[afnog] Untar large files

Phil Regnauld regnauld at nsrc.org
Thu Oct 25 18:58:06 UTC 2012


Veronique Umutesi (veronique.umutesi) writes:
> Dear Hugo
> Here are the outputs:
> method  crc     date  time           compressed        uncompressed  ratio
> uncompressed_name
> defla 2c5f4ca8 Oct 19 18:20        110935750031          2526345216 -4291.2%
> myfile.tar

	2526345216 / 110935750031 * 100 = 2.27%. Something is seriously wrong.
	I wonder what would happen if you tried to compress this file again - I'm
	curious about how much null space is in that 100 GB file...

> gzip --test --verbose myfile.tar.gz:
> myfile.tar.gz:
> gzip: myfile.tar.gz: decompression OK, trailing garbage ignored
>  OK

	It may be possible to fix the bug in gzrecover, but for that to
	happen, you'd have to arrange for remote access to the system where the
	file is residing (sending a 100 GB file over the net would be somewhat
	time consuming).

	Alternatively, you may have to talk to some data recovery specialists.

	Phil



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