On Fri, Feb 21, 2003 at 04:27:47PM +1030, [EMAIL PROTECTED] wrote: > Not being familiar with single user mode, I didn't realise that only / was > mounted in that mode (so why does the handbook put "fsck -p" as the FIRST > command, before "mount -a" ? <sigh>).
That would be because fsck(8) only works effectively on unmounted file systems -- it really doesn't need anything else trying to write stuff to the filesystem while it's trying to fix it. In fact, in single user mode the root partition is initially mounted read-only, precisely so that fsck(8) can fix up the root filesystem without the danger of writes to the partition at the same time. It used to be the case that the instructions explicitly told you to remount the root fs read-write before doing a 'mount -a', but 'mount -a' has done all of that option changing stuff for you automatically for several years now. The new 'background fsck' capability in FreeBSD 5.0 (as I understand it) relies on the capability to treat the filesystems on the newly booted machine as 'snapshots', so that modifications to the fs are held in cache memory and only written out to the disk once the fsck(8) process has finished cleaning up the underlying stuff. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks Savill Way PGP: http://www.infracaninophile.co.uk/pgpkey Marlow Tel: +44 1628 476614 Bucks., SL7 1TH UK To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message