From: Maximus <john.maximus@gmail.com>
Subject: Nfs Server not responding ?
Date: Wed, 6 Jul 2005 07:32:46 -0400
Message-ID: <3634de7405070604326a08bedd@mail.gmail.com>
Reply-To: Maximus <john.maximus@gmail.com>
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Hi,
  I am getting the following error in my system

I have a root file system ar /home/rootfs

I dont know what is the problem. please help.

The Kernel is getting copied on target ; But root file system is not
getting mounted
using NFS.

The Kernel and the root file system is in the same machine
XX.YY.13.112.

IP-Config: Got DHCP answer from XX.YY.13.112, my address is XX.YY.13.65
IP-Config: Complete:
      device=3Deth0, addr=3DXX.YY.13.65, mask=3D255.255.255.0,
gw=3D255.255.255.255,
     host=3DXX.YY.13.65, domain=3D, nis-domain=3D(none),
     bootserver=3DXX.YY.13.112, rootserver=3DXX.YY.13.112,
rootpath=3D/home/rootfs
Looking up port of RPC 100003/2 on XX.YY.13.112
Looking up port of RPC 100005/1 on XX.YY.13.112
Root-NFS: Server returned error -13 while mounting /home/rootfs
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: No root yet, retrying to mount root on nfs (unknown-block(2,0))
VFS: No root yet, retrying to mount root on nfs (unknown-block(2,0))
VFS: No root yet, retrying to mount root on nfs (unknown-block(2,0))
VFS: No root yet, retrying to mount root on nfs (unknown-block(2,0))
VFS: No root yet, retrying to mount root on nfs (unknown-block(2,0))
VFS: No root yet, retrying to mount root on nfs (unknown-block(2,0))
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=3D" boot option
Kernel panic: VFS: Unable to mount root fs on unknown-block(2,0)

File : /etc/exports looks like this
/home/rootfs (rw,no_root_squash,no_all_squash)

File:/etc/dhcpd.conf looks this this

ddns-update-style ad-hoc;
allow bootp;
subnet XX.YY.13.0 netmask 255.255.255.0 {
default-lease-time 1209600;
max-lease-time 31557600;
group {
host hello.i2.com {
hardware Ethernet 00:0E:99:XX:YY:ZZ;
fixed-address XX.YY.13.65;
option root-path "/home/rootfs";

}
}
}


I also face one more issue i am facing is:
   i have 2 kernels (both of them 2.6.12) made out of the same
defconfig but compiled using 2 different tool chains.

For Kernel1:

If I specify bootargs=20
mem=3D30M console=3DttyS0,115200 rw root=3D/dev/nfs
nfsroot=3DXX.YY.13.112:/home/rootfs ip=3DXX.YY.13.65:XX.YY.13.112

it Works.

Otherwise it does not work ?.

For Kernel2:
Does not work with the above bootargs

Works Only if bootargs are mem=3D30M console=3DttyS0,115200 rw root=3D/dev/=
nfs=20

Please advice,

I dont know what the problem is ?.

How to analyse the problem and solve it ?.


Regards,
John


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