Date: Thu, 18 Mar 2004 11:51:32 +0000 (GMT) From: Jan Grant <Jan.Grant@bristol.ac.uk> To: Kyryll A Mirnenko <mirya@ukrpost.net> Cc: freebsd-questions@freebsd.org Subject: Re: Why does `df` lie about free space (it doesn't) Message-ID: <Pine.GSO.4.58.0403181144230.22926@mail.ilrt.bris.ac.uk> In-Reply-To: <8181264.1079608967049.JavaMail.resin@web.ukrpost.net> References: <8181264.1079608967049.JavaMail.resin@web.ukrpost.net>
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On Thu, 18 Mar 2004, Kyryll A Mirnenko wrote: > >Using "tunefs -m". You need to be really careful doing this, and read > >the man page for tunefs again, particularly the warning about how > >lowering this number can trash your filesystem's performance. > > I don't want that, I need to allow using preserved 8% of disk space > to a little group of non-root users (for ex. postgres & rootty, my > unprivileged user), but noone more. How do I do this? You don't, without hacking filesystem code. The suggestion of another poster to buy more disk is a good one. > >PS. You keep on appearing to confuse the notion of free data >blocks with > >free inodes. They're not the same thing: they are two distinct >resources > >and your filesystem can run out of either pretty much >independently. > > inode(5) descrbes inodes as a table of block addresses kinda FAT but > with variable block sizes inodes point to. That is. It's not really like FAT operation at all; but another responder has given some detail along these lines. -- jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ Tel +44(0)117 9287088 Fax +44 (0)117 9287112 http://ioctl.org/jan/ Theory and practice _are_ the same thing. In theory.
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