On Tue, 3 Jun 1997 11:17:00 -0400, "Davidson, Brian" <[log in to unmask]> wrote: >This is a follow-up to my question of does anyone have non-HP FW SCSI >drives on a 3k. What models and how are they configured? Thanks to >those on the list who have helped. > >I paid HP to come and trouble-shoot. At first they weren't a lot of >help since my drives are not HP drives. They did it mainly to prove >that their controller card was OK. However, I checked the FWD >controller card (28696A) and it is differential. The fact that these >drives are not differential leads me to believe that is why they cannot >be seen on this controller card. I don't think that configuration or >distant has anything to do with it. You may want differential drive >when you plan on long SCSI distances. However, I think that >non-differential drives cannot be seen by the controller card. HP >brought a FWD drive and it worked fine. It was recognized instantly by >MAPPER. > >What threw me off is the fact that SEAGATE has both ST34371W and >ST34371WD model numbers. They also have -WC and -DC drive suffixes. >IODFAULT lists the drive without the D. In the single-ended SCSI world, >I don't think that differential drives comes into play. In the >Fast-Wide SCSI world on the HP3000 I think differential drives are >required. I am working with the SEAGATE vendor to trade the ST34371W >drives for ST34371WD drives. I will see what happens when the new >drives arrive. >> ---------- >>From: [log in to unmask] >>To: Davidson, Brian >>Subject: Re: SEAGATE drives on HP3000 >>Date: Friday, May 30, 1997 5:40PM >> >>>Yes to the monthly fax. I'll handle it. What is a >>differential >>drive? A differential drive will operate up to 65 feet from the >>host, >>but requires a differential controller also. A plain single-ended >drive >>must be within 20 feet of the host, counting all cabling inside and >>outside >>of any enclosures. Is it a >>>ST34371WD model? Yes, that is the differential model and they work >>wonderfully on the 9000s. Cabling is all within specs - one 3 m >>cable >>from FW >>>SCSI card to HP6000 disk rack mount. Drives are within that rack >>>mounting arrangement. >> >>>>Brian Davidson >>>>U.S. Army, Falls Church, VA >>>>Tel: (703) 681-9781 DSN 761-9781 >>>>Fax: (703) 681-9304 DSN 761-9304 >>>>Email: [log in to unmask] You are wasting your time. The "seagate" seagate drives don't have the HP firmware on them. The system will recognize them at the hardware level (ODE/MAPPER), but MPE won't recognize them. Seagate will only sell the "special" drives to HP. I am sending you a related, private email on an alternative product that *DOES* work, and will be on the market soon.