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Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!haven.umd.edu!uunet!mcsun!Germany.EU.net!gmdtub!daemon From: daemon@bigfoot.first.gmd.de (daemon) Newsgroups: comp.os.386bsd.questions Subject: Re: df's accuracy? Message-ID: <3392@bigfoot.first.gmd.de> Date: 30 Apr 93 19:07:43 GMT References: <1rr944$5ii@lobster.sid.mcet.edu> Organization: GMD-FIRST Lines: 22 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 This is a feature of the BSD filesystem, what you see. The BSD filesystem reserves 10% ( you can also change that ) of the space. This has something to do with the effective working of the internal algorithm, they need enough free space, to get a fast allocation. If you go beyound this 10% free and fill your filesystem from 100% to 110%, it should work a little bit slower. Nothing to worry. ATS ( ats@first.gmd.de or ats@cs.tu-berlin.de ) Andreas Schulz GMD-FIRST O-1199 Berlin-Adlershof Rudower Chaussee 5 Gebaeude 13.7 Tel: +49-30-6392-1856 Germany/Europe