On Wed, 21 Mar 2001, Manuel Bouyer wrote:

# On Wed, Mar 21, 2001 at 01:02:12PM +0100, wojtek@wojtek.from.pl wrote:
# > >    >
# > >    > Interesting. Could you try to just remove the PDC_IS_265 here:
# > >
# > > Thanks.  This change works well.  My drives are working as
# > > UDMA 5 now regarding to boot-time messages, though I have no
# > > way to check the actual speed.
# >
# > dd if=/dev/rwd0d bs=64k count=16384 of=/dev/null
# >
# > and you will see how much seconds is needed to read 1GB of data.
#
# No, with this you'll get the speed of the medium, not the speed of
# bus. You can see a difference between Ultra/33 and Ultra/66 but not
# Ultra/66 and Ultra/100; drives aren't fast enouth yet.

I will beg to differ on this point.

wd0 at pciide0 channel 0 drive 0: <Maxtor 51536H2>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 14655 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 30015216 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd1 at pciide0 channel 0 drive 1: <WDC WD102BA>
wd1: drive supports 16-sector PIO transfers, LBA addressing
wd1: 9779 MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 20028960 sectors
wd1: 32-bit data port
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4 (Ultra/66)
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA
data transfers)
wd1(pciide0:0:1): using PIO mode 4, Ultra-DMA mode 4 (Ultra/66) (using DMA
data transfers)

starjumper 501# dd if=/dev/rwd0d bs=64k count=16384 of=/dev/null
16384+0 records in
16384+0 records out
1073741824 bytes transferred in 32 secs (33554432 bytes/sec)
starjumper 502# dd if=/dev/rwd1d bs=64k count=16384 of=/dev/null
16384+0 records in
16384+0 records out
1073741824 bytes transferred in 47 secs (22845570 bytes/sec)
starjumper 503#

They sure look different to me!

# --
# Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
# --

				--*greywolf;
--
*BSD: May the Source be with you.