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haimat
Apprentice
Joined: 05 Sep 2002
Posts: 239
Location: Vienna / Austria
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 Posted: Wed Sep 26, 2007 9:05 pm Post subject: how to determine root device? |
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Hi all,
on my new machine I have two SATA HDDs, the first for Windows, the second for Linux. After installing Gentoo I merged grub. Now it seems to boot the kernel quite fine, I see all drivers loading (the typical boot screen). Then before it tries to load init I get this "unable to mount root fs" error together with a kernel panic.
I tried it with different grub configurations for the kernel line:
| Code: | kernel /boot/bzImage root=/dev/sda3
kernel /boot/bzImage root=/dev/sdb3
kernel /boot/bzImage root=/dev/sdc3
kernel /boot/bzImage root=UUID=... |
But none of them worked.
Now I wonder, how can I determine which root option I should use?
Kind regards, Matthias
PS: During installation the disk was shown with /dev/hda, but since it's a SATA drive, I googled and found that I have to disable the normal ATA support in kernel, since we want to use the SATA and experimental ATA drivers. I tried to compile the kernel with the normal ATA drivers before, which worked fine (including booting and mounting root device /dev/hda, but with terrible slow disk speed). Since the kernel boots fine I think the driver is ok, but this root device ... |
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mamac
l33t
Joined: 29 Feb 2004
Posts: 890
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| Posted: Wed Sep 26, 2007 9:14 pm Post subject: |
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Hi,
First do you know on which disk you installed Gentoo? sda, b or c?
Then make sure / is on partition number 3.
I had the same issue few weeks ago when I tried to installed Gentoo on my neihgbour's box which has several SATA disks as well but I didn't succeed. Then we decided to give a try to kubuntu!
I didn't have the opportunity to look at the grub.conf generated by kubuntu.
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Dottout
l33t
Joined: 07 Mar 2006
Posts: 882
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| Posted: Wed Sep 26, 2007 9:18 pm Post subject: |
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| check also to have root filesystem support enabled in your kernel |
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haimat
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Joined: 05 Sep 2002
Posts: 239
Location: Vienna / Austria
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| Posted: Wed Sep 26, 2007 9:26 pm Post subject: |
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| I have included ext2 and ext3 drivers in my kernel konfiguration (I use ext2 on boot and ext3 on root partition). Or do you mean something else? |
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haimat
Apprentice
Joined: 05 Sep 2002
Posts: 239
Location: Vienna / Austria
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| Posted: Wed Sep 26, 2007 9:28 pm Post subject: |
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| I installed Gentoo on /dev/hdc3, since the Gentoo LiveCD recoginzes the disk as /dev/hdc. I also have installed Kubuntu on the same machine, there the grub.conf file has used the UUID for the root partition (which I already tried in this case as well with no luck). |
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Dottout
l33t
Joined: 07 Mar 2006
Posts: 882
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| Posted: Wed Sep 26, 2007 9:33 pm Post subject: |
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| haimat wrote: | | I have included ext2 and ext3 drivers in my kernel konfiguration (I use ext2 on boot and ext3 on root partition). Or do you mean something else? |
I was meaning this. If you miss fs support you get the same error at boot |
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mamac
l33t
Joined: 29 Feb 2004
Posts: 890
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| Posted: Thu Sep 27, 2007 5:49 am Post subject: |
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| haimat wrote: | | I installed Gentoo on /dev/hdc3, since the Gentoo LiveCD recoginzes the disk as /dev/hdc. I also have installed Kubuntu on the same machine, there the grub.conf file has used the UUID for the root partition (which I already tried in this case as well with no luck). |
Sorry, I didn't pay attention to your P.S. in your first message. 
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Jason5876
n00b
Joined: 06 Sep 2007
Posts: 6
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Kernel & Hardware
