From owner-freebsd-questions@FreeBSD.ORG Thu Jul 24 14:44:23 2003 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8BB6237B401 for ; Thu, 24 Jul 2003 14:44:23 -0700 (PDT) Received: from dan.emsphone.com (dan.emsphone.com [199.67.51.101]) by mx1.FreeBSD.org (Postfix) with ESMTP id CAD6E43FA3 for ; Thu, 24 Jul 2003 14:44:22 -0700 (PDT) (envelope-from dan@dan.emsphone.com) Received: (from dan@localhost) by dan.emsphone.com (8.12.9/8.12.9) id h6OLiMeC087139; Thu, 24 Jul 2003 16:44:22 -0500 (CDT) (envelope-from dan) Date: Thu, 24 Jul 2003 16:44:22 -0500 From: Dan Nelson To: David Kelly Message-ID: <20030724214421.GG32490@dan.emsphone.com> References: <004501c3521d$e8532c40$3501a8c0@pro.sk> <20030724201242.GC32490@dan.emsphone.com> <200307241542.09377.dkelly@HiWAAY.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200307241542.09377.dkelly@HiWAAY.net> X-OS: FreeBSD 5.1-CURRENT X-message-flag: Outlook Error User-Agent: Mutt/1.5.4i cc: FreeBSD-Questions@freebsd.org Subject: Re: Defragment HDD X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Jul 2003 21:44:23 -0000 In the last episode (Jul 24), David Kelly said: > On Thursday 24 July 2003 03:12 pm, Dan Nelson wrote: > > The FFS filesystem reserves 8% of the disk space so that it can > > allocate contiguous blocks for files. > > It happens to serve that function, but I understood the reserve is > for root so that users can not fill filesystems and kill root > processes. The reserve does not apply to UID 0. No, it's really for the filesystem; see the tuning manpage, under -m. The root thing is because under Unix, you must always allow root to shoot itself in the foot :) -- Dan Nelson dnelson@allantgroup.com