Manuel Bouyer writes:
 > On Fri, Jan 11, 2002 at 11:26:30AM +0900, henry nelson wrote:
 > > On Thu, Jan 10, 2002 at 07:45:18PM +0100, Manuel Bouyer wrote:
 > > > Can you try the attached program ?
 > > > usage: /usr/bin/time ./tst /dev/rwd0d 1000
 > > > 
 > > > This measures the bandwidth between the disk cache and the host.
 > > 
 > > Neat! and Thanks.  Always wanted to time one of these old PC98's:
 > > 
 > > on PC9821Bf with WD AC31200
 > >        43.87 real         0.03 user         0.73 sys
 > > on PC9821Ne with IBM DPRA21215
 > >        31.17 real         0.09 user         2.24 sys
 > > on PC9801BA with Conner CP3544
 > >        41.97 real         0.10 user         1.79 sys
 > > 
 > > ..., but what does this tell me?
 > 
 > 64*1000/41.97=1524.8987 KB/s on the IDE bus (speed between disk and host,
 > excluding issues with reading data from platters).

I agree, Neat!

On my 486 PC running NetBSD 1.5.2 with ST34342A  (and only 20MB RAM):
       56.54 real         0.05 user         1.02 sys

That's 1132 KB/s--bad for a new system, but I'll take it for my
experiment platform.

-Ken Jackson