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Path: sserve!newshost.anu.edu.au!munnari.oz.au!bunyip.cc.uq.oz.au!harbinger.cc.monash.edu.au!yeshua.marcam.com!usc!cs.utexas.edu!uunet!nntp.club.cc.cmu.edu!godot.cc.duq.edu!toads.pgh.pa.us!w2xo!durham From: durham@w2xo.pgh.pa.us (Jim Durham) Newsgroups: comp.os.386bsd.questions Subject: Re: [FreeBSD] free diskspace? Message-ID: <19@w2xo.pgh.pa.us> Date: 9 Jan 94 00:51:06 GMT References: <gate.8oaTFc1w165w@subway.hacktic.nl> <CJA41o.8I4@usenet.ucs.indiana.edu> Organization: Jim's Basement Lines: 52 In article <CJA41o.8I4@usenet.ucs.indiana.edu> pitts@mimosa.astro.indiana.edu (Jim Pitts) writes: >In article <gate.8oaTFc1w165w@subway.hacktic.nl>, >Koen Martens <gmc@subway.hacktic.nl> wrote: >> >>I am having a little trouble with my diskspace. When I do an 'df', it >>gives me something like this: >> >>Filesystem 512-blocks Used Avail Capacity Mounted on >>/dev/wd0a 28303 13364 12108 52% / >>/dev/wd0e 266030 142957 96470 60% /usr >>/dev/fd0a 2847 1928 919 68% /mnt >> >>As you can see, for /dev/wd0a 13364+12108 does not equal 28303.. Also, stuff deleted >>reported a negative value for available disk-space! fsck however does >> >>Is this a known problemm? And if yes, could you please tell me what to >>do to fix it?? >> stuff deleted >This is not a problem. When you make a new BSD filesystem 10% of the total >space is reserved as space that only 'root' can write to. When you see stuff deleted >To answer your possible next question, this space is required by the BSD >filesystem. It is used to insure that problems like fragmentation are kept >to a minumum. I am sure that there are ways to make this space avaliable >for general consumption, but I would not suggest doing it. It makes for >a -very- inefficent file system. It is an integral part of the filesystem >itself and is crucial to its proper operation. What you need to do is type "man tunefs", which will give you a discription of /etc/tunefs. tunefs can set many parameters concerned with the disk system, among which is the one discribed in your postings called "minfree". minfree is normally set at 10%, which, as above, is the space held back from normal users. According to the man page, if you set it to 0, you will cut disk throughput by a factor of up to 3, not a good idea. I haven't played with this on FreeBSD, but I have set minfree down to 5% on my Microvax, with minimal problems. -Jim Durham