[OpenIndiana-discuss] export pool at shutdown and import at boot up

[Edward Ned Harvey (openindiana)]

> From: Bill Sommerfeld [mailto:sommerfeld at alum.mit.edu]
> 
> On 05/27/13 17:25, Edward Ned Harvey (openindiana) wrote:
> > I have some external storage which isn't super reliable.  If I don't
> > export it before shutdown, it will often cause the boot to fail, as
> > it doesn't mount properly.
> >
> > I would like to make that pool automatically export during shutdown,
> > or somehow flag it so the system will never try to import or mount it
> > during bootup.  ... is there a better way, like
> > setting some sort of pool property, or sticking a flag in some
> > defaults file, or tweaking the zfs cache file or something?
> 
> See the -c cachefile option to zpool import and the "cachefile" pool
> property; pools that aren't listed in the default system pool cache file
> aren't auto-imported at boot time.

Looks like this should do it:
zpool set cachefile=none externalpool

Or if I wanted to do it manually, 
zpool import -c none externalpool