Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!casbah.acns.nwu.edu!nucsrl!tellab5!laidbak!amiganet!austral!rrezaian From: rrezaian@austral.UUCP (Russell Rezaian) Newsgroups: comp.os.cpm Subject: Re: Help: Documentation, information, et cetera. Message-ID: Date: 2 Apr 91 17:20:35 GMT References: <9046@mentor.cc.purdue.edu> Organization: D.O.C. Data Processing Systems Lines: 42 In article <9046@mentor.cc.purdue.edu> wilker@gauss.math.purdue.edu (Clarence Wilkerson) writes: >Sorry, no experience with Zeus MP/M type stuff. >However, on the subject of disk drives, any St-506 >innerface drives I've used will cheerfully allow you to >use them at less than full capacity. So if the number of >logical heads is less than or equal to number of physical >head, and same for cylinders, almost any other >drive should replace the ones you have. For example, >Seagate ST251 's have 6 heads, and 820?? cylinders, and >are going new for about $250. Unfortunately, the cheaper >bargain drives such as ST225 only have four heads and would >not plug right in. > >If the drive controller is SCSI, then the operating system >may think it reading a certain track and sector, but actually >eventually asks for an absolute sector number, so if the >scsi controller has set the correct parameters the operating >system would not know what it has physically. > >Poke around under the hood and see what kind of hard disk >controller is there? >Clarence > > I did a little checking, the controller is labeld WD1000 (like how many othert hard drive controllers...) the cable connecting it to the system is NOT a standard SCSI, the interface might still use a similar protocol, but I doubt it. We do have the pretty common looking large brown cermic chip at the bottom, but it isn't labeled coherently, there are what looks like a couple o Western Digital PALs floating around, as well as a few other PALs. I have been able to substitute other drives, and that did work, sort of... The only problem s that is it painfull to end up using 15 megs of a 40 meg drive... I would sooner dissassemble the sysgen and re-engineer the bios than waste that much space... Thanks for your ideas though, I might end up doing that anyway... -- +-------------------------------+---------------------------------------+ | Russell Rezaian | amiganet.chi.il.us!austral!rrezaian | | P.O. Box 479 | | | Naperville, Il. 60566-0479 | "One is best punished for one's | | USA | Virtues." Nietzsche. | +-------------------------------+---------------------------------------+