Date: Thu, 23 May 1996 09:43:03 +0100 From: "Gary Palmer" <gpalmer@FreeBSD.ORG> To: "Marc G. Fournier" <scrappy@ki.net> Cc: Scott Donovan <sdd@ccd.tas.gov.au>, freebsd-questions@FreeBSD.ORG Subject: Re: Missing Disk Space (df -k) Message-ID: <13387.832840983@palmer.demon.co.uk> In-Reply-To: Your message of "Thu, 23 May 1996 01:16:50 EDT." <Pine.NEB.3.93.960523011512.21150B-100000@ki.net>
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"Marc G. Fournier" wrote in message ID <Pine.NEB.3.93.960523011512.21150B-100000@ki.net>: > On Thu, 23 May 1996, Scott Donovan wrote: > > /dev/sd2s1 8740426 8054724 -13534 100% /u3 > > Okay.. Where has my missing 700Mbytes gone ? > > Anyone got any ideas.. Or is this just a symptom of a sick file store? > Approximately 10% of a file system is reserved (set aside) for > fragmentation algorithms. That 10% *is* writable by root, but by > no other, so you can reach a negative value on it. Actually, 10% was the OLD *BSD default (probably 4.3 days). I believe it was reduced in 4.4Lite, and David bumped it back up to 8%. RCS file: /mnt/usr/home/ncvs/src/sys/ufs/ffs/fs.h,v Working file: fs.h [...] revision 1.4 date: 1995/03/10 22:18:16; author: davidg; state: Exp; lines: +2 -2 Increased default minfree to 8%. This was before 2.0.5-RELEASE, so anything formatted after that will have the 8% minfree value, which works out about right for a 700Mb space shortage on a 9Gb drive. You can alter this value if you like dicing with your filesystem performance. See tunefs(8). Gary -- Gary Palmer FreeBSD Core Team Member FreeBSD: Turning PC's into workstations. See http://www.FreeBSD.ORG/ for info
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