Date: Thu, 26 Apr 2007 19:08:24 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Barry Pederson <bp@barryp.org> Cc: freebsd-fs@FreeBSD.org Subject: Re: ZFS: inherited mountpoints with root filesystem Message-ID: <20070426170824.GO41670@garage.freebsd.pl> In-Reply-To: <462F65DB.5010305@barryp.org> References: <462F65DB.5010305@barryp.org>
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[-- Attachment #1 --] On Wed, Apr 25, 2007 at 09:29:47AM -0500, Barry Pederson wrote: > I've been fooling with using ZFS for the root filesystem, and a CompactFlash device to hold a UFS /boot - It seems to work very well, CF devices are big enough that you > can put a pretty full install of FreeBSD on it which is nice for recovery/maintenance work on the real disk. > > One problem I've noticed though is that there's a difference between the mountpoint of a pool's root filesystem that FreeBSD sees and what ZFS sees. For example, the > "mount" command shows" > > tank on / (zfs, local) > > but "zfs list" shows: > > NAME USED AVAIL REFER MOUNTPOINT > tank 1.98G 16.4G 16.7M /tank > > I'm finding that having the "tank" filesystem be "/" and "/tank" simultaneously makes it awkward when creating sub-filesystems, say for example "tank/usr" and "tank/var". > > Currently, they inherit the "/tank" mountpoint, and show up as "/tank/usr" and "/tank/var" - where I'd like them to inherit "/" and end up as "/usr" and "/var". > > For now, I've worked around this with symlinks in the "tank" filesystem like: usr -> tank/usr , but the problem is that when mounting the CompactFlash as root and importing > "tank", it complains that it can't mount "tank/usr" (because the symlink is in the way). > > I've also tried explicity setting the mountpoint for "tank/usr" to "/usr", which is fine except again for when the CF is used as root, which would then conflict with the CF > filesystem's "/usr" > > Is this double-mountpoint setup the way things should be? If so, is/can there be an option to have the ZFS-mountpoint for a root-mounted filesystem also be "/", so that > inherited mountpoints for sub-filesystems are under "/" instead of "/<pool-name>"? For file systems that are mounted not via 'zfs mount -a' (eg. they are mounted by hand or via /etc/fstab), you should set mountpoint property to 'legacy'. -- Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD8DBQFGMNyIForvXbEpPzQRAlwyAJwMS5XA/8pU1V3X49YO8KHsSsu+rgCgtQT6 YIZJsl5WtuCSnoEOSbH3GYI= =Rm7V -----END PGP SIGNATURE-----
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