Ultra ATA card doesn't seem to provide Ultra speeds.
Buckie
freebsd1 at centrum.cz
Thu Jul 31 10:26:57 PDT 2003
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
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