Re: [gentoo-user] Re: Please help, kernel can not load root

[Joshua Murphy <poisonbl@gmail.com>]

On Sun, Apr 29, 2012 at 20:11, Ignas Anikevičius <anikevicius@gmail.com> wrote:
> On 29 April 2012 18:35, Ignas Anikevičius <anikevicius@gmail.com> wrote:
>>
>> Hello,
>>
>> it's been several since I have tried to make my machine boot again without
>> any live CDs and I could not narrow the main issue down. The problem is that
>> the kernel can not mount the root partition.
>>
>> Some info about my system:
>> running ~amd64
>> kernel: gentoo-sources-3.3.3
>> bootloader: grub2-9999 (grub.cfg generated with grub2-mkconfig -o
>> /boot/grub2/grub.cfg)
>> root partition is ext4, but ext4 is built into kernel
>> I have a separate /boot partition
>>
>> my grub.cfg can be found here:
>> http://pastebin.com/nm6HCkpM
>>
>> I have written down some log messages from the last boot. Sorry if
>> something is not 100% accurate as I took a crappy picture with my phone and
>> tried to rewrite everything:
>> http://pastebin.com/0zQN6X5t
>>
>> I would very appreciate someones help.
>>
>> Thanks,
>> Ignas A.
>
>
> Hello to everybody once more. I gave it ago and installed drivers for all
> storage related controllers, but nothing has changed. As I understand, the
> hdd is recognized, so I do not know where to look now.
>
> The log can be see in this image:
> http://s10.postimage.org/hieljd661/29042012017.jpg
>
> I tried to rewrite it here:
> ======================================================================
> ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> ata1.00: ACPI cmd ...
> ...
> ata1.00: configured for UDMA/133
> scsi 0:0:0:0: Direct-Access ATA WDC WD3200...
> ...
> ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> ata2.00: ACPI cmd ...
> ata2.00: ATAPI: Optiarc DVD RW AD-...
> ..
> ata2.00: configured for UDMA/100
> scsi 1:0:0:0: CD-ROM
> registered taskstats version 1
>     Magic number...
> pci_link ... : hash matches
> console ... enabled
> netconsole: network logging started
> Root-NFS: no NFS server address
> VFS: Unable to mount root fs via NFS, trying floppy
> VFS: Cannot open root device "sda7" or unknown-block(2,0)
> Please append a correct "root=" boot option: here are the available
> partitions:
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(2,0)
> Pid: 1, comm: swapper/0 Not tainted 3.3.3-gentoo #7
> Call Trace:
>     ... panic
>     ... ? printk
>     ... mount_block_root
>     ... mount_root
>     ... prepare_namespace
>     ... kernel_init
>     ... kernel_thread
>     ... ? start_kernel
>     ... ? gs_change
> panic occured, switching back to text console
> ==========================================================================
>
> Thanks,
> Ignas
>

Well, going through the list that comes to mind after that... the
block device itself, since the scsi layer sees the device but the VFS
layer doesn't see the block device:
CONFIG_BLOCK=y
CONFIG_BLK_DEV_SD=y


-- 
Poison [BLX]
Joshua M. Murphy