda3*vga=791*hdd=ide-scsi
****initrd*(hd0,2)/boot/initrd

###Don't change this comment - YaST2 identifier: Original name: windows 1###
title windows 1
****root*(hd0,0)
****makeactive
****chainloader*+1

###Don't change this comment - YaST2 identifier: Original name: windows 2###
title windows 2
****root*(hd1,0)
****makeactive
****chainloader*+1

###Don't change this comment - YaST2 identifier: Original name: failsafe###
title failsafe
****kernel*(hd0,2)/boot/vmlinuz*root=/dev/hda3*ide=nodma*apm=off*acpi=off
vga=normal nosmp maxcpus=0 disableapic 3
****initrd*(hd0,2)/boot/initrd

###Don't change this comment - YaST2 identifier: Original name: Gentoo###
title Gentoo
****root(hd1,5)
****kernel*(hd1,5)/boot/kernel-2.4.24*root=/dev/hdc6*vga=791
****initrd*(hd1,5)/boot/initrd-2.4.24


Can anybody help ?