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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!metro!news.nsw.CSIRO.AU!mel.dit.csiro.au!munnari.OZ.AU!news.ecn.uoknor.edu!paladin.american.edu!gatech!news.mathworks.com!fu-berlin.de!zib-berlin.de!news.tu-chemnitz.de!irz401!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: panic: update: rofs mod Date: 7 May 1996 20:44:10 GMT Organization: Private BSD site, Dresden Lines: 29 Message-ID: <4mocmq$aut@uriah.heep.sax.de> References: <Dqr3JD.C4o.0.macbeth@cogsci.ed.ac.uk> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.6 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E richard@cogsci.ed.ac.uk (Richard Tobin) wrote: > I have a removeable disk containing a filesystem which can not be > mounted read-write because it was not cleanly dismounted. If I mount > it read-only, when I umount it the system panics with the message > "update: rofs mod". You ought to fsck unclean file systems before mounting (regardless of whether you mount it r/o or r/w -- it's only that the system tries to protect itself by denied r/w for unclean file systems). > It's possible that this is technically not a bug, because it's a file > system that's been mounted under the Hurd, so who knows what > non-standard extensions have been used. On the other hand, I'm > somewhat surprised that it produces this error. For performance reasons, the system must rely on the file system being in a consistent state. It's impractical to check each and any cross- reference, link counter, bitmap entry etc. just when it's being referenced. It's indeed a bit surprising that it tries to update a r/o file system at all -- but i would only consider this a system bug if it also happens for a clean file system. -- 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. ;-)