[ale] writing to tape

Jim Kinney jim.kinney at gmail.com
Tue Feb 2 12:56:31 EST 2010


Just a probably dumb question but why pipe a tar output to a dd? Why not use
Tape ARchiver (tar) directly to write to the tape?
(maybe I should reread the entire thread....)

2010/2/2 Björn Gustafsson <bg-ale at bjorng.net>

> On Mon, Feb 1, 2010 at 10:31 AM, Geoffrey <lists at serioustechnology.com>
> wrote:
> > Greg Freemyer wrote:
> >> What's your command line including pipes.
> >
> > ssh servername "tar -cf - $BackupThis" | dd bs=10k of=/dev/nst0
>
> I don't know if it works with GNU tar, but you might want to try the
> -B switch and/or to set `-b 20' to explicitly match the dd blocksize.
> (20 should be the default though.)
>
> After quickly checking the GNU tar manpage, it seems to indicate that
> -B only works for reads, but it might be worth a try anyway.
>
> --
> Björn Gustafsson
>
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-- 
-- 
James P. Kinney III
Actively in pursuit of Life, Liberty and Happiness
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