Date: Wed, 7 Aug 2002 13:02:09 -0400 From: Rob Ellis <rob@web.ca> To: Stephen Hoover <shooverfbn@442spot.com> Cc: Danny Pansters <danny@ricin.com>, freebsd-questions@freebsd.org Subject: Re: Questions about vinum and failure of root partition Message-ID: <20020807170209.GC53552@web.ca> In-Reply-To: <MOEJLOFPGBFEEOIFFMLKIEBNDCAA.shooverfbn@442spot.com> References: <20020807160227.GB53552@web.ca> <MOEJLOFPGBFEEOIFFMLKIEBNDCAA.shooverfbn@442spot.com>
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On Wed, Aug 07, 2002 at 11:15:53AM -0500, Stephen Hoover wrote: > Subject: Re: Questions about vinum and failure of root partition > > >i'm not sure about putting /usr on the vinum mirror as > >i've seen recommended -- you often want /usr in > >single user mode. > > Now this is getting out of my realm of experience, but why > is that an issue? I have my /usr mirrored with vinum and when > I dropped down to single usr mode to do an installworld for > instance, I just start vinum and mount the volume. > i guess i'm anticipating having to go into single user to deal with problems without running vinum -- for instance, problems with vinum / remounting partitions? ... maybe vinum is solid enough that that's not an issue... if you do want to put /usr on a vinum partition, you're back to the bootstrapping problem -- where to install /usr during the freebsd install, what to do with that space afterwards. i guess you could (still with the 2 slice model) install /usr on ad2s2b, install vinum, copy /usr to the vinum mirror, reassign ad2s2b as swap? ad2s2b would have to be big enough for a minimal /usr install, which is probably reasonable anyway...? i haven't really figured out what to do about /tmp -- leaving it on / seems like a bad idea, symlinking it somewhere else seems bad too (again, for single user). i saw a recommendation to make it an 'mfs' filesystem (man mfs_mount), but putting that in /etc/fstab /dev/ad0s1b /tmp mfs rw 0 0 seems to assign the whole swap partition to it, which means having multiple swap partitions (to add actual swap). if you run mount_fs with '-s', you can limit the number of sectors used by the mfs filesystem -- which would be nice: you could have a large swap for crashdumps, use some of it for /tmp and some of it for swap. the problem is figuring out where to put the mount_mfs command -- rc.local runs too late in the boot process... - rob To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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