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Titel: Cannot Start My Computer Reliably with Grub.
 Verfasst am: 27.11.2006, 14:53 Uhr
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Anmeldung: 26. Nov 2006
Beiträge: 85
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Damn... After all that effort and debate... Sigh...
Hi, I just lost my Kanotix install (2006-01-RC4) and got a Kernel panic for no good reason.
The message I get when I start is:
Code:
"Kernel Panic - not syncing: VFS: unable to mount root fs on unknown - block (0,0)"
Which is genuinely nonsensical - as there is no reason it should be looking there for my root file system - as my root file system is located at (0,1) or (hd0,1) in grub speak.
My menu.list is set out as follows:
Code:
title Debian GNU/Linux, kernel 2.6.18-kanotix-1
root (hd0,1)
kernel /boot/vmlinuz-2.6.18-kanotix-1 root=/dev/sda2 ro
title Debian GNU/Linux, kernel memtest86+
root (hd0,1)
kernel /boot/memtest86+.bin
### END DEBIAN AUTOMAGIC KERNELS LIST
title Windows 2K/XP/2003 (sda1)
chainloader (hd0,0)+
I have removed the VGA lines and I have disabled splashy - because they weren't working properly and were interfering with the boot process - and I wanted to see what was happing when I was booting up.
The question is, why is Grub looking at the wrong partition for my root file system? The partition it's looking at has Windows on it. (I plan to remove it as soon as I have a working Linux install).
Also why would it suddenly behave like this? I changed nothing, I did nothing other than reboot. It worked 20 times before that. So why quit now?
If it is any help I am using a laptop with a SATA interface. (No IDE drives).
Can anyone offer any input? |
Zuletzt bearbeitet von jebus197 am 28.11.2006, 22:31 Uhr, insgesamt 4 Male bearbeitet
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Titel: RE: Rat
Verfasst am: 27.11.2006, 15:44 Uhr
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Anmeldung: 26. Nov 2006
Beiträge: 85
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Well I reinstalled grub - and that appeared to 'fix' it - although I have no idea why Grub would behave in this way to begin with.
I'm not sure how long it will last, but hopefully it won't happen again. |
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Titel:
Verfasst am: 27.11.2006, 17:56 Uhr
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Anmeldung: 02. Nov 2005
Beiträge: 127
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| Grub labels partitions differently to the kernel, just to cause extra confusion maybe? |
_________________
Linux user 403389 and Herbaholic Trichopath
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Titel:
Verfasst am: 27.11.2006, 18:08 Uhr
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Anmeldung: 26. Nov 2006
Beiträge: 85
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| I have no idea my friend. There was no reason for it to happen. In any case I have moved Grub from my MBR to /dev/sda2 (Or (hd0,1) in grub speak) - which is my root partition and have made this partition active - so hopefully this will be more reliable. |
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Titel:
Verfasst am: 28.11.2006, 13:25 Uhr
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Anmeldung: 26. Nov 2006
Beiträge: 85
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Dammit - no... It's still occasionally refusing to start. So far if I leave it off for a few minutes and then try again, it will work - but I wonder - is there and commands I can pass on he Grub command line to make booting any more reliable?
I am using a SATA drive (and indeed my laptop ony has a SATA interface). |
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Titel:
Verfasst am: 28.11.2006, 13:52 Uhr
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Anmeldung: 22. Jan 2006
Beiträge: 1296
Wohnort: Budapest
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| If you have splashy, disable it. Either through h2's script or edit as root /etc/default/splashy and set
Code:
ENABLE=0
Helped here.
hubi |
_________________
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Titel:
Verfasst am: 28.11.2006, 15:51 Uhr
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Anmeldung: 26. Nov 2006
Beiträge: 85
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Yes I already diabled Splashy some time ago. That doesn't seem to be what is cauing it.
Splashy had it's own problems in that it would often halt the booting process 3/4 of the way through - and in order for boot to continue you had to press escape then alt+F1 to drop to a prompt. Boot would then continue normally. Spashy has always been poor and has always had bugs - so I don't know why Kano decided to include it. It's certainly not the first time I've seen it halt a booting computer - which in my view for such a simple graphical utility is simply not a good thing at all.
But this is not the same issue.
In this case Grub (and specifically grub) occasioally reports that it cannot find my root partition - and indeed sometimes it seems to even be looking on the wrong partition in that it reports trying to load my root file system from (hd0,0) instead of (hd0,1). This is clearly wrong as my Grub menu.list is set out as follows:
Code:
title Debian GNU/Linux, kernel 2.6.18-kanotix-1
root (hd0,1)
kernel /boot/vmlinuz-2.6.18-kanotix-1 root=/dev/sda2 ro
title Debian GNU/Linux, kernel memtest86+
root (hd0,1)
kernel /boot/memtest86+.
Which is correctly formatted for my appropriate root partition. |
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Titel:
Verfasst am: 28.11.2006, 19:57 Uhr
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Anmeldung: 26. Nov 2006
Beiträge: 85
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Hi, is it possible to perhaps make a CD that I can use to boot my computer properly?
I can't use a floppy drive, as my laptop does not have a floppy drive.
This is really an unusual situation for me - as normally on every other computer I have owned Grub has always been 100% stable and reliable. |
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