Date: Thu, 31 Jul 2003 17:45:23 +0200 (CEST) From: Soeren Schmidt <sos@spider.deepcore.dk> To: Kenneth Culver <culverk@yumyumyum.org> Cc: Buckie <freebsd1@centrum.cz> Subject: Re: Ultra ATA card doesn't seem to provide Ultra speeds. Message-ID: <200307311545.h6VFjOTp098979@spider.deepcore.dk> In-Reply-To: <20030731110954.J85113@alpha.yumyumyum.org>
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It seems Kenneth Culver wrote:
> >
> Guess I just didn't look hard enough or in the right place. I only spent a
> minute or 2 on it, but yeah ATA drives don't tell you that sort of thing,
> they say stuff like "ATA133 for a max transfer rate of 133 MB/sec *" then
> at the bottom the * says something like "133 MB/sec burst rate from drive
> to controller" or something similar. But I did try fairly hard to find
> specs on our Seagate drives and couldn't find a hard number that told what
> the maximum read and write speeds were.
Thats maybe true for some drives, but generally they state this info
in their docs, for the Diamond 9+ it took me < 10 secs to find the
below transfer speeds, I did have the PDF handy though :)
Disk to Read Once a 236Mb/sec 236Mb/sec 236Mb/sec 236Mb/sec
Revolution mminimum minimum minimum minimum
433Mb/sec 433Mb/sec 433Mb/sec 433Mb/sec
maximum maximum maximum maximum
Disk to Read 257Mb/sec 257Mb/sec 257Mb/sec 257Mb/sec
Instantaneously minimum minimum minimum minimum
472Mb/sec 472Mb/sec 472Mb/sec 472Mb/sec
maximum maximum maximum maximum
-Søren
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