Re: Netboot E250 -- tftp problem
Geert Stappers wrote:
But the '4200 Data Access Error' is a scary one ...
4000 is the default download start address.
4200 is start plus 200. 0x200 is 512 decimal, the size of a default TFTP packet.
How to classify 'Data Access Error' is the challenge.
If there are problems with memory, the 'ok' wouldn't probably not been
show. Just do a simple check by these five separate command at the 'ok'
prompt:
40000 400 dump
40000 400 55 fill
40000 400 dump
40000 400 AA fill
40000 400 dump
to make sure it is really no memory problem.
Hi, I have got a great break through! It seems to be a memory problem!
I have replaced NIC Realtck 8139 with Intel e100, and there is no more
"checksum error now". But it still hang with the second TFTP packet,
leaving me:
ok 4200 Data Access Error
But, when I do
ok 4000 400 aa fill
and then
ok boot net
The TFTP packets hang with the third packet now! I can't believe it!
So I went on and got perfectly to packet 146 or so. I am going tired so
I just did
ok 4000 a00000 aa fill
Then the Openboot hangs!
I power it on again, and did
ok test-all
No error.
Our E250 have 1024MB memory, far more than enough. What seems to be the
problem now?
I am copying the Openboot info (after power on) below:
Sun (TM) Enterprise 250 (2 X UltraSPARC-II 296MHz), Keyboard Present
OpenBoot 3.12, 1024 MB memory installed, Serial #11548348
Ethernet address 8:0:20:b0:36:bc, Host ID: 80b036bc.
--
续本达
Xu, Benda
Fundamental Science of Mathematics and Physics,
Tsinghua University, Beijing, P.R.China
http://learn.tsinghua.edu.cn:8080/2005012177/index.html
http://thirsty.phys.tsinghua.edu.cn/MyWiki/heroxbd
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