Date: Sat, 16 Mar 1996 15:21:15 +0530 From: A JOSEPH KOSHY <koshy@india.hp.com> To: hackers@freebsd.org Subject: NFS problems w/ HPUX 9.0.5 Message-ID: <199603160951.AA119769876@fakir.india.hp.com>
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Hi,
This one has me stumped at the moment.
I'm mounting a disk from an HPUX 9.0.5 machine via NFS. I find that if
I'm reading/writing simultaneously from the remote disk data gets corrupted.
The same sequence of operations across two FreeBSD boxes works fine.
Here is how to replicate the problem: consider two machines, `REMOTE'
and a FreeBSD box `LOCAL'.
on REMOTE : export /fs1 -maproot=root etc
from LOCAL :
copy /usr/src/sys to REMOTE:/fs1/sys # copy tree first
on LOCAL:
cd REMOTE:/fs1; # reads only
find ./sys -type f -print | xargs md5 > /tmp/md5-r
This gets you the first set of checksums.
Then on LOCAL do the following two commands simultaneously on the
remote mounted partition.
cd REMOTE:/fs1/sys; mkdir ../sys2;
find . -print | cpio -pdum ../sys2 & # copy tree and ...
cd REMOTE:/fs1;
find ./sys -type f -print | xargs md5 > /tmp/md5-rw # read it
Ie. we run the checksumming on the original tree while the copy
over NFS is in progress.
Diff /tmp/md5-r /tmp/md5-rw | more
--> lots of differences if `REMOTE' was not a FreeBSD box
--> no problems if `REMOTE' is a FreeBSD box
Incidentally the same procedure repeated across two HPUX boxes works fine.
So it looks like there is some kind of NFS incompatibility between FreeBSD
and HPUX. I don't have access to any Suns that I could test against.
I'd be interested to know if any others on the list have encountered this
problem. Is there anything I can do to work around this problem?
I'm running FreeBSD 2.1.0-RELEASE on a P5/16MB/500MB-IDE HP Vectra.
Koshy
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