Date: Thu, 31 Jul 2003 21:26:47 +0400 From: Buckie <freebsd1@centrum.cz> To: freebsd-hackers@freebsd.org Subject: Re: Ultra ATA card doesn't seem to provide Ultra speeds. Message-ID: <1948347781.20030731212647@centrum.cz> In-Reply-To: <20030731125301.N85113@alpha.yumyumyum.org> References: <200307311545.h6VFjOTp098979@spider.deepcore.dk> <20030731125301.N85113@alpha.yumyumyum.org>
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Wow. But still, can it be that something bottlenecks somewhere so that I can't get these loverly speeds? Can I measure pci performance as well? Would be cool to understand what doesn't allow this system to use the 133 to its max... Z >> > 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 >> KC> OK you win :-P I just don't know where to look I guess. KC> Ken KC> _______________________________________________ KC> freebsd-hackers@freebsd.org mailing list KC> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers KC> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
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