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dbbolton
n00b
Joined: 22 Apr 2009
Posts: 44
Location: WV
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 Posted: Thu Jun 18, 2009 6:06 pm Post subject: VFS panic |
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My root partition (sda7) is in an extended partition (sda1) but I'm getting a kernel panic from VFS saying it can't open root device sda or unknown block (2,0). It also says "here are the available partitions" but none are listed. I'm 200% sure that I built ext2 and ext3 into my kernel.
Here is my fdisk -l with comments added:
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livecd ~ # fdisk -l
Disk /dev/sda: 203.9 GB, 203928109056 bytes
255 heads, 63 sectors/track, 24792 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x000936f4
Device Boot Start End Blocks Id System
/dev/sda1 1 6079 48829536 5 Extended
/dev/sda2 6080 7903 14651280 83 Linux #debian /
/dev/sda3 7904 24681 134769285 83 Linux #debian /home
/dev/sda4 24682 24792 891607+ 82 Linux swap / Solaris #debian swap
/dev/sda5 1 9 72229+ 83 Linux #gentoo /boot
/dev/sda6 10 72 506016 82 Linux swap / Solaris #gentoo swap
/dev/sda7 73 1289 9775521 83 Linux #gentoo /
/dev/sda8 1290 6079 38475643+ 83 Linux #gentoo /home
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Here is my /etc/fstab for the gentoo system:
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/dev/sda5 /boot ext2 noauto,noatime 1 2
/dev/sda7 / ext3 noatime 0 1
/dev/sda6 none swap sw 0 0
/dev/cdrom /mnt/cdrom auto noauto,ro 0 0
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And my Grub entry (from the debian system, but grub is in the mbr)
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root (hd0,4)
kernel /boot/kernel-2.6.29-gentoo-r5 root=/dev/sda7
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eccerr0r
Watchman
Joined: 01 Jul 2004
Posts: 9882
Location: almost Mile High in the USA
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| Posted: Thu Jun 18, 2009 11:17 pm Post subject: |
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If no partitions are listed, likely you have your disk drivers omitted from your kernel ('N' or 'M' -- they need to be built in). Check your kernel config to make sure your drivers are built-in. Make sure you've got all your necessary libata or legacy-ata or other scsi drivers built in.
You can use modules - but the only way to put your disk drivers as modules is if you use an initrd. Not recommended to do manually, but I hear genkernel does this fine...
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Intel Core i7 2700K/Radeon R7 250/24GB DDR3/256GB SSD
What am I supposed watching? |
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Peach
Advocate
Joined: 08 Mar 2003
Posts: 3686
Location: London, UK
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| Posted: Fri Jun 19, 2009 9:03 am Post subject: Re: VFS panic |
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| dbbolton wrote: | My root partition (sda7) is in an extended partition (sda1) but I'm getting a kernel panic from VFS saying it can't open root device sda or unknown block (2,0). It also says "here are the available partitions" but none are listed. I'm 200% sure that I built ext2 and ext3 into my kernel.
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And my Grub entry (from the debian system, but grub is in the mbr)
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root (hd0,4)
kernel /boot/kernel-2.6.29-gentoo-r5 root=/dev/sda7
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it's not clear if you can load debian but not gentoo
the error is when trying to access gentoo isn't it?
the error you're reporting seems to point to a wrong root parameter passed to the kernel.
This means that the gentoo kernel could use a different partition mapping (or even different PATA/SATA drivers), this means that sda could be seen as a different partition... just a guess.
how did you compiled the gentoo kernel? did you checked everthing was ok?
I'd wait for some more input from you and a better explanation of what's going on.
Posting the whole grub.conf could help.
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Gentoo user since 2004.
"It's all fun and games, until someone loses an eye" - mom |
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