> From: osymh@gemini.oscs.montana.edu (Michael L. Hitch)
> 
> On Apr 24, 12:50pm, Arthur Hoffmann wrote:
> > > I'm seeing poor disk performance under NetBSD-current on my A3000.
> > > Under ADOS, I see about 1.7-2.0 megabytes per second (via sysinfo)
> > > while under NetBSD, I see about 500 kilobytes per second
> > > (dd if=/dev/zero of=zzzzz bs=1024k count=10).
> > > 
> > > What disk performance numbers are others seeing?
> > > 
> > > Thanks,
> > > -SR
> > > 
> > 
> > Under Ados I get 3.1M/sec (Quantum Empire 2.1G) under NetBSD I get :
> > 
> > root@atze(306)$ dd if=/dev/zero of=zzzzz bs=1024k count=10
> > 10+0 records in
> > 10+0 records out
> > 10485760 bytes transferred in 23 secs (455902 bytes/sec)
> >  :(
> 
>   A question for both Stephen and Arthur - what is the rotational
> delay between contiguous blocks for your file system?  I tried dd
> on an older partition (and a slower disk) and got 455902 bytes/sec.
> After using tunefs to set the rotational delay to 0, I got 1048576
> bytes/sec.  [The old default for newfs was 4ms for the rotational
> delay - which is not a good default for current SCSI drives.]

Set to 4ms. I'll try setting to 0 and retesting.