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Weird df info
I did a small experiment to compare gzip and bzip2, and noticed a very
strange thing with the reporting of free diskspace. "zz" is just a
copy of the first 89 MB of /dev/zero. :-) Now look at this:
alexsh:~> ls -l zz*
-rw------- 1 alexsh alexsh 89088000 Jan 14 19:41 zz
-rw-r--r-- 1 alexsh alexsh 6793 Jan 14 19:49 zz.bz2
-rw-r--r-- 1 alexsh alexsh 86489 Jan 14 19:42 zz.gz
alexsh:~> df
Filesystem 1024-blocks Used Available Capacity Mounted on
/dev/hda3 3369806 1160824 2174121 35% /
/dev/hda1 819056 339904 479152 41% /dos
alexsh:~> rm zz*
alexsh:~> df
Filesystem 1024-blocks Used Available Capacity Mounted on
/dev/hda3 3369806 1073388 2261557 32% /
/dev/hda1 819056 339904 479152 41% /dos
alexsh:~> ls -l zz*
ls: No match.
What the hell is going on? Is there some compression the kernel is
doing on filesystem data that I don't know about? FWIW I'm running
2.2.0-pre6. It's not a multiuser system and mine was the only activity
when I did the experiment. Any ideas? Can anyone try it on their
system and tell me if they get the same results?
--
Alex Shnitman
alexsh@linux.org.il UIN 188956
http://members.xoom.com/alexsh -- PGP key here
http://www.debian.org -- and the OS here