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Date: Mon, 28 Feb 2011 13:16:27 +0000
From: Arthur Chance <freebsd@qeng-ho.org>
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To: Polytropon <freebsd@edvax.de>
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Cc: freebsd-questions@freebsd.org
Subject: Re: / file system is full, but du does not show that it's full
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On 02/28/11 12:47, Polytropon wrote:
> On Mon, 28 Feb 2011 13:29:59 +0100, Damien Fleuriot<ml@my.gd>  wrote:
>> Slice a (as in: da0s1a) is very likely his /
>>
>> /var is usually slice f
>
> Terminology: Slices are with numbers, partitions are with letters. :-)
>
> E. g. da0s1 is the FreeBSD slice, its partition a = da0s1a is /,
> while /var corresponds to partition da0s1f.

Unless you've got GPT disks where there are usually only partitions and 
they're numbered:

arthur@fileserver> gpart show ada5
=>       34  976773101  ada5  GPT  (466G)
          34          6        - free -  (3.0K)
          40         64     1  freebsd-boot  (32K)
         104    2097152     2  freebsd-ufs  (1.0G)
     2097256    2097152     3  freebsd-ufs  (1.0G)
     4194408    8388608     4  freebsd-swap  (4.0G)
    12583016  964190119     5  freebsd-ufs  (460G)

arthur@fileserver> ls /dev/ada5*
/dev/ada5	/dev/ada5p1	/dev/ada5p2	/dev/ada5p3	/dev/ada5p4	/dev/ada5p5

Personally I prefer labelling everything, which GPT makes easier.