Re: [PLUG] Debian df command reports wrong usage on root partition

[Lee Marzke <lee@marzke.net>]

bergman@merctech.com wrote:
> In the message dated: Wed, 09 Aug 2006 18:49:14 EDT,
> The pithy ruminations from Lee Marzke on 
> <[PLUG] Debian df command reports wrong usage on root partition> were:
> => This is a multi-part message in MIME format.
> => --------------040008070203060506030204
> => Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> => Content-Transfer-Encoding: 7bit
> => 
> => I'm having a weird problem on a Debian 3.1 system.   After moving Gb of
> => data from the root partition to /var ( and replacing those directories 
> => with symlinks )
> => my root partition is still full.
>
> Ah, this is basically a question that I use when conducting interviews...
>
>
> Let me take some wild guess...
>
> 	You moved data from /var/log.
>
> 	You haven't restarted syslog (or rebooted).
>
> Here are some hints for tools that may help figure things out:
> 	fuser
> 	lsof
>
> Hint:
> 	how does "rm" work?
>
> 		man 2 unlink
>
>
>
>   

OK,   I didn't touch  /var/log, and the system has been rebooted a few times
in the last month since I noticed the problem.

lsof | grep tmp shows a 20G file in /tmp
python2.3 5056       zope    6u      REG        8,3  20971520     700398 
/tmp/tmpeAnx7E (deleted)

This doesn't show up in a directory listing,  and only exists when Zope 
is running.

So what is this, and why is df showing this ?   Running Zope on SuSE, 
did not do this.

Thanks,

Lee

> Finally, here are some nice explanations:
>
> 	http://blogs.sun.com/roller/page/chrisg?entry=df_and_du
> 	http://www.cyberciti.biz/nixcraft/vivek/blogger/2006/01/freebsd-why-command-df-and-du-reports.php
>
> Mark
> => 
> => Is there some known problem with df ?   Are the LVM mounted
> => volumes causing it problems ?
> => 
> => I've also looked at / with a graphical disk analysis tool,  and all the disk
> => space is taken up by /home and /var -  so why is 14Gb still showing up
> => as used under / ?
> => 
> => df
> => Filesystem                      1k-blocks          Used    Available  
> => Use%   Mounted on
> => /dev/sda2/                            87857        19645      73171    
> => 22%   /boot
> => /dev/sda3/                      17299036  14649436  1770848    90%   /
> => /dev/mapper/sys-home   30963708  20959920   8430924   72%   /home
> => /dev/mapper/sys-var      20970876    8716796  12254080   42%  /var
> => 
> => 
> => If I add the size of all partitions ( excluding /boot,  /home and /var )
> => I get  1.5Gb,  however the df command above shows 14Gb in use.
> => 
> => Here are the sized reported by du for all directories except in /boot, 
> => /home, /var
> => 
> => /tmp           24
> => /bin        3112
> => /dev         852
> => /lib     128472
> => /root      4500
> => /etc    404432
> => /usr  1021440
> => Total  1.54  Gb
> => 
> => Also,  the disks are on a Adaptec 2400  IDE RAID controller,  HW RAID 1
> => that appear as SCSI drives  sda2, sda3 JBOD, and the rest as LVM
> => 
> => Thanks,
> => 
> => Lee Marzke
> => 
>
> -----
> Mark Bergman    Biker, Rock Climber, Unix mechanic, IATSE #1 Stagehand
>
>   

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n:Marzke;Lee
email;internet:lee@marzke.net
tel;work:800 393 5217
tel;home:610 454 9354
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