Help: kernel option root=/dev/nfs failing 2.6.10

Help: kernel option root=/dev/nfs failing 2.6.10

[Haven Skys]

I am attempting to create network bootable system with 2.6.10 and nfs and am
having trouble.

I am using grub and the boot goes without a hitch until the kernel attempts
to use the commands I've sent.

<SNIP from grub.conf>
bootp
root (nd)
kernel (nd)/redhat-2.6.10/kernel root=/dev/nfs ip=bootp
nfsroot=10.0.120.1:/diskless/redhat-2.6.10/
baseos
</SNIP>

Network booting machine X does fine until. It attempts to open the root
device.

<SNIP>
VFS: Cannot open root device "nfs" or unknown-block(0,255) Please append a
correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount
root fs on unknown-block(0,255) </SNIP>

It looks like the kernel isn't recognizing the virtual device /dev/nfs but
I've enabled all the NFS options and everything is compiled into the kernel.

Any ideas?


Thanks
Haven
 
 




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Re: Help: kernel option root=/dev/nfs failing 2.6.10

[Matthias-Christian Ott]

Haven Skys wrote:

>I am attempting to create network bootable system with 2.6.10 and nfs and am
>having trouble.
>
>I am using grub and the boot goes without a hitch until the kernel attempts
>to use the commands I've sent.
>
><SNIP from grub.conf>
>bootp
>root (nd)
>kernel (nd)/redhat-2.6.10/kernel root=/dev/nfs ip=bootp
>nfsroot=10.0.120.1:/diskless/redhat-2.6.10/
>baseos
></SNIP>
>
>Network booting machine X does fine until. It attempts to open the root
>device.
>
><SNIP>
>VFS: Cannot open root device "nfs" or unknown-block(0,255) Please append a
>correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount
>root fs on unknown-block(0,255) </SNIP>
>
>It looks like the kernel isn't recognizing the virtual device /dev/nfs but
>I've enabled all the NFS options and everything is compiled into the kernel.
>
>Any ideas?
>
>
>Thanks
>Haven
> 
> 
>
>
>
>
>FrontBridge introduces Message Archive and Secure Email. Get leading Enterprise Message Security services from FrontBridge. www.frontbridge.com.
>
>
>
>-
>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>Please read the FAQ at  http://www.tux.org/lkml/
>
>  
>
Hi!
I did you follow the "tutorial" in Documentation/nfsroot.txt?

Matthias-Christian Ott

RE: Help: kernel option root=/dev/nfs failing 2.6.10

[Haven Skys]

Thanks.  Yes I have.
Here are a couple configuration options I have set:

CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y

CONFIG_NFS_FS=y
CONFIG_NFS_V3=y
CONFIG_NFS_V4=y
CONFIG_NFS_DIRECTIO=y
CONFIG_NFSD=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V4=y
CONFIG_NFSD_TCP=y
CONFIG_ROOT_NFS=y

Everything is textbook really.  I followed several different examples and
still nothing works.


-----Original Message-----
From: linux-kernel-owner@vger.kernel.org
[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Matthias-Christian
Ott
Sent: Wednesday, February 16, 2005 11:09 AM
To: Haven Skys
Cc: linux-kernel@vger.kernel.org
Subject: Re: Help: kernel option root=/dev/nfs failing 2.6.10

Haven Skys wrote:

>I am attempting to create network bootable system with 2.6.10 and nfs and
am
>having trouble.
>
>I am using grub and the boot goes without a hitch until the kernel attempts
>to use the commands I've sent.
>
><SNIP from grub.conf>
>bootp
>root (nd)
>kernel (nd)/redhat-2.6.10/kernel root=/dev/nfs ip=bootp
>nfsroot=10.0.120.1:/diskless/redhat-2.6.10/
>baseos
></SNIP>
>
>Network booting machine X does fine until. It attempts to open the root
>device.
>
><SNIP>
>VFS: Cannot open root device "nfs" or unknown-block(0,255) Please append a
>correct "root=" boot option Kernel panic - not syncing: VFS: Unable to
mount
>root fs on unknown-block(0,255) </SNIP>
>
>It looks like the kernel isn't recognizing the virtual device /dev/nfs but
>I've enabled all the NFS options and everything is compiled into the
kernel.
>
>Any ideas?
>
>
>Thanks
>Haven
> 
> 
>
>
>
>
>FrontBridge introduces Message Archive and Secure Email. Get leading
Enterprise Message Security services from FrontBridge. www.frontbridge.com.
>
>
>
>-
>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>Please read the FAQ at  http://www.tux.org/lkml/
>
>  
>
Hi!
I did you follow the "tutorial" in Documentation/nfsroot.txt?

Matthias-Christian Ott
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/



FrontBridge introduces Message Archive and Secure Email. Get leading Enterprise Message Security services from FrontBridge. www.frontbridge.com.

Re: Help: kernel option root=/dev/nfs failing 2.6.10

[Matthias-Christian Ott]

Haven Skys wrote:

>Thanks.  Yes I have.
>Here are a couple configuration options I have set:
>
>CONFIG_IP_PNP=y
>CONFIG_IP_PNP_DHCP=y
>CONFIG_IP_PNP_BOOTP=y
>CONFIG_IP_PNP_RARP=y
>
>CONFIG_NFS_FS=y
>CONFIG_NFS_V3=y
>CONFIG_NFS_V4=y
>CONFIG_NFS_DIRECTIO=y
>CONFIG_NFSD=y
>CONFIG_NFSD_V3=y
>CONFIG_NFSD_V4=y
>CONFIG_NFSD_TCP=y
>CONFIG_ROOT_NFS=y
>
>Everything is textbook really.  I followed several different examples and
>still nothing works.
>
>
>-----Original Message-----
>From: linux-kernel-owner@vger.kernel.org
>[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of Matthias-Christian
>Ott
>Sent: Wednesday, February 16, 2005 11:09 AM
>To: Haven Skys
>Cc: linux-kernel@vger.kernel.org
>Subject: Re: Help: kernel option root=/dev/nfs failing 2.6.10
>
>Haven Skys wrote:
>
>  
>
>>I am attempting to create network bootable system with 2.6.10 and nfs and
>>    
>>
>am
>  
>
>>having trouble.
>>
>>I am using grub and the boot goes without a hitch until the kernel attempts
>>to use the commands I've sent.
>>
>><SNIP from grub.conf>
>>bootp
>>root (nd)
>>kernel (nd)/redhat-2.6.10/kernel root=/dev/nfs ip=bootp
>>nfsroot=10.0.120.1:/diskless/redhat-2.6.10/
>>baseos
>></SNIP>
>>
>>Network booting machine X does fine until. It attempts to open the root
>>device.
>>
>><SNIP>
>>VFS: Cannot open root device "nfs" or unknown-block(0,255) Please append a
>>correct "root=" boot option Kernel panic - not syncing: VFS: Unable to
>>    
>>
>mount
>  
>
>>root fs on unknown-block(0,255) </SNIP>
>>
>>It looks like the kernel isn't recognizing the virtual device /dev/nfs but
>>I've enabled all the NFS options and everything is compiled into the
>>    
>>
>kernel.
>  
>
>>Any ideas?
>>
>>
>>Thanks
>>Haven
>>
>>
>>
>>
>>
>>
>>FrontBridge introduces Message Archive and Secure Email. Get leading
>>    
>>
>Enterprise Message Security services from FrontBridge. www.frontbridge.com.
>  
>
>>
>>-
>>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>>the body of a message to majordomo@vger.kernel.org
>>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>Please read the FAQ at  http://www.tux.org/lkml/
>>
>> 
>>
>>    
>>
>Hi!
>I did you follow the "tutorial" in Documentation/nfsroot.txt?
>
>Matthias-Christian Ott
>-
>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>the body of a message to majordomo@vger.kernel.org
>More majordomo info at  http://vger.kernel.org/majordomo-info.html
>Please read the FAQ at  http://www.tux.org/lkml/
>
>
>
>FrontBridge introduces Message Archive and Secure Email. Get leading Enterprise Message Security services from FrontBridge. www.frontbridge.com.
>
>
>
>
>  
>
Your config looks good. Try to give the kernel the "nfsroot=" parameters 
and try to boot from the harddisk to see if the client really gets the 
bootp information correctly.

Matthias-Christian Ott