mount issue with kernels >2.6.11

mount issue with kernels >2.6.11

[Yiannis Mavroukakis]

Hi,

I'm running reiser4 on 2.6.11-mm4 at the moment. I compiled 2.6.13-mm1 
(and subsequently a few more kernel version in-between)  as a 
replacement, only to find out that it blows up in my face when the root 
fs is due to be mounted:

VFS: Cannot open root device "801" or unknown-block
Unable to mount root fs on unknown-block (8,1)

Now, I am not sure this is due to reiser4, I suspect some change in the 
LSI MegaRaid legacy driver
that may be the culprit, but I wanted the opinion of the list first, 
before I go crying to someone else :)

Thank you,

Yiannis.

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Re: mount issue with kernels >2.6.11

[Mathieu]

Yiannis Mavroukakis <jander@darthvader.us> disait dernièrement que :

> Hi,
>
> I'm running reiser4 on 2.6.11-mm4 at the moment. I compiled 2.6.13-mm1 
> (and subsequently a few more kernel version in-between)  as a 
> replacement, only to find out that it blows up in my face when the root 
> fs is due to be mounted:
>
> VFS: Cannot open root device "801" or unknown-block
> Unable to mount root fs on unknown-block (8,1)

not a reiser4 error. your kernel does not see your harddrive.

> Now, I am not sure this is due to reiser4, I suspect some change in the 
> LSI MegaRaid legacy driver
> that may be the culprit, but I wanted the opinion of the list first, 
> before I go crying to someone else :)

you got it :)

-- 
Mathieu

Re: mount issue with kernels >2.6.11

[David Masover]

Mathieu wrote:
> Yiannis Mavroukakis <jander@darthvader.us> disait dernièrement que :
> 
> 
>>Hi,
>>
>>I'm running reiser4 on 2.6.11-mm4 at the moment. I compiled 2.6.13-mm1 
>>(and subsequently a few more kernel version in-between)  as a 
>>replacement, only to find out that it blows up in my face when the root 
>>fs is due to be mounted:
>>
>>VFS: Cannot open root device "801" or unknown-block
>>Unable to mount root fs on unknown-block (8,1)
> 
> 
> not a reiser4 error. your kernel does not see your harddrive.

So the first thing to do is, try taking a rescue disk, using its config 
(/proc/config.gz if you can't find it anywhere else), compiling your 
kernel for it, and using your kernel on someone else's disk.  A simple 
disk, like RIP, should work.  That way, you can check if your kernel 
works, if you can mount reiser4 (maybe on a ramdisk?), and you can try 
various modules and options to try and find your hard disk.