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Old 08-14-2005, 10:20 AM   #1
IwantLINUX
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Registered: Oct 2004
Location: India
Distribution: RH9,Fedora
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Question Grub!!!!!!!!!!!!!!!


Hi members,

I am having a problem with booting. Earlier i was having two hard disks, primary master (hda for windows) and primary slave ( hdb1 for linux native). I installed GRUB on my primary master's MBR, now my master hard disk has crashed and i made my slave disk as master and installed the GRUB on its MBR. But the problem is i cannot boot my system to linux, if i connect only my linux disk as master, i get "/ label not found" and then "kernel panic---no init found". I am getting the GRUB splash screen and choice, but it is not able to boot. If i connect another HDD as master (with grub installed on MBR) and change the linux disk to slave, it boots fine.
==========================================================
This is working grub.conf (with both the disks)

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You do not have a /boot partition. This means that
# all kernel and initrd paths are relative to /, eg.
# root (hd1,0)
# kernel /boot/vmlinuz-version ro root=/dev/hdb1
# initrd /boot/initrd-version.img
#boot=/dev/hda
default=1
timeout=10
splashimage=(hd1,0)/boot/grub/splash.xpm.gz
title Red Hat Linux (2.4.20-8)
root (hd1,0)
kernel /boot/vmlinuz-2.4.20-8 ro root=LABEL=/
initrd /boot/initrd-2.4.20-8.img
title windows
rootnoverify (hd0,0)
chainloader +1
===========================

This is non-working grub.conf (with only linux disk as master)

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You do not have a /boot partition. This means that
# all kernel and initrd paths are relative to /, eg.
# root (hd1,0)
# kernel /boot/vmlinuz-version ro root=/dev/hdb1
# initrd /boot/initrd-version.img
boot=/dev/hda
default=1
timeout=10
splashimage=(hd0,0)/boot/grub/splash.xpm.gz
title Red Hat Linux (2.4.20-8)
root (hd0,0)
kernel /boot/vmlinuz-2.4.20-8 ro root=LABEL=/
initrd /boot/initrd-2.4.20-8.img
# title windows
# rootnoverify (hd0,0)
# chainloader +1

===========================

pls help
 
Old 08-14-2005, 10:45 AM   #2
david_ross
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Registered: Mar 2003
Location: Scotland
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Try using the device name and not the partition label - ie, change:
kernel /boot/vmlinuz-2.4.20-8 ro root=LABEL=/

To:
kernel /boot/vmlinuz-2.4.20-8 ro root=/dev/hda1

Assuming hda1 is your root partition.
 
Old 08-15-2005, 12:36 PM   #3
IwantLINUX
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Registered: Oct 2004
Location: India
Distribution: RH9,Fedora
Posts: 75

Original Poster
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Hi,

i tried changing it to kernel /boot/vmlinuz-2.4.20-8 ro root=/dev/hda1
but it still gives me error:
========================================
hda1:bad access: block=2 count=2
end_request: I/O error, dev 03:01 (hda),sector 2
EXT3-fs: unable to read superblock
mount: error 22 mounting ext3
pivotroot : pivot_root(/sysroot,sysroot/initrd) failed:2
umount /initrd/proc failed:2
freeing unused kernel memory: 132k freed
kernel panic: no init found: Try passing init=option to kernel
=====================

PS: My hda in this case is my hdb (when I am able to boot, with two drives connected and using linux disk as slave)

Last edited by IwantLINUX; 08-15-2005 at 12:38 PM.
 
Old 08-15-2005, 01:16 PM   #4
Kilahchris
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Registered: Jan 2003
Location: NY
Distribution: Suse 9.0
Posts: 202

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you do need to keep /boot/vmlinuz-2.4.20-8 ro root=/dev/hda1

If linux drive is now the primary master.



Im wondering if you need to create a new Initrd
maybe because the initial initrd was a snapshot of hdb1 which is now really hda1???

wouldnt hurt to type man mkinitrd and follow the instructions on created a new ramdisk image.?

mkinitrd will copy a new ramdisk image to /boot

Last edited by Kilahchris; 08-15-2005 at 01:19 PM.
 
Old 08-19-2005, 01:25 PM   #5
IwantLINUX
Member
 
Registered: Oct 2004
Location: India
Distribution: RH9,Fedora
Posts: 75

Original Poster
Rep: Reputation: 15
Hi,

Sorry for the delay. Kilahchris, your advise really seems to be right to the point, but i am still lost...Actually i am only able to boot, if i connect another disk as master. In this case, if i run mkinitrd it will still make my linux disk as slave. I tried using CD rescue mode, with linux disk as master, but it fails with error "Error mounting / file system on /dev/hda1" Invalid argument. Also, i i create a bootable disk, then also it will copy the same initrd.img, with my linux disk as slave. Pls let me know.
 
  


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