ATA anomaly Question

[Bill Hacker]

Matthew Dillon wrote:
:>>Fine with me - so long as it doesn't actually downshift I/O rate-wise.
:>>(which IIRC, the FreeBSD ones actually *did* do, at least early-on.
:>>Ancient history now...)
:> 
:> 
:> 	It certainly doesn't I've seen well over 40MB/s out of a SATA
:> drive with the limited to UDMA33 message.
:> 
:
:Sounds good! - Few single drives can sustain even that in 'real world'
:use- regardless of the interface. Burst-mode is, of course, another matter.
:
:Thanks,
:
:Bill
    
    35-50 MBytes/sec is fairly typical for a modern drive these days.  The
    linear transfer rate goes up with density.  The head seek times, on the
    otherhand, haven't changed much over the last few years.

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>
ACK.  Hence 'real world' comment.....

If you want to see astonishing I/O benchmarks, format a ZIP as hpfs-386.

Eject the media.

Run the I/O benchmark against the empty drive.....

Magic!

. ..absent media, the OS/2 version runs the bench against the 100 MB (-) 
cache ...

Which is in system DDRAM.....

Tilt!  ;-)

Bill