Date: Mon, 6 Dec 2004 11:10:25 +0000 (GMT) From: Jan Grant <Jan.Grant@bristol.ac.uk> To: Alex Teslik <alex@acatysmoof.com> Cc: List freebsd-questions <freebsd-questions@freebsd.org> Subject: Re: 300Gb hard drive formatting to 249Gb - boo. Message-ID: <Pine.GSO.4.61.0412061106530.28569@mail.ilrt.bris.ac.uk> In-Reply-To: <20041206095017.M3602@acatysmoof.com> References: <20041206095017.M3602@acatysmoof.com>
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On Mon, 6 Dec 2004, Alex Teslik wrote: > [root]/home/alex# df -h > Filesystem Size Used Avail Capacity Mounted on > /dev/ad1s1e 271G 1.0K 249G 0% /1 This is an FAQ: see http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/disks.html#DISK-MORE-THAN-FULL and the -m option of tunefs(8): http://www.freebsd.org/cgi/man.cgi?query=tunefs&sektion=8 Summary: the filesystem needs "elbow room" to operate under typical load; this 8% space is reserved. (It may be consumed by the root user, if required.) Tuning down the reserved percentage is not recommended unless you know what you're doing (that is: benchmark your typical usage to see if the performance is still within acceptable limits). -- jan grant, ILRT, University of Bristol. http://www.ilrt.bris.ac.uk/ Tel +44(0)117 9287864 or +44 (0)117 9287088 http://ioctl.org/jan/ You know something's gone badly wrong when your algorithm takes O(n^2) time but uses O(2^n) space.
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