Date: Mon, 19 Aug 2002 11:20:51 -0400 From: Michael Lucas <mwlucas@blackhelicopters.org> To: Chris Pepper <pepper@reppep.com> Cc: =?iso-8859-1?Q?Aur=E9lien_Nephtali?= <aurelien.nephtali@wanadoo.fr>, stable@FreeBSD.ORG Subject: Re: root (/) not soft-updates by default ? Message-ID: <20020819112051.A14802@blackhelicopters.org> In-Reply-To: <a05200603b986b8c719fa@[129.85.219.160]>; from pepper@reppep.com on Mon, Aug 19, 2002 at 11:03:09AM -0400 References: <20020819144928.GA6628@nebula.wanadoo.fr> <20020819105452.A14530@blackhelicopters.org> <a05200603b986b8c719fa@[129.85.219.160]>
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Well, originally, I had read the message, but not the subject, so I hadn't caught that this was root-only. :) Apparently at some time in the last couple of releases, soft-updates has become the default. I gather that the person who made this change expects every user to understand this intuitively, or that the overwhelming majority of FreeBSD users are running SCSI. :-( ata(4) has instructions on how to disable write caching, and if you do a search on IDE write caching and soft updates, you should get *lots* of messages about this issue. Also some stuff in tuning(7). On Mon, Aug 19, 2002 at 11:03:09AM -0400, Chris Pepper wrote: > At 10:54 AM -0400 2002/08/19, Michael Lucas wrote: > >Hello, > > > >Soft updates does not work well with IDE controllers with write > >caching enabled; you can cause data loss. > > > >Most IDE controllers ship with write caching enabled. > > > >We won't, by default, ship systems which have an unacceptable risk of > >data loss. :-) > > Okay, then I'll ask the next question. Why is this acceptable > on /usr, /var, or other mount points? My 'data' is likely to be > everywhere *but* /. > > If we should be disabling write caching on IDE installations, > can you point me to instructions for the procedure? I'd like to call > it out more in the docs. > > > Thanks, > > > Chris Pepper > > >On Mon, Aug 19, 2002 at 04:49:28PM +0200, Aurélien Nephtali wrote: > >> Hello, > >> > >> What is the reason that the mount point (by default, /) hasn't the flag > >> for soft-updates by default (during the installation), can I set it > > > without data lost ? > > -- > Chris Pepper: <http://www.reppep.com/~pepper/>; > Rockefeller University: <http://www.rockefeller.edu/>; -- Michael Lucas mwlucas@FreeBSD.org, mwlucas@BlackHelicopters.org http://www.oreillynet.com/pub/q/Big_Scary_Daemons Absolute BSD: http://www.AbsoluteBSD.com/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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