cloos@batcomputer.tn.cornell.edu (James H. Cloos Jr.) (04/11/89)
Is is possible to set up a Mac hard drive so that it can boot either a Plus or a SE, depending on what it happens to be plugged into at the moment. I will be purchasing a HD soon, but for now will be using with macs at a couple of public sites here on campus. One site has plusses, the other SE's. I'd like to boot off the drive at each of the sites. I assume I'll have to have both SE specific and Plus specific versions of the SYStem on the disk, most likely in separate system folders. Partitioning the drive is an option. I expect to use either SuitcaseII or MasterJuggler, so fonts, da's, sounds can be kept in one location. Init's & cdev's would of course have to be in both folders, though. Any chance of getting this to work? Also, is it possible to create a 'hard link' in a HFS disk (a la UNIX)? Thanks for any info. -JimC -- James H. Cloos, Jr. "Entropy isn't what it used to be." jhc@Crnlvax5.BITNET --c/o Fortune @ batcomputer.UUCP jhc@Vax5.CCS.Cornell.ED #include <std_disclaimers.h> cornell!vax1!vax5.cit.cornell.edu!jhc@rochester.UUCP B-7 Upson Hall, Cornell Univ., Ithaca, NY 14853 +1 607 272 4519 Urgent mail to: cloos@TcGould.TN.Cornell.EDU cloos@CrnlThry.BITNET or: batcomputer!cloos@cornell.UUCP
earleh@eleazar.dartmouth.edu (Earle R. Horton) (04/12/89)
In article <7715@batcomputer.tn.cornell.edu> jhc@vax5.cit.cornell.edu (James H. Cloos Jr.) writes: >Is is possible to set up a Mac hard drive so that it can boot either a Plus >or a SE, depending on what it happens to be plugged into at the moment. Yes, you should have ONE generic system folder on the disk, bootable by either the SE or the Plus. I do this fairly frequently, although one machine is a Plus and the other a II. >I assume I'll have to have both SE specific and Plus specific versions of >the SYStem on the disk, most likely in separate system folders. This is possible, but it is not a very good idea. The only way to tell the Mac which one of the system folders is the boot one is to split up the System and Finder in the non-boot folder by putting one in another folder. I know people who do this, and they are forever booting from the wrong folder, rearranging files, rebooting, and making mistakes in the process. The generic system works fine on all Macs. >Also, is it possible to create a 'hard link' in a HFS disk (a la UNIX)? Doesn't appear to be. I don't think HFS supports that kind of thing yet. Earle R. Horton Graduate Student. Programmer. God to my cats.
wb1j+@andrew.cmu.edu (William M. Bumgarner) (04/12/89)
I usually do an install using the installer w/all three system types selected. I have never had a problem with the set up and have drive a plus, an SE, and a II from the same system folder on my hard drive... b.bum wb1j+@andrew.cmu.edu
MacUserLabs@cup.portal.com (Stephan - Somogyi) (04/13/89)
The differences in the installer scripts are mainly the different files that are put into a system folder. An SE doesn't need some of the cdev's that a II needs etc. Having said that, there is a quite reliable way to have multiple System Folders on the same hd. Apple does *not* recommend this, *nor* do I. As a friend of mine has been known to say, 'This technique is to be used by experienced software engineers only'; paraphrase this as appropriate. There's a nifty little tool named Blesser written by a guy at Apple whose name temporarily escaped me. This tool 'blesses' a given system folder so that it is the one used at boot time. It works and is in some cases indispensable. In the case described here, it is totally unnecessary. To assuage my conscience some more let me reiterate that multiple system folders on a single hd can cause *all sorts* of problems. Don't do it unless you absolutely have to. <- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -> Stephan Somogyi AppleLink: X1058 Software Engineer BIX: mulabs MacUser CIS: 72511,16 950 Tower Lane, 18th Floor GEnie, MacNET: MULABS Foster City, CA 94404 FAX: (415) 378-5675 ...sun!cup.portal.com!MacUserLabs or MacUserLabs@cup.portal.com If fun is outlawed, only outlaws will have fun. Any opinions expressed above are mine.
alexis@ccnysci.UUCP (Alexis Rosen) (04/15/89)
In article <7715@batcomputer.tn.cornell.edu> jhc@vax5.cit.cornell.edu (James H. Cloos Jr.) writes: >I will be purchasing a HD soon, but for now will be using with macs at a >couple of public sites here on campus. One site has plusses, the other >SE's. I'd like to boot off the drive at each of the sites. > >I assume I'll have to have both SE specific and Plus specific versions of >the SYStem on the disk, most likely in separate system folders. Don't waste your time. This is really a lot simpler than you think. Any normal SCSI HD will boot off of any SCSI-capable mac. Just make sure you interleave it for a Mac Plus (usually == "use Mac Plus drivers" for most installers) unless it has a built-in cache (most drives >=80 MBytes, except the Seagate). If you don't do this, it should still run, but it could be as slow as a floppy on a Mac Plus (though the SE would be a bit faster). *DON'T* mess with multiple systems! Just install the "Regular SE System" (or whatever Apple calls it) with Apple's standard installer program. It will work with the plus as well. --- Alexis Rosen alexis@ccnysci.{uucp,bitnet} alexis@rascal.ics.utexas.edu (last resort)
cloos@batcomputer.tn.cornell.edu (James H. Cloos Jr.) (04/16/89)
Thanks for all of the replies to my query re: making a HD bootable from both SE's & Pluses. I guess I must have remembered reading that the *minimum* sripts created machine specific Systems, and forgotten that this was specific to the minimum scripts. Sure makes that problem trivial. The only other thing to consider is that the interleave not be 1:1, unless the disk has a catche, as the one(s) I'm looking at do, so even that sholdn't be a problem. I had also asked for comparisons of SuitcaseII vs. Master Juggler. One responce (*the* one) suggested to keep in mind that SuitcaseII is 40K and that MasterJuggler is (appearently) significantly larger. There were many replies, and a few followups too. I hope that all of the thank you notes I sent made it; none have bounced back (yet). -JimC -- James H. Cloos, Jr. "Entropy isn't what it used to be." jhc@Crnlvax5.BITNET --c/o Fortune @ batcomputer.UUCP jhc@Vax5.CCS.Cornell.ED #include <std_disclaimers.h> cornell!vax1!vax5.cit.cornell.edu!jhc@rochester.UUCP B-7 Upson Hall, Cornell Univ., Ithaca, NY 14853 +1 607 272 4519 Urgent mail to: cloos@TcGould.TN.Cornell.EDU cloos@CrnlThry.BITNET or: batcomputer!cloos@cornell.UUCP