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Xref: sserve comp.periphs.scsi:19585 comp.os.386bsd.questions:9858 Newsgroups: comp.periphs.scsi,comp.os.386bsd.questions Path: sserve!newshost.anu.edu.au!munnari.oz.au!bunyip.cc.uq.oz.au!harbinger.cc.monash.edu.au!msuinfo!agate!howland.reston.ans.net!pipex!barclay!usenet From: PostMaster@barclays.co.uk X-Disclaimer: These views are the poster's and not necessarily those of Barclays Subject: Re: 6% UNIX overhead on SCSI disk? Message-ID: <Co8zCo.13L@barclays.co.uk> Followup-To: comp.periphs.scsi,comp.os.386bsd.questions Sender: news@barclays.co.uk Organization: Barclays Bank Plc. X-Newsreader: TIN [version 1.2 PL2] References: <FEN.94Apr13121431@imagine.comedia.com> Date: Thu, 14 Apr 1994 11:46:00 GMT Lines: 23 Fen Labalme (fen@imagine.comedia.com) wrote: : I've just installed the Maxtor, disklabled it, newfs'd and mounted it. : Yea! But when I did a `df` I saw that I was missing 6.1% of the disk! : The Conner drive's overhead appears to be only about 2.9%, which is : definatley more reaonable. But 6% of a 1.2 GB drive is 74 MB !!!! In Linux this 'missing space' is reserved for the superuser and defaults to 10% (I think...). This means that if a non-root process fills a disk, root can still have some space on the disk to work with. This is particularly important if it's your root disk that fills up.... It can be specified when the filesystem is made using mke2fs. Hopefully newfs has similar functionality. Mike -- Mike Civil Unix Systems Support Team internet Mike.Civil@barclays.co.uk Barclays Computer Operations (home mike@duncodin.demon.co.uk) Poole Computer Centre 81 Sopers Lane Poole, Dorset BH17 7BB, UK Phone +44 (0)202 642351