Date: Thu, 4 Apr 1996 15:07:09 +0930 (CST) From: Michael Smith <msmith@atrad.adelaide.edu.au> To: s_koyin@eduserv.its.unimelb.EDU.AU (HMG coA reductase) Cc: freebsd-questions@FreeBSD.ORG Subject: Re: sysinstall's newfs Message-ID: <199604040537.PAA25004@genesis.atrad.adelaide.edu.au> In-Reply-To: <199604040305.NAA10219@eduserv.its.unimelb.EDU.AU> from "HMG coA reductase" at Apr 4, 96 01:05:04 pm
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HMG coA reductase stands accused of saying: > > G'day all. I have some observations regarding the state of the filesystem > after installing a new copy of FreeBSD. Apparently the sysinstall defaults > for newfs are grossly inappropriate and lead to a badly optimised file- > system. Actually, the opposite is the case. The code that was developed to try to squeeze the last byte per second out of the old RA-8x disks is being defeated in order to deal with newer disk technology. > Notice that the `a' partition has a physical size of 49152, but the file- > system only uses 48124 blocks(sectors). The `e' partition is worse, with > only 170512 out of 173590 being used. Trauma! 513K lost on your root filesystem and a shocking 1539K on your 'e' partition. Such sloppiness. 8) > Some note worthy points are: > 1. Absence of rotational position table > 2. ntrak value of 1, which should be equal to the no. of heads, or > tracks per cylinder. Both meaningless for ZBR disks. > 3. nsect == npsect == spc which does not tally with the disklabel values. Hmm? nsect == spc would imply cyl == 1, which isn't the caset. > I'm wondering if anyone has noticed such things, and how you've handled it. They're intentionally like that to defeat the old non-optimisations. Nothing is wrong, or requires fixing. > iVan NgeOw -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[
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