🚀 go-pugleaf

In <4g8j60$6vr@taco.cc.ncsu.edu>, calindne@eos.ncsu.edu (Carl Albert Lindner) writes:
        <...>
>SCSI-3.  I have yet to determine what the transfer rate really is....if 
>you know of an easy way to find out let me know (email) and I'll give it 
>a shot. 

Check out the OS/2 disk benchmarking utility "diskio"; you can find it on
  ftp://hobbes.nmsu.edu/os2/diskutil/diskio19.zip

As a point of reference, on my P120 with a NCR fast-wide controller, 
DEC DSP3210S, and Seagate ST32430W (both drives only 5400 rpm) I
get:

 Disk 1: 66 sides, 1009 cylinders, 63 sectors per track = 2048 MB
 Drive cache/bus transfer rate: 6802 k/sec
 Data transfer rate on track 0   : 4727 k/sec
 Data transfer rate on track 1008: 2300 k/sec
 Concurrent CPU activity and disk transfers: 19% CPU usage for disk I/O
 Average latency time: 1.0 ms
 Average data access time: 16.2 ms

 Disk 2: 66 sides, 1009 cylinders, 63 sectors per track = 2048 MB
 Drive cache/bus transfer rate: 2838 k/sec
 Data transfer rate on track 0   : 5672 k/sec
 Data transfer rate on track 1008: 3204 k/sec
 Concurrent CPU activity and disk transfers: 14% CPU usage for disk I/O
 Average latency time: 1.3 ms
 Average data access time: 16.3 ms

Cheers,
Tom

-Tom      maki@acm.org     http://www.umn.edu/nlhome/g561/maki0019
"a good picture may well be worth a thousand words, but on the WWW,
even bad imagemaps cost tens of thousands of words."