Date: Wed, 12 Jan 2000 23:55:59 +0100 From: sthaug@nethelp.no To: grios@ddsecurity.com.br Cc: ohoyer@fbwi.fh-wilhelmshaven.de, freebsd-hardware@FreeBSD.ORG Subject: Re: hardware Message-ID: <72218.947717759@verdi.nethelp.no> In-Reply-To: Your message of "Wed, 12 Jan 2000 20:42:28 -0200" References: <387D0354.63159B8@ddsecurity.com.br>
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> So i cannot understand, take a closer look: > http://www.seagate.com/cda/products/discsales/marketing/detail/0,1121,43,00.shtml > > May anyone here explain me this ? As far as I can see, Seagate's specifications are somewhat conflicting, or at the very least unclear. I'm looking at the "Performance" table from http://www.seagate.com/cda/products/discsales/enterprise/tech/0,1131,43,00.shtml Yes, it says "External (I/O) Transfer Rate (max) 80 MBytes/sec" - but this is worthless since it obviously means transfer from the cache. The number which is interesting is *sustained* transfer rate, at the outer and inner part of the disk. (Compare with "Internal Transfer Rate (max) 264 Mbits/sec" - you'd need an internal transfer rate of more than 640 Mbits/s to get a sustained 80 MB/s from the outer part of the disk.) Even so, an *average* formatted transfer rate of 22.5 MB/s is rather good! Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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