From owner-freebsd-small Tue Apr 4 12:31:12 2000 Delivered-To: freebsd-small@freebsd.org Received: from mail4.mmcable.com (fe4.rdc-kc.rr.com [24.94.163.51]) by hub.freebsd.org (Postfix) with ESMTP id 7B5A837B77C for ; Tue, 4 Apr 2000 12:31:08 -0700 (PDT) (envelope-from jss@subatomix.com) Received: from vulcan ([24.27.131.184]) by mail4.mmcable.com with Microsoft SMTPSVC(5.5.1877.357.35); Tue, 4 Apr 2000 14:31:06 -0500 Message-ID: <005a01bf9e74$9d2bc6b0$2aa85c0a@vulcan> From: "Jeffrey S. Sharp" To: "Warner Losh" Cc: "freebsd-small" References: <001f01bf9e6a$3a0b3c00$2aa85c0a@vulcan> <200004041836.MAA70239@harmony.village.org> Subject: Re: Mounting and Corruption Rehashed Date: Tue, 4 Apr 2000 15:30:27 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6700 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6700 Sender: owner-freebsd-small@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > : The problem was this little paragraph from `man mount`: > : > : > Switching a filesystem back and forth between asynchronous > : > and normal op­eration or between read/write and read/only > : > access using ``mount -u'' may gradually bring about severe > : > filesystem corruption. > : > : Someone spoke up and said that they had actually > : experienced this corruption. > > I've not seen corruption. However, I oly change one or > two files somewhat infrequently and tend to reboot often > when I'm changing the underlying filesystem. Good. I don't need to change stuff much or often in my application, either. However, as soon as I get something booted using flash as root, I'll do some testing to see if heavy writes + repeated remounting does indeed cause corruption in a DiskOnChip. > The superblock gets updated from time to time. Aye, there's the rub! > Also, when things are mounted r/o you can power off at any > time and know that the filesystem will be stable when you > come back. Aye, there's the other rub! =============================== Jeffrey S. Sharp (XorAxAx) jss@subatomix.com -----BEGIN GEEK CODE BLOCK----- Version 3.12 GCS/IT/MU d-@ s-:+ a21 C++(++++) UBL+(+++$)> P L+(+++$)> E+> W++ N+(++) o? K? w++$> !O M(-) !V PS+ PE Y PGP- t+ 5 X+ R(+) tv+ b+ DI++(+++) G++ e> h--- r+++ y+++ ------END GEEK CODE BLOCK------ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-small" in the body of the message