> I've downloaded the 2008.05 release of Open Solaris
> and am planning to install it on a spare machine and
> use it as a NAS for my local network with all the
> data I care about stored on a ZFS RAIDZ pool. I used
> to use Solaris a few years ago but I've never set up
> ZFS before.
> 
> As I understand it booting from ZFS and using ZFS for
> the root filesystem is not currently supported out of
> the box at the moment so I'll need to use the
> standard filesystem for that. 
> 
> Since the root filesystem won't be using RAIDZ I'm
> wondering what would happen if that disk failed. I'm
> not worried so much about the data since I could just
> reinstall Solaris, what concerns me is whether I'd
> lose any of the ZFS configuration data and whether I
> should take any steps to backup the machines ZFS
> configuration.
> 
> In other words, if I have one disk with the root
> filesystem on and 3 disks set up as RAIDZ where does
> ZFS store the information about what disks are using
> ZFS and how they are configured?
> 
> thanks!
> 

zpool get cachefile _pool_name_
if it says default, I think it will actually be the value you'd see if you look 
at
grep ZPOOL_CACHE /usr/include/sys/fs/zfs.h
which should work out to /etc/zfs/zpool.cache (on Solaris - maybe 
/boot/zfs/zpool.cache
on FreeBSD and/or MacOS?)

It'd be better if you had root mirrored, and raidz or raidz2 (or a 
concatenation of mirrors,
if you need max write performance) for the rest.  Best I leave it to someone 
that knows
what the installer can support along those lines to suggest a particular layout 
strategy.
 
 
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