On 30/07/2008, at 6:17 AM, Jeremy Chadwick wrote: > I believe it is possible (with or without the patch) to boot purely > off > of ZFS. The ish.com.au document describes how to do this in "Step > Three: solving the ZFS boot problem". > > https://www.ish.com.au/solutions/articles/freebsdzfs > > I simply choose not to utilise that method. I'm a bit paranoid about > non-UFS root filesystems. My main concern revolves around booting > into > single-user, which is an important part of the whole build/install > world > process -- does it actually work with ZFS as a root fs, and if so, is > any sort of craziness required to accomplish it? Our article referenced above does still involve a UFS root filesystem, but once the boot process gets under way it is moved out of the way and replaced with the live ZFS root partition. We've had no problem booting into single user mode with this setup. The main down side is that you have a small extra bootable UFS partition (ours are 1Gb) with a kernel and absolutely basic system which is used for nothing more than bootstrapping the system. Oh, and it takes a while to wrap your brain around the whole concept. Having the extra partition means that every time you do make installkernel you'll also need to copy that kernel from the live ZFS root into the UFS partition. That's a nuisance to have to remember. On the plus side, you get to have your entire live filesystem under ZFS and whatever snapshot/RAID/backup/encryption/other ZFS neat feature you care to throw at it. Ari Maniatis --------------------------> ish http://www.ish.com.au Level 1, 30 Wilson Street Newtown 2042 Australia phone +61 2 9550 5001 fax +61 2 9550 4001 GPG fingerprint CBFB 84B4 738D 4E87 5E5C 5EFA EF6A 7D2E 3E49 102AReceived on Wed Jul 30 2008 - 07:44:17 UTC
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