From owner-freebsd-questions@FreeBSD.ORG Wed Apr 15 18:45:33 2015 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 3918B3DF for ; Wed, 15 Apr 2015 18:45:33 +0000 (UTC) Received: from mail-ie0-x233.google.com (mail-ie0-x233.google.com [IPv6:2607:f8b0:4001:c03::233]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0415115F for ; Wed, 15 Apr 2015 18:45:32 +0000 (UTC) Received: by iedfl3 with SMTP id fl3so38466034ied.1 for ; Wed, 15 Apr 2015 11:45:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:content-type; bh=jsNYVaHivhDkUBa7iEAIAeObnOCVSpGczo/Jm8kOzVc=; b=H0dsL+6dmPEFps9cLFP0sMrPcBwjrLPr1A2QmodnzTLeAHi/zqXH3cRKuXugZAATPZ ZX8FRm05Ij1ukhEsWUOwiezHhj5/MgZjcd+SOI1LE6uNQCo38G9gtAIM02yUGnWYXYg/ LrjBfQb0QZm43pipt8DcYF6DzhDwRoTPLzW/3hpLaL451K7b7Ve5XyNFJTjmKIHiRvpW UFcZAM9XGqNzLX+Skm3hMFWSxu2D8ZZhzk2HlhlvJUUDyRpnih1aw2CsBGZ/+yVUP7Nt eJoc53eR7gsWR5gXF5bKgJ71hXBILwa2gA1UDxQlVGCSdp51t1I8UWctilwRGXCzRham Rj7g== X-Received: by 10.42.171.8 with SMTP id h8mr32235649icz.25.1429123528352; Wed, 15 Apr 2015 11:45:28 -0700 (PDT) MIME-Version: 1.0 Received: by 10.107.131.194 with HTTP; Wed, 15 Apr 2015 11:45:07 -0700 (PDT) From: Alex Merritt Date: Wed, 15 Apr 2015 14:45:07 -0400 Message-ID: Subject: Disk space allocation To: questions@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Apr 2015 18:45:33 -0000 Hello, File systems such as ext3/4 reserve some amount of space for allocation only by privileged users, which can be adjusted, e.g. tune2fs -m reserved-blocks-percentage /dev/sdaN I installed a BSD system using Virtualbox, giving it an 8GB disk, but 'df' shows an aggregate size among all mount points to be less than the capacity. The minfree parameter to tunefs defaults to 8% (see below) but 8% does not account for the difference in 8189MB capacity vs sum of ca. 6G among all file systems (shown by df). There's ca. 27% of capacity unavailable. What could I be missing here? # fdisk [...] The data for partition 1 is: sysid 165,(DragonFly/FreeBSD/NetBSD/386BSD) start 63, size 16773057 (8189 Meg), flag 80 (active) beg: cyl 0/ head 1/ sector 1; end: cyl 1023/ head 255/ sector 63 # dumpfs /dev/ad0s1a | grep minfree minfree 8% optim time maxcontig 15 maxbpg 2048 # df -hT Filesystem Type Size Used Avail Capacity Mounted on /dev/serno/--.s1a ufs 620M 140M 431M 24% / devfs devfs 1.0K 1.0K 0B 100% /dev /dev/serno/--.s1d ufs 2.2G 396K 2.0G 0% /home /dev/serno/--.s1e ufs 248M 10K 228M 0% /tmp /dev/serno/--.s1f ufs 2.6G 1.5G 882M 64% /usr /dev/serno/--.s1g ufs 248M 213M 15M 93% /var procfs procfs 4.0K 4.0K 0B 100% /proc Thanks! Alex