[ale] writing to tape

[Greg Freemyer]

Jim,

Your reading too quick I suspect.

ssh server1 xxx | yyy

says run xxx on the remote machine and pipe its output to the local process yyy.

So effectively server1 is being backed up to a local tape drive.

Greg

On Tue, Feb 2, 2010 at 12:56 PM, Jim Kinney <jim.kinney at gmail.com> wrote:
> 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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-- 
Greg Freemyer
Head of EDD Tape Extraction and Processing team
Litigation Triage Solutions Specialist
http://www.linkedin.com/in/gregfreemyer
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