SM to tape is described in Data ONTAP manuals; it requires (obviously) tape drive connected to FAS. As your system most likely does not have SCSI port, it has to be drive with FC connection. It does not matter whether this drive is in a library or not.
You will have to manually load tape. Then on source system do “snapmirror store source_vol tape_name”, move system (and possibly tape drive) to destination system and do “snapmirror restore destination_vol tape_drive”. The effect is the same as after doing “snapmirror initialize –S source:source_vol destination_vol”.
If volume does not fit on one tape, you will be prompted to exchange media; you can also specify multiple tape devices in “store” command.
