GNU bug report logs - #21270
gzip huge filesize problem

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Alexander Kleinsorge <aleks <at> physik.tu-berlin.de>
To: bug-gzip <at> gnu.org
Subject: gzip huge filesize problem
Date: Sat, 15 Aug 2015 23:42:20 +0200

Hi Gzip team,

I compressed a 500 GB file (raw hdd image) using gzip 1.6 under Ubuntu 
14.10 (64 bit). uncompressing the file gives a file with 500 gb 
(checked).
But "gzip -l" shows bad (small) uncompressed_size and bad ratio 
(-5167%).

Below you can see some details, but I think it is a general bug.
Thanks for help, Alexander


gzip -l asus.gz
compressed        uncompressed  ratio uncompressed_name     99630975185  
        1891655680 -5166.9% asus

gzip --version
gzip 1.6

Linux myname 3.16.0-43-generic #58-Ubuntu SMP Fri Jun 19 11:04:02 UTC 
2015 x86_64 x86_64 x86_64 GNU/Linux

the 2 files (compressed 93gb + uncompressed 500gb)

-rwxrwx--- 1 root plugdev 99630975185 Aug 15 21:39 asus.gz
-rwxrwx--- 1 root plugdev 500107862016 Aug 14 09:00 sdc.raw
-rwxrwx--- 1 root plugdev 93G Aug 15 21:39 asus.gz
-rwxrwx--- 1 root plugdev 466G Aug 14 09:00 sdc.raw

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