*BSD News Article 73270


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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: NFS swap problem in diskless 2.1
Date: 9 Jul 1996 21:45:35 GMT
Organization: Private BSD site, Dresden
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ve@k96.kapitza.ras.ru (Vladimir Eltsov) wrote:

Sorry, i have no ideas about your other problems.  I'm in the NFS
diskless business only for a few days now, and my server is FreeBSD.

> Now all work OK --- until first shutdown. After 'shutdown -h now' system
> claims that root unmount failed -- file system busy (Is it normal for NFS 
> root?).

It seems so.  I'm also getting this, but obviously, it's benign.
(After all, even hitting the reset button is not supposed to get an
NFS server into an inconsistent state.)

Is it possible that your Slowaris NFS server sometimes trashes your
device nodes?  Note that FreeBSD uses 32-bit major/minor numbers, this
is not a problem for the NFS protocol (not even for NFSv2 -- it did
infact reserve one 32-bit integer field for these numbers), but might
be a problem for some server.  The upper bits are only rarely used, so
you might not immediately notice the problem.  Watch out for things
like /dev/rsd0.ctl which have the 0x20000000 bit set in the minor
number.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)