> > R.Alexander wrote:
> >RPI is PLANNING the following:
> >We will share an R24 with 1GB of mainstore with batch processing
> >and student access.  The R24 has two microchannels; we will have
> >a 3494 with 3 3590 drives attached through two differential F/W SCSI
> >cards, one to each micro channel.
>
> What is the planned disk configuration? Do you expect the disk system
> to be able to sustain a band width of near the 9MB/sec rated speed of
> the 3590 drives. With 3 3590 drives transferring simultaneously, that
> would be 27MB/sec peak.
>
> On the software side, do you expect ADSM to be able to drive the tape
> drives at anywhere near their rated speed, even if the hardware can
> support that speed?
>
The s/370 channel adapter can only support 4.5Mb/sec. SCSI attachment is
probably faster.

> I am asking because it isn't clear to me that the high bandwidth
> rating of the 3590's is of much value unless the total system
> can sustain that bandwidth. Does anyone have any experience or opinions

> >I would be interested in other configurations of ADSM/RS6K.

We have an RS/6000-990 with 50 2Gb serial disks, 2x 3995 (SCSI) and a 3494
(channel attached).

> >Richard Alexander

>Rob Creecy

Roy Jaques