Hey guys,

This may be a dumb thought from an end user, but why does it have to be hard 
for ZFS to automatically mount volumes on removable media?

Mounting single volumes should be straightforward and couldn't you just try to 
import any others and just silently fail if any required pieces are missing?  
That way you're using the existing ZFS import behaviour.  It means nothing 
would mount as you insert the first disk of a raid-z volume, but as soon as you 
plug enough of the disks in, ZFS would mount it automatically (albeit in a 
degraded state).

Then once the pool is mounted, the existing SATA and USB auto mount behaviour 
should be enough to incorporate any remaining devices that are inserted.

You might want to just allow simple mounts by default though.  Could you have a 
generic zfs automount property, with settings of 'off', 'simple', 'all'?

Simple pools are definitely going to be the most common usage, but it would be 
nice to have support for more complex setups too.  Especially since this would 
allow people to do things like easily expand their USB pool once it fills up, 
just by adding extra USB drives to the pool.

Ross
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