Date: Thu, 03 Apr 2003 12:13:31 +0200 From: Heinrich Rebehn <rebehn@ant.uni-bremen.de> To: Jan Grant <Jan.Grant@bristol.ac.uk> Cc: questions@freebsd.org Subject: Re: newfs parameters for a 500 GB volume ? Message-ID: <3E8C094B.6030503@ant.uni-bremen.de> In-Reply-To: <Pine.GSO.4.44.0304030957530.22089-100000@mail.ilrt.bris.ac.uk> References: <Pine.GSO.4.44.0304030957530.22089-100000@mail.ilrt.bris.ac.uk>
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Jan Grant wrote: >On Thu, 3 Apr 2003, Heinrich Rebehn wrote: > > > >>Hi, >> >>I am repeating the post below, because it obviously hasn't made it to >>the list (at least i did not get it back from the list). >> >>Can someone please give me some advice, because i will be setting up the >>discs today. >> >>Thank you >> >> >>Hi, >> >>I am going to set up a RAID 0 array with two 250G drives, making 500G. >>Which newfs parameters would you recommend for it? >> >> > >As many cylinders per group as possible. I think newfs has an "infinity" >setting to pick the right number. > > > >>I am afraid of ending up with a fs with Gigs of space and no inodes >>left, or a fs that is heavily fragmented and slow. >>Reading the newfs manpage didn't quit help me, it explains all switches >>The files on the volume will be 2 MB average. >> >> > >There's a "bytes per inode" setting that you can plug this figure into. >You might want to be a little more generous with inodes than that (give >yourself some elbow room). You need inodes for symlinks and directories >too. > > Thank you for your reply. I have reread the manpage and would go for: - blocksize => 64 kB - fragsize => 64/8 => 8 kB - bytes/inode => 16 kB Are these values reasonable or should i use higher values (because the disk is so large?) Heinrich
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