Re: Use tar to append?

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On Friday 09 March 2007, Mike McCarty wrote:
>Cameron Simpson wrote:
>> Maybe:
>>   tar Af tarfile more-files...
>First one needs tar cf...
>Apparently tar Af does not work unless the tar file already
>> Seems like it should do the trick. It should be efficient if the
>> tarfile is not compressed. But I'm saying this on the basis of the
>> info file for GNU tar, and I'm presuming that "A" is more efficient
>> than "r", though the info file is... vague... about this (to be
>> charitable).
>Yes, indeed.
>Well, I tried it, and it's taking longer and l.o.n.g.e.r and
>l..o..n..g..e..r for each new diretory. It just timed /usr/src
>and it took over 2 minutes to back up 48 kilobytes. It's copying
>and copying or seeking and seeking or sth.

Did you perchance put tars output file IN the directory its backing up.  
That's a recursive situation that will only die when you kill it, or the 
drive is full.  The latter generally isn't pretty.

Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Photographing a volcano is just about the most miserable thing you can do.
		-- Robert B. Goodman
	[Who has clearly never tried to use a PDP-10.  Ed.]

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