Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!olivea!uunet!orca!javelin.es.com!blgardne From: blgardne@javelin.es.com (Blaine Gardner) Newsgroups: comp.sys.amiga.hardware Subject: Re: A3000 Harddrive Update Message-ID: <1991Mar26.182253.16114@javelin.es.com> Date: 26 Mar 91 18:22:53 GMT References: <48804@nigel.ee.udel.edu> Reply-To: blgardne@javelin.sim.es.com Organization: Evans & Sutherland Computer Corporation Lines: 53 lou@vaxsc writes: >In article <1991Mar25.170704.6504@javelin.es.com>, Blaine Gardner > writes: >>One internal Quantum 170S, terminated. No termination on the >>motherboard. Three CDC Wren III's in their own cases with power, all >>daisy chained from the A3000's external DB-25 SCSI connector, >This may or may not be helpful, but I've noted that no one seems to be asking >or mentioning this fact. (I could be wrong, I may have just missed it). >Here, Blaine specifies that his drives are external drives. So I'm assuming >that they are set up as >Internal - Lun 0, Unit 0 >External - Lun 1, Unit 0, > Lun 2, Unit 0, > Lun 3, Unit 0. >Hence, the LUN changes, but they are ALL unit 0. Is this the common config, >or is someone else trying to use LUN 0, Units 0 and 1? >I mention this because I have dealt with other types (non-Amiga) of SCSI >controllers that DO have problems with multiple units on the same LUN, but >DO NOT have problems with Multiple LUNS, all using unit 0. I think you've got your SCSI ID (Unit) numbers and LUN numbers mixed up. All drives are LUN 0, with ID numbers 0-6. The only way to get multiple LUNs is if you've got something like an Adaptec ST-506->SCSI adaptor that would occupy one SCSI address ID number, and provide two LUN numbers for the ST-506 drives. I doubt SCSI ID is a problem anyway, as I've changed things around with no problem. Originally my setup was: Internal Quantum Unit 6 LUN 0 (All drives) External Wren #1 Unit 0 External Wren #2 Unit 2 External Wren #3 Unit 3 Now it's setup as: Internal Quantum Unit 0 External Wren #1 Unit 1 External Wren #2 Unit 2 External Wren #3 Unit 3 Plus I've run a number of other drives and tape devices at anything from SCSI ID 0 through ID 6 without any problems. -- Blaine Gardner @ Evans & Sutherland 580 Arapeen Drive, SLC, Utah 84108 blgardne@javelin.sim.es.com or ...dsd.es.com!javelin!blgardne DoD #0046 My other motorcycle is a Quadracer. BIX: blaine_g 289 miles to go....