DragonFly users List (threaded) for 2005-03
Re: ATA anomaly Question
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.
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.
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.....
. ..absent media, the OS/2 version runs the bench against the 100 MB (-)
Which is in system DDRAM.....