ZFS-only booting on FreeBSD

Daniel Staal DStaal at usa.net
Sat Feb 19 00:18:49 UTC 2011

I've been reading over the ZFS-only-boot instructions linked here:
<http://wiki.freebsd.org/ZFS> (and further linked from there) and have one

Let's say I install a FreeBSD system using a ZFS-only filesystem into a
box with hotswapable hard drives, configured with some redundancy.  Time
passes, one of the drives fails, and it is replaced and rebuilt using the
ZFS tools.  (Possibly on auto, or possibly by just doing a 'zpool

Is that box still bootable?  (It's still running, but could it *boot*?)

Extend further: If *all* the original drives are replaced (not at the same
time, obviously) and rebuilt/resilvered using the ZFS utilities, is the
box still bootable?

If not, what's the minimum needed to support booting from another disk,
and using the ZFS filesystem for everything else?

Daniel T. Staal

This email copyright the author.  Unless otherwise noted, you
are expressly allowed to retransmit, quote, or otherwise use
the contents for non-commercial purposes.  This copyright will
expire 5 years after the author's death, or in 30 years,
whichever is longer, unless such a period is in excess of
local copyright law.

More information about the freebsd-questions mailing list