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From: storm@cs.mcgill.ca (Marc Wandschneider)
Subject: Re: df's accuracy?
Message-ID: <1993Apr30.150535.6370@sifon.cc.mcgill.ca>
Sender: news@sifon.cc.mcgill.ca
Organization: SOCS - Mcgill University, Montreal, Canada
References: <1rr944$5ii@lobster.sid.mcet.edu>
Date: Fri, 30 Apr 1993 15:05:35 GMT
Lines: 28
In article <1rr944$5ii@lobster.sid.mcet.edu> johnj@lobster.sid.mcet.edu (John Jackson) writes:
>Hi all!
>
>
> I have a question for you. I have a 498MB partition for news.
>I have noticed that when the filesystem get to having ~450MB in it df reports
>that it is 100% used and no space is left. However, news being the
>volumnous thing that it is, occasionally usage has gotten ahead of my zealous
>expiration efforts and filled the filesystem up to ~470MB. At that point
>df reports that there is actually negative space available and that it is
>~104% full. My question is, why does df say that the filesystem is at
UNIX file systems tend to reserver something like 10% of the disk
for their own use---optimization space and i-node information or something
like that (I'm not sure EXACTLY what it is).
Thus, on a 500MB partition, you'll get a full disk after you've put
450MB of stuff on it (since 50MB are held)....However, sometimes the system
will still let you cram a few extra megs onto the drive, hence the 104%
capacity.
Toodlepip!
Marc 'em.
--
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storm@cs.mcgill.ca SOCS Staff, McGill University
Marc Wandschneider (514)398-5924
386bsd--ftp agate.berkeley.edu:/pub/386BSD/386bsd-0.1, mail for FAQ info