grub.conf [solved]

Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

Alright, I resized the ntfs partition and installed gentoo along side windows on my laptop, and I'm having trouble with grub.

John R. Graham · Posted: Sun Aug 26, 2007 10:59 pm Post subject:

Well, is your drive IDE or SATA? You've use both /dev/sda4 and /dev/hda4 in your post. Unconfuse me, please.

- John

Telexen · Apprentice Joined: 09 Oct 2005 Posts: 189

It means the kernel wasn't found

perhaps you mean, kernel-2.6.21-gentoo-r6 rather than kernel-2.6.12-gentoo-r6

Plus you mention both hda4 and sda4

Voltago · Posted: Sun Aug 26, 2007 11:03 pm Post subject:

Take care you use the line

JC99 · l33t Joined: 06 Aug 2003 Posts: 719 Location: Toronto

Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

Sory. It's:

root (hd0,3)
kernel /boot/kernel-2.6.12-gentoo-r6root=/dev/sda4

And no I didn't transpose the 1 and the 2 thats the kernel version that I got when I asked for it, and yes the main partition is on /dev/sda4, may laptop has an sata drive. Sorry for the confusion.

(hd0,3)/boot..... doesn't work wither (12 or 21)

Any other ideas?

John R. Graham · Posted: Mon Aug 27, 2007 10:44 am Post subject:

The "root" statement in grub.conf should point to your "boot" partition, not to your "root" partition. I'd be guessing at your partition layout at this point, but, if you created a "boot" partition, then (hd0,3) is probably incorrect. Why don't you post your partition layout?

- John

Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

/dev/sda1, boot ,ext2 contains /boot
/dev/sda2, ntfs contains xp kernel
/dev/sda3, swap
/dev/sda4, ext3 contains gentoo kernel

Now for some reason every time I load up a live environment to fiddle with things I check fdisk and sda2 is reflagged bootable. Each time I swap it out for sda1, but it keeps resetting. Grub recognizes the xp install just fine.

John R. Graham · Posted: Mon Aug 27, 2007 3:23 pm Post subject:

Okay, change the root line in grub.conf to:

Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

Alright... with a little research I've discovered /boot/boot is symlinked to... (drumroll please) /boot/boot and there is no obvious kernel inside the /boot dir. There is a file named 'kernel' that appears to be a compiled program, but grub won't take it if I pass that as it's argument.

Slightly confusing.

EDIT
Alright, scratch that. I got it working by pointing it to kernel and setting root to (hd0,0). It does however ask for a boot floppy, which I can opt out of, then I get a kernel panic. Something about mounting to an unknown device. I'll post in in a minute.

EDIT
Kernel Panic: unable to mount root fs on block(2,0)

Bad file system or bad instructions?

d2_racing · Posted: Tue Aug 28, 2007 3:00 am Post subject:

ekra · n00b Joined: 05 Jul 2007 Posts: 55 Location: France

Hello,

- You need to enable SATA driver in the kernel
- Could you cat your fstab and list your file system
- cat your grub.conf here

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John R. Graham · Posted: Tue Aug 28, 2007 10:26 am Post subject:

Correct. You almost certainly don't have support for your SATA controller built into your kernel. Reboot the install CD and mount all the partitions like described in the handbook and chroot iinto the environment. Use "lspci" to show you the particulars about your hard drive controller and then rebuild your kernel with support for that hardware built in (i.e., not built as a module).

How did you build your kernel? Manual method or genkernel method?

- John

d2_racing · Posted: Tue Aug 28, 2007 12:10 pm Post subject:

Manual method I guest.
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Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

Hah, that makes sense, I feel like an idiot now.

I built it by hand, but I'm still stumbling around, using the modules that the live CD loaded as a reference, and I enabled all of them (dozen and a half or so) as kernel components (not modules). There were a few that I couldn't find, I'm still not very good at locating the module I need from the output of lspci. I really wish there was a quick way to do this.

I'll fiddle with that this afternoon and see what I can come up with.

-Thanks

John R. Graham · Posted: Tue Aug 28, 2007 5:13 pm Post subject:

Well, if you like, post the relevant output from lspci and we'll try to help.

- John

d2_racing · Posted: Tue Aug 28, 2007 5:43 pm Post subject:

Yeah, a custom kernel need a little bit of tweaking

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Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

0000:00:12.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 family) Serial ATA Storage Controllers cc=IDE (rev 01)

I went in to make menuconfig and poked around for ich7 southbridge drivers, intel - related sata drivers, 82801, ghm... nothing turned up anything that looked like what I wanted. Any ideas?

NeddySeagoon · Posted: Wed Aug 29, 2007 6:18 pm Post subject:

Peace Frog,

Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

Alright, well I get past the kernel panic. It seemed that it was looking for /dev/hda4 not /dev/sda4 The problem now is that I'm not sure if it is finding what it wants. I went back and changed grub.conf to reference hda4, and renamed the partitions to Hda in fstab, and now I get a superblock error after it starts loading the kernel.

fsck.ext3 Bad magic number in super-block while trying to open /dev/(s)(h)da3 (I tried with both hda and sda)

Now... /dev/(h)(s)da3 is my swap partition.... and I've checked it isn't an ext3 partition by any means, it's linux swap (id 82)...

I just love it when problems migrate :~}

NeddySeagoon · Posted: Wed Aug 29, 2007 7:50 pm Post subject:

Peace Frog,

It sounds like your swap line in /ect/make.conf is in error.

If swap failed to mount, or that was your only warning/error, the system should still operate normally. Does it?
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Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

No, I get the option to try and fix it, or ctrl-d through. If I ctrl-d through it it unmounts everything thats already mounted and reboots.

NeddySeagoon · Posted: Wed Aug 29, 2007 8:01 pm Post subject:

Peace Frog,

As you get that far, your root filesystem is mounted read only and the system trying to check it.
Your system uses the root=/dev/sda4 in the kernel line to know where root is to mount it and the / (root) entry in /etc/fstab to discover where root is for checking.

As root is clearly mounted the root filesystem entry in /etc/fstab must be wrong. Proceed as follows. Boot to the error message and five the root password.
You are now 'in' but root is readonly. Continue with

Peace Frog · Apprentice Joined: 12 Dec 2006 Posts: 185

Well... the only thing I can see that looks wrong is that the swap partition's mounting instructions read 'none'. Other than that fstab looks fine.

/dev/sda1 - boot - ext2 - noauto,noatime - 1 2
/dev/sda3 - / - ext3 - noatime - 0 1
/dev/sda2 - none - swap - sw - 0 0
/dev/cdrom - /mnt/cdrom - audo - auto,ro - 0 0

What should sda2 be mounted to?

Paapaa · l33t Joined: 14 Aug 2005 Posts: 955 Location: Finland