> The zfs send stream is dependent on the version of
> the filesystem, so the 
> only way to create an older stream is to create a
> back-versioned 
> filesystem:
> 
>       zfs create -o version=N pool/filesystem
> You can see what versions your system supports by
> using the zfs upgrade 
> command:

Thanks for the feedback.  So if I have a version X pool/filesystem set, does 
that mean the way to move it back to an older version of TANK is to do 
something like:
* Create OLDTANK with version=N
* For each snapshot in TANK
** (cd tank_snapshot; tar cvf -) | (cd old_tank; tar xvf -)
** zfs snapshot oldtank the_snapshot_name

This seems rather involved to get my current files/snaps into an older format.  
What did I miss?

Thanks again,
Marty
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