Date: Thu, 26 Apr 2007 15:52:05 -0500 From: Barry Pederson <bp@barryp.org> To: Pawel Jakub Dawidek <pjd@FreeBSD.org> Cc: freebsd-fs@FreeBSD.org Subject: Re: ZFS: inherited mountpoints with root filesystem Message-ID: <463110F5.1090102@barryp.org> In-Reply-To: <20070426170824.GO41670@garage.freebsd.pl> References: <462F65DB.5010305@barryp.org> <20070426170824.GO41670@garage.freebsd.pl>
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Pawel Jakub Dawidek wrote: > On Wed, Apr 25, 2007 at 09:29:47AM -0500, Barry Pederson wrote: >> 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'. So you're saying that if you're doing vfs.root.mountfrom="zfs:tank" in loader.conf, then tank's mountpoint should be "legacy"? I'm trying that now, but the drawback there is that the sub-filesystems like "tank/home" also inherit that "legacy" mountpoint, so they have to be manually listed in /etc/fstab. That seems to carry on down to sub-sub filesystems like "tank/home/bob" and so on. So you lose out on the nice auto-mounting feature in ZFS. I was hoping that booting with vfs.root.mountfrom="zfs:tank" would be equivalent to something like: zpool import -R / I wonder now if it wouldn't have been better to have created the pool as an Alternate Root Pool in the first place. Is there a way to change an existing pool's mountpoint to '/' like an Alternate Root pool? A simple "zfs set mountpoint=/" doesn't fly because it wants to unmount root to do it. I'd kind of need to change it, but not have it take effect immediately. Barryhome | help
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