Date: Sat, 28 Jun 2008 22:44:00 -0700 From: Rudy <crapsh@monkeybrains.net> To: Derek Ragona <derek@computinginnovations.com> Cc: freebsd-questions@freebsd.org, prad <prad@towardsfreedom.com> Subject: Re: first pre-emptive raid Message-ID: <48672120.8040909@monkeybrains.net> In-Reply-To: <6.0.0.22.2.20080628130824.025fb008@mail.computinginnovations.com> References: <20080628005702.2137bb8c@gom.home> <6.0.0.22.2.20080628130824.025fb008@mail.computinginnovations.com>
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Derek Ragona wrote: > Mirroring offers redundancy but uses twice the disk space, AND is slower > than striping. Actually, disk Reads of a stripe and a mirror are the same. Writes are same speed as a single disk (half the speed of a two disk stripe). If you use something like gmirror and set the algorithm to 'round robin' reads are done from both disks.... if you access a 2MB file, 1MB is read from disk0 and the other MB from disk1. Rudy
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