Date: Fri, 21 Jan 2005 10:36:47 +1100 From: Gregory Bond <gnb@itga.com.au> To: martin hudec <corwin@aeternal.net> Cc: freebsd-stable@freebsd.org Subject: Re: Higher ATA-Mode -> lower speed Message-ID: <41F0408F.2010607@itga.com.au> In-Reply-To: <20050120192739.GD5431@pleiades.aeternal.net> References: <200501201948.42707.emanuel.strobl@gmx.net> <200501202000.43688.emanuel.strobl@gmx.net> <20050120192739.GD5431@pleiades.aeternal.net>
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martin hudec wrote: > amber# dd if=/dev/zero of=/usr/testfile bs=64k count=2000 > 131072000 bytes transferred in 2.546718 secs (51467023 bytes/sec) > > These are not very usefull tests of raw disk bandwith because they use the filesystem (and are hence subject to the vagiaries of block allocation, etc) and are not likely to be very repeatable or comparable. Nore are the big enough or long enough to reduce the variance of the result or cover one-off spikes (e.g. what if it is running just when a cron job happens to kick off?)
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