[QUOTE=gjackson123;302888413]

Code:

 
# zfs send -R -p rpool@001 | zfs recv -d backups/usbdrive

This is dubious, as I already wrote, you need specific options to import a root pool, at least a different root mountpoint.
There are many factors that might affect the performance of such a command.
Yes, but I suspect there will be errors because you'll end up with multiple file systems with the same mount point.

No. If you want to create a file, just redirect zfs send to it. This is what the link to the documentation I posted does.
You might just pipe through gzip.
There is no way I'm aware of to list the content of such a datastream, moreover, as it usually contains volumes and snapshot, it won't be as stratforward as with a tar or cpio of ufsdump.
The only way to make sure a stored datastream is valid and list the files it contains is to extract (receive) it somewhere.