Re: NetBSD/ofppc boots multiuser on Pegasos

[Simon Burge <simonb%NetBSD.org@localhost>]

=?ISO-8859-1?Q?Jorge_Acereda_Maci=E1?= wrote:

> Simon Burge wrote:
> > =?ISO-8859-1?Q?Jorge_Acereda_Maci=E1?= wrote:
> > 
> > 
> >>I finally got NetBSD/ofppc to boot multiuser via NFS on a Pegasos II 
> >>motherboard. NFS reads are ok, but writes are broken (I suspect of a 
> >>firmware bug, something to do with packet size, but have to verify it).
> > 
> > 
> > Does
> > 
> >     options NFS_BOOT_RWSIZE=1024
> > 
> > help?  This can help tremendously when your ethernet driver and/or
> > hardware isn't up to scratch where all the UDP retries on reads or
> > writes kill NFS.
> 
> Indeed. It helps to the point that without that option it doesn't even 
> mount root :-)

Heh :)

> Maybe you have a theory on what's going on. When I copy a file, what I 
> get on the NFS server is a file of the same size, but with chunks of 
> zeros interleaved, that is:
> 
> 0x0000 <correct data>
> 0x1000 <zeros>
> 0x2000 <correct data>
> 0x3000 <zeros>
> ...

No ideas offhand.  That's a page size which may or may not mean
anything.

I wonder what happens if you do something like:

        dd if=/netbsd of=/tmp/foo bs=4k count=1 seek=1

do you zeros or real data at 0x1000 in /tmp/foo ?  Still, I'm not
sure what that proves either if it works or not...

Simon.