Date: Fri, 17 Apr 2015 16:33:45 +0200 From: "lokadamus@gmx.de" <lokadamus@gmx.de> To: Alex Merritt <merritt.alex@gmail.com> Cc: questions@freebsd.org Subject: Re: Disk space allocation Message-ID: <553119C9.1020302@gmx.de> In-Reply-To: <CADK3taJbqXgwBtQhtzCWJ78xxwCzAPg26_M--kSNDs=hWKmw-w@mail.gmail.com> References: <CADK3ta%2B_ky-GrUH8c50s1zYKQ4kU8n0C2dubXYh7r1VrGecHxw@mail.gmail.com> <553113AD.6000502@gmx.de> <CADK3taJbqXgwBtQhtzCWJ78xxwCzAPg26_M--kSNDs=hWKmw-w@mail.gmail.com>
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On 04/17/15 16:25, Alex Merritt wrote: > On Fri, Apr 17, 2015 at 10:07 AM, lokadamus@gmx.de > <lokadamus@gmx.de> wrote: > >> On 04/15/15 20:45, Alex Merritt wrote: >>> 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 _______________________________________________ >>> freebsd-questions@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-questions To >>> unsubscribe, send any mail to " >> freebsd-questions-unsubscribe@freebsd.org" >>> >> Which filesystem and FreeBSD Version you are using? UFS/ UFS2 >> have an option, that in default setting 10% are reserved. So you >> can use your partition with 110%. >> >> Greetings >> > > I am using DragonFly BSD, and "geom" does not seem to be in the > package repository. I mailed here assuming it is not a > distro-specific characteristic. > > The file system is UFS. What do you mean use it with 110%? > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions To > unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" > Well, you can fill up your system with 110% Data using before you get an error of full filesystem. This is reserved space for error handling. But it is an old technic for old HDDs. Look at 8.22: https://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/disks.html#disk-more-than-full This value can be changed on installation. If it can be changed on a running system, i don't know. I didn't test it. Greeting
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