Date: Mon, 31 Dec 2018 08:24:16 +0100 From: Polytropon <freebsd@edvax.de> To: The Doctor <doctor@doctor.nl2k.ab.ca> Cc: The Doctor via freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: Read Only Single Mode Message-ID: <20181231082416.6a12e12b.freebsd@edvax.de> In-Reply-To: <20181231070023.GA80127@doctor.nl2k.ab.ca> References: <20181230191513.GB15230@doctor.nl2k.ab.ca> <20181231041609.aa9924c1.freebsd@edvax.de> <20181231070023.GA80127@doctor.nl2k.ab.ca>
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On Mon, 31 Dec 2018 00:00:23 -0700, The Doctor wrote: > On Mon, Dec 31, 2018 at 04:16:09AM +0100, Polytropon wrote: > > On Sun, 30 Dec 2018 12:15:13 -0700, The Doctor via freebsd-questions wrote: > > > How do you correct read only devices in single mode? > > > > What do you mean with "to correct"? If you are refering to > > disk devices to be checked and repaired by fsck, this only > > works on unmounted or read-only devices (while unmounted is > > the preferred state). But if "to correct" means how to mount > > a read-only device in read/write mode, i. e., re-mount, then > > the command "mount -uw <device>" (-u = update, -w = write) > > is to be used. > > > > Did I understand your question correctly? ;-) > > > > > More than likely. > > What is happening is a ufs file system oince in single user mode > is not wanting to mount when I type in > mount -a and that is not usually the case. There is a reason for this specific behaviour, and the reason is intended: If the filesystem is in an inconsistent state, it cannot be mounted. Often you can force a read-only mount, but you should run fsck first in such a case (usually on the unmounted device). When you receive the message that the filesystem has been marked clean, a normal r/w mount should be possible again. This is what "mount -a" usually does in SUM, according to the options set in /etc/fstab - as long as the filesystems in question are clean. That's why a common procedure is "fsck && mount -u / && mount -a". :-) See "man 8 mount" for details. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
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