Date: Thu, 4 Jun 1998 03:45:53 -0400 (EDT) From: Adrian Filipi-Martin <adrian@nvl.virginia.edu> To: Doug White <dwhite@resnet.uoregon.edu> Cc: Brett Paden <paden@designstein.com>, questions@FreeBSD.ORG Subject: Re: Partition at 109%?? Message-ID: <Pine.HPP.3.96.980604034218.21377B-100000@huron.nvl.virginia.edu> In-Reply-To: <Pine.BSF.3.96.980603132043.24531E-100000@gdi.uoregon.edu>
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On Wed, 3 Jun 1998, Doug White wrote: > On Wed, 3 Jun 1998, Brett Paden wrote: > > > Is this merely as safety precaution, or is this a weird bug I am > > witnessing? > > Safety precaution. The filesystem reserves 10% of the space for a buffer > by default. Root can override that limit and use it, but your filesystem > performance will suffer, and no one else will be able to write to the > filesystem. Well, the fact that root can write to the filesystem past the 100% mark could be considered a security feature. I think it is more technically correct to say that the 10% reserved disk space is a performance enhancement. It is used to allow the kernel to group blocks of data together to achieve more efficient I/O. If you format a disk with less reserved space or run it until it is 110% full, you will see significant degradation in filesystem performance. Adrian -- adrian@virginia.edu ---->>>>| If I were stranded on a desert island, and System Administrator --->>>| I could only have one OS for my computer, Neurosurgical Visualization Lab ->>| it would be FreeBSD. Think about it..... http://www.nvl.virginia.edu/ ->| http://www.freebsd.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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