ISO file crashes NIC driver?

[Alan Garrison]

Marcel gave me a hard drive with two ISO images.  I hooked 
the drive up to one of my workstations with the intent to 
transfer the ISO to my server (where my CD burner is).  I 
can get to the ISO files on the workstation, no problem.  
The MD5 sigs match.  On the workstation, I first tried to simply: 
  cp /mnt/disk/blah.iso /share1/iso
where "/share1" is a NFS mounted drive on my server.  After 
the transfer, I MD5'ed the ISO in /share1/iso from the 
server terminal, and the MD5 sig didn't match.  I then noticed 
back on my workstation that my NFS drive got disconnected.  It 
turns out that the NFS process either crashed or something 
else odd happened.  There was an "oops" screendump, but I'm 
not sure what crashed.  I next tried to FTP the ISO, but 
the proftpd server did the same thing:  crashed on some 
"oops" message.  The oops message wasn't clear on what 
caused the problem (given that I'm not a system level guy).
Does this sound like a NIC driver problem, given that both 
NFS and proftpd crapped out on me?

I swapped out the motherboard in my server for a newer one 
a month ago.  It and the NIC have operated normally since 
then for usual size files.  I have tried two different 
NICs in the server, both have the oops problem with the 
large ISO files.

Server:  300Mhz system, and either a Linksys 10/100 NIC 
or a Netgear 10/100 NIC (both Tulip chipset), Debian 
Slink.

I'm sure I can just hook Marcel's drive directly into my 
server, but I want to figure out what is wrong with my 
server first.  I can probably give a better description 
of the situation later today since I was about 90% asleep 
when doing this yesterday.

Oh, and once I do get the ISO files on my server, I can 
burn SuSE 6.4 "Evaluation" and Mandrake 7.1 CD's for 
anyone.