v097pba8@ubvmsd.cc.buffalo.edu (Ken F Morton) (05/04/91)
Is it possible to share a SCSI Hard drive between a Mac and an Apple IIgs with a SCSI card? Thanks, Ken Morton "A vacant engineer rides on a v097pba8@ubvms.Bitnet train of thought that will not v097pba8@ubvmsd.cc.buffalo.edu lead him home" - Edie Brickell
peirce@outpost.UUCP (Michael Peirce) (05/04/91)
In article <74780@eerie.acsu.Buffalo.EDU>, v097pba8@ubvmsd.cc.buffalo.edu (Ken F Morton) writes: > > Is it possible to share a SCSI Hard drive between a Mac and an Apple > IIgs with a SCSI card? Nope, it doesn't work. -- michael -- Michael Peirce -- outpost!peirce@claris.com -- Peirce Software -- Suite 301, 719 Hibiscus Place -- Macintosh Programming -- San Jose, California 95117 -- & Consulting -- (408) 244-6554, AppleLink: PEIRCE
swanson@CS.Cornell.EDU (Randall A. Swanson) (05/05/91)
In article <0B01FFFB.eo5jp9@outpost.UUCP> peirce@outpost.UUCP (Michael Peirce) writes: > >In article <74780@eerie.acsu.Buffalo.EDU>, v097pba8@ubvmsd.cc.buffalo.edu (Ken F Morton) writes: >> >> Is it possible to share a SCSI Hard drive between a Mac and an Apple >> IIgs with a SCSI card? > >Nope, it doesn't work. > >-- michael Actually it works very nicely. On the Apple II SCSI card you can set the ID# of the CPU. So all you need to do is set the SCSI ID# on the HD and IIgs to something different than 7 <that of the Mac> and partition the hard drive. with the first physical partion being a ProDos partion and the other a Mac partion. I did this for over a year when I had a BBS running on a IIgs and did work on my Mac. The software I used to partion the drive was SilverLining. Randall Swanson 121 Baker Tower Cornell University Ithaca, NY 14853-5102
peirce@outpost.UUCP (Michael Peirce) (05/05/91)
In article <1991May5.011353.878@cs.cornell.edu>, swanson@CS.Cornell.EDU (Randall A. Swanson) writes: > In article <0B01FFFB.eo5jp9@outpost.UUCP> peirce@outpost.UUCP (Michael Peirce) writes: > > > >In article <74780@eerie.acsu.Buffalo.EDU>, v097pba8@ubvmsd.cc.buffalo.edu (Ken F Morton) writes: > >> > >> Is it possible to share a SCSI Hard drive between a Mac and an Apple > >> IIgs with a SCSI card? > > > >Nope, it doesn't work. > > > >-- michael > > Actually it works very nicely. On the Apple II SCSI card you can set the ID# > of the CPU. So all you need to do is set the SCSI ID# on the HD and IIgs > to something different than 7 <that of the Mac> and partition the hard drive. > with the first physical partion being a ProDos partion and the other a Mac > partion. Humm, interesting. Well, it doesn't work with two Macs. I leapt to the conclusion that the gs did SCSI similar to the way Macs do it. -- michael -- Michael Peirce -- outpost!peirce@claris.com -- Peirce Software -- Suite 301, 719 Hibiscus Place -- Macintosh Programming -- San Jose, California 95117 -- & Consulting -- (408) 244-6554, AppleLink: PEIRCE
kaufman@neon.Stanford.EDU (Marc T. Kaufman) (05/05/91)
In article <0B01FFFB.erxw5i@outpost.UUCP> peirce@outpost.UUCP (Michael Peirce) writes: >In article <1991May5.011353.878@cs.cornell.edu>, swanson@CS.Cornell.EDU (Randall A. Swanson) writes: -> >> Is it possible to share a SCSI Hard drive between a Mac and an Apple -> >> IIgs with a SCSI card? -> >Nope, it doesn't work. -> Actually it works very nicely. On the Apple II SCSI card you can set the ID# -> of the CPU. So all you need to do is set the SCSI ID# on the HD and IIgs -> to something different than 7 <that of the Mac> and partition the hard drive. -> with the first physical partion being a ProDos partion and the other a Mac -> partion. >Humm, interesting. Well, it doesn't work with two Macs. I leapt to >the conclusion that the gs did SCSI similar to the way Macs do it. The difference is that both Macs want to access the SAME partition, and you can't let both control the volume directory at the same time. In the Mac vs. IIgs case, they are working in DIFFERENT partitions, and each can control its own directory. Marc Kaufman (kaufman@Neon.stanford.edu)
bell@apple.com (Mike Bell) (05/06/91)
In article <1991May5.162802.4896@neon.Stanford.EDU>, kaufman@neon.Stanford.EDU (Marc T. Kaufman) writes: > Path: apple!decwrl!stanford.edu!neon.Stanford.EDU!kaufman > From: kaufman@neon.Stanford.EDU (Marc T. Kaufman) > Newsgroups: comp.sys.mac.misc > Subject: Re: Sharing a SCSI HD > Message-ID: <1991May5.162802.4896@neon.Stanford.EDU> > Date: 5 May 91 16:28:02 GMT > References: <0B01FFFB.erxw5i@outpost.UUCP> > Organization: Computer Science Department, Stanford University, Ca , USA > Lines: 24 > > In article <0B01FFFB.erxw5i@outpost.UUCP> peirce@outpost.UUCP (Michael Peirce) writes: > > >In article <1991May5.011353.878@cs.cornell.edu>, swanson@CS.Cornell.EDU (Randall A. Swanson) writes: > > -> >> Is it possible to share a SCSI Hard drive between a Mac and an Apple > -> >> IIgs with a SCSI card? > > -> >Nope, it doesn't work. > > -> Actually it works very nicely. On the Apple II SCSI card you can set the ID# > -> of the CPU. So all you need to do is set the SCSI ID# on the HD and IIgs > -> to something different than 7 <that of the Mac> and partition the hard drive. > -> with the first physical partion being a ProDos partion and the other a Mac > -> partion. > > >Humm, interesting. Well, it doesn't work with two Macs. I leapt to > >the conclusion that the gs did SCSI similar to the way Macs do it. > > The difference is that both Macs want to access the SAME partition, and you > can't let both control the volume directory at the same time. In the Mac vs. > IIgs case, they are working in DIFFERENT partitions, and each can control > its own directory. > > Marc Kaufman (kaufman@Neon.stanford.edu) Actually, the real problem is that the Mac has it's SCSI address fixed at 7. So, if you put two Macs on the same SCSI bus, there is an address conflict..... Mike Bell
amichiel@rodan.acs.syr.edu (Allen J Michielsen) (05/06/91)
In article <52475@apple.Apple.COM> bell@apple.com (Mike Bell) writes: ---everybody else write something like--- >> -> >> Is it possible to share a SCSI Hard drive between a Mac and a IIgs >> -> >Nope, it doesn't work. >> -> Actually it works very nicely. >> >Humm, interesting. Well, it doesn't work with two Macs. > Actually, the problem is that the Mac has it's SCSI address fixed at 7. >So, if you put two Macs on the same SCSI bus, there is an address conflict. It should be possible and fairly easy to change the scsi address of a mac, but it will require something approaching hacking the motherboard. I haven't done it, or seriously considered it. I'm really sending this to shorten the amount of quoted text for more followups.... al -- Al. Michielsen, Mechanical & Aerospace Engineering, Syracuse University InterNet: amichiel@rodan.acs.syr.edu amichiel@sunrise.acs.syr.edu Bitnet: AMICHIEL@SUNRISE
kaufman@neon.Stanford.EDU (Marc T. Kaufman) (05/06/91)
In article <52475@apple.Apple.COM> bell@apple.com (Mike Bell) writes: -> Actually, the real problem is that the Mac has it's SCSI address fixed at 7. >So, if you put two Macs on the same SCSI bus, there is an address conflict..... On the contrary. In later versions of the MacOS, the host SCSI address is kept in low memory (true, it is initialized to 7), but is not hard-wired into the code. Marc Kaufman (kaufman@Neon.stanford.edu)
mike@maths.tcd.ie (MIKE ROGERS) (05/07/91)
In article <1991May5.162802.4896@neon.Stanford.EDU>, kaufman@neon.Stanford.EDU (Marc T. Kaufman) wrote: >The difference is that both Macs want to access the SAME partition, and you >can't let both control the volume directory at the same time. In the Mac vs. >IIgs case, they are working in DIFFERENT partitions, and each can control >its own directory. Well, I have one 20SC and two Mac+s. Can I partition the drive into two 10MB segments and have each one use it? -- Mike Rogers,Box 6,Regent Hse,## We're dying from the moment we're conceived, TCD,EIRE. <mike@maths.tcd.ie>## Time wins, always. ###############################DON'T MISS TRINCON400 7th, 8th, 9th FEBRUARY 1992 what is pure, who is pure, is it european, I ain't sure.......................PE