Why o why, my nfs was working ....?

I was doing my development over ethernet for the past few months (tftp and
nfs). About two weeks ago I switched to the SD card to see if things are
working on the SD too.

Today I switched back to development mode over ethernet but nothing works
anymore.

When I try to update over ethernet I get the following error:

mini2440:/ update -t barebox -d nand
T DHCP client bound to address 192.168.1.41
host 192.168.1.44 is alive

erasing partition /dev/nand0.barebox.bb


flashing barebox-image to /dev/nand0.barebox.bb

TFTP from server 192.168.1.44 ('barebox-image' -> '/dev/nand0.barebox.bb')
        #############################
mini2440:/ update -t rootfs -d nand
T DHCP client bound to address 192.168.1.41
host 192.168.1.44 is alive

erasing partition /dev/nand0.root.bb

Skipping bad block at 0x07680000
Skipping bad block at 0x07f80000
Skipping bad block at 0x07fa0000
Skipping bad block at 0x07fc0000
Skipping bad block at 0x07fe0000

flashing root.jffs2 to /dev/nand0.root.bb

TFTP from server 192.168.1.44 ('root.jffs2' -> '/dev/nand0.root.bb')

tftp failed: Invalid argument

The same goes for booting over ethernet, the kernel boots over ethernet but
not the rootfs:

eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
Sending DHCP requests ., OK
IP-Config: Got DHCP answer from 0.0.0.0, my address is 192.168.1.41
IP-Config: Complete:
     device=eth0, addr=192.168.1.41, mask=255.255.255.0, gw=192.168.1.1,
     host=192.168.1.41, domain=, nis-domain=(none),
     bootserver=0.0.0.0, rootserver=0.0.0.0, rootpath=
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available
partitions:
1f00             512 mtdblock0  (driver?)
1f01             384 mtdblock1  (driver?)
1f02            2048 mtdblock2  (driver?)
1f03          128128 mtdblock3  (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(2,0)
Function entered at [<c003cb0c>] from [<c02ca098>]
Function entered at [<c02ca098>] from [<c0008e8c>]
Function entered at [<c0008e8c>] from [<c0008f6c>]
Function entered at [<c0008f6c>] from [<c00090a8>]
Function entered at [<c00090a8>] from [<c0008ae8>]
Function entered at [<c0008ae8>] from [<c0038a1c>]

What could be wrong??

Did you take a look into the log files of your TFTP and NFS server?

Syslog says:

atftpd Requested file to big, increase BLKSIZE

In the past I had this issue with tftpd and switched over to atftpd
(advanced) to resolve this problem, but now I get the same problem even
with the advanced tftp???

Another very nice article on setting up a tftp server

This article resolved my issue using the tftpd-hpa server now

The article::

http://processors.wiki.ti.com/index.php/Setting_Up_a_TFTP_Server