Date: Sun, 9 Apr 2006 18:09:27 +1000 From: Peter Jeremy <peterjeremy@optushome.com.au> To: Scott Long <scottl@samsco.org> Cc: freebsd-stable@freebsd.org, "Chris H." <fbsd@1command.com> Subject: Re: Pros and Cons of amd64 (versus i386). Message-ID: <20060409080927.GC720@turion.vk2pj.dyndns.org> In-Reply-To: <44384EB8.8090803@samsco.org> References: <CBC0AAB4-EC80-44C8-BCCE-010DE99D4BC0@khera.org> <E1FRVcq-0004pJ-4c@dilbert.firstcallgroup.co.uk> <20060406192950.GE700@turion.vk2pj.dyndns.org> <20060408203233.K67402@woozle.rinet.ru> <20060408212421.GB720@turion.vk2pj.dyndns.org> <20060408160304.ek1xxodrkok4gw4g@webmail.1command.com> <44384EB8.8090803@samsco.org>
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On Sat, 2006-Apr-08 18:00:56 -0600, Scott Long wrote: >Modern disks (I don't know how to define a cutoff to this term, >unfortunately) I got my first ZBR (zone-block recording) Seagate SCSI disk at work about 20 years ago. I'm not sure when it became common. >other day. I'm still not clear on whether the drive starts recording >at the outer rim or the inner rim of the disk, and that could very well >different between manufacturers. Traditionaly hard disks have cylnder 0 at the outside. It's possible that some manufacturers may have swapped this. Note that CDs and DVD have block 0 at the inside and so the best I/O performance is usually at the end of the disk. > The only way to get a 'fair' comparison is to use >separate identical disks with identical partition layouts for each >of your OS installs. If disk I/O is an issue, maybe even newfs the partitions for each test. -- Peter Jeremy
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