[plug] restoring from tape

[Craig Ringer]

> To list the contents of the tape to stdout (may want to filter it!):
>  tar -ztvf /dev/st0

Tip: if you know its in a given subdirectory or whatever, you can
tar tvzf /dev/st0 mysubdir/
and it'll only list the contents of that subdirectory.

> To then restore a file to the pwd once you know its name/path in the tape
> archive:
>  tar -xzvf /dev/st0 path/to/file

Though you may well need to drop the z from the arguments if you don't 
compress the data going onto the tape. I use DDS2 and haven't found it 
to make a difference whether or not I do compresison in software, since 
the drive does some pretty powerful hardware-driven data compression 
anyway - and not compressing saves on CPU time and leads to a faster 
backup, at least in my case.

-- 
Craig Ringer
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