Date: 05 Apr 2000 09:39:43 -0400 From: Lowell Gilbert <lowell@world.std.com> To: "David J. Kanter" <djkanter@nwu.edu>, freebsd-questions@freebsd.org Subject: Re: Fsck on mounted filesystems Message-ID: <rd6og7oy8dc.fsf@world.std.com> In-Reply-To: "David J. Kanter"'s message of Mon, 3 Apr 2000 19:20:07 -0500 References: <20000403192007.A59646@localhost.localdomain>
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"David J. Kanter" <djkanter@nwu.edu> writes: > I've got a questions that stems from my past Linux use: can fsck -p be run > safely on mounted filesystems, like the root filesystem? > > I ask this because the instructions for make world say to go into single > user mode with "shutdown now" and then run fsck -p. I did this, and all > seemed OK, but fsck was run on mounted filesystems, such as /. > > The first thing you learn about Linux is to not run fsck on a mounted > partition, like /. > > So, why can I do it safely (apparently) with FreeBSD but not with Linux? The short answer is that, no, you can't safely fsck a mounted filesystem on FreeBSD either. You're more likely to get away without damaging it, but "more likely" isn't much of a guarantee. Normally, if you really need to fsck on the run, you should shut down to single-user mode first, and dismount the filesystem. We do make an exception for the root filesystem, which is often fsck'd while mounted read-only. - Lowell To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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