Date: Tue, 6 Feb 2001 17:29:13 -0800 From: Alfred Perlstein <bright@wintelcom.net> To: Andrew Hesford <ajh3@hecubus.bsdonline.org> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: df output incosistency Message-ID: <20010206172913.F26076@fw.wintelcom.net> In-Reply-To: <20010206184859.A13041@cec.wustl.edu>; from ajh3@hecubus.bsdonline.org on Tue, Feb 06, 2001 at 06:48:59PM -0600 References: <20010206192656.B6939@netmode.ece.ntua.gr> <20010206193532.A7821@sunbay.com> <20010206194115.C7821@sunbay.com> <20010206201042.A7995@netmode.ece.ntua.gr> <20010206184859.A13041@cec.wustl.edu>
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* Andrew Hesford <ajh3@hecubus.bsdonline.org> [010206 16:50] wrote: > While it is technically free, you won't be able to use it in day-to-day > operations. It is reserved for the superuser. I believe it is so that if > something should flood the filesystem, the superuser still has space to > operate on the partition. > > This can result in ridiculous amounts of reserved space for large > partitions, so the larger the filsystem, the lower the percentage that > should be reserved. It's not just that, UFS/FFS does a terrific job of staying unfragmented (notice how there's no defrag for most unix), however, it does start to get fragmented pretty badly once it gets to less that 10-5% free space depending on the size of the disk. So don't make it too small or performance on a 'full' (really nearly full) disk will go to pot. > > I was aware of that, but how come it wasn't marked as used before > > my operational error? Anyway, you basically say that everything is ok, > > and the space is free indeed, although not promptly visible from df? > > > > Thanks a lot for the info. > > > > -past > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-stable" in the body of the message > > -- > Andrew Hesford - ajh3@chmod.ath.cx > "355/113 -- Not the famous irrational number PI, > but an incredible simulation!" > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-stable" in the body of the message -- -Alfred Perlstein - [bright@wintelcom.net|alfred@freebsd.org] "I have the heart of a child; I keep it in a jar on my desk." To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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