[SunRescue] Re: LVD drive on SCSI-2

[Chris Powell]

On Mon, 22 May 2000 05:35:32 -0400, Mike Nicewonger wrote:

> Unless that is one of the Multi-mode drives, i.e. SE or LVD it will not
> work.
> 
> The Sparc Stations use SE (single-ended) SCSI, where that drive is LVD (low
> voltage differential) SCSI. If you are lucky you have not let the magic
> smoke out of the drive or the controllers. You run a high risk of destroying
> the electronics on the drive or the controller by mixing SE with
> differential.

The LVD standard is far funkier than just being differential. Proper
LVD drives should sense if the bus is SE or differential, 8-bit or
16-bit and work accordingly. Really rather impressive!

Still, it doesn't explain why my drive doesn't work.


Chris.

> ----- Original Message -----
> From: Chris Powell <Chris_Powell at mitel.com>
> To: <rescue at sunhelp.org>
> Sent: Monday, May 22, 2000 4:54 AM
> Subject: [SunRescue] LVD drive on SCSI-2
> 
> 
> >
> > Hi All,
> >
> > I'm trying to get an IBM DRVS-09V 9.1G LVD SCSI drive working on a Sun
> > SPARCstation. The drive connector is a 68-way micro-D, and I'm using
> > a 68-way to 50-way IDC converter to put the drive in a 411 box. I'm
> > then connecting the 411 to the SCSI-2 connector of the base unit. I've
> > tried both a SPARCstation 5 and 10. Neither the PROM probe-scsi command
> > or UNIX see the drive. The drive does spin-up on power-up (not tried
> > removing the jumper to spin-up on SCSI command).
> >
> > I have tried jumpering the drive to turn off single-ended and wide
> > negotiations, still nothing.
> >
> > Am I doing something wrong here? My understanding is that LVD should work
> > on a SCSI-2 bus.
> >
> > Thanks.
> >
> >
> > Chris.