spf@bonnie.ATT.COM (11/11/86)
I also use a DOS boot floppy. But its AUTOEXEC.BAT should point to drive C:, not D:, since DOS will look at what YOU call drive C:, decide there's no DOS partition, then look at the next drive (which YOU call drive D:), and call it C:. Got it? The bottom line is that DOS doesn't acknowledge (or assign letters to) drives which lack DOS partitions. So it ignores the drive with XENIX on it, and labels the NEXT one C:. Steve *** My songs are merely dreams visiting my mind. -- Donovan
howardl@tekline.UUCP (Howard D. Leadmon) (11/11/86)
Hello, What you say about creating a small partition on the C: drive with one exception. What happens when you turn on the machine ?? It certainly can't boot both OS's at the same time (can it). If you look at it logically it makes sense that only one OS can have the boot tracks (track 0) on the drive. Also IBM-XENIX (I believe this goes for the others as well) must have control of the boot blocks on drive C:, there for you can not install the DOS boot tracks as well. I have set up several systems in which both DOS and XENIX reside on drive C:, and there is no problem with that, all you have to do is boot from a floppy when you want to use the dos partition of the drive. Example: c: c:\ autoexec.bat If you put this in your autoexec on the DOS floppy, this will automatically change to the DOS partition on the C: drive, and run the autoexec.bat file that is on that drive. Be sure to install where you are keeping to OS commands on the C: drive in the autoexec.bat file (ie: C:\DOS). I hope this helps clear up this issue... -- Sincearley, Howard D. Leadmon Fast Computer Services PATH: ..cp1!tekline!howardl
ben@catnip.UUCP (Bennett Broder) (11/13/86)
In article <134@tekline.UUCP> howardl@tekline.UUCP (Howard D. Leadmon) writes: >In article <69@reality1.UUCP>, james@reality1.UUCP (james) writes: >> Is it possible to boot Xenix or Microport's unix from a second hard disk? >> Is there a way of doing this by running a boot program under DOS, or >> booting the computer from a floppy disk (which then boots xenix/unix from D:)? >> -- >> James R. Van Artsdalen ...!ut-ngp!utastro!osi3b2!james > > There may be a way to do this with XENIX, but I don't think so (I wouldn't >bet any money on it). What I have done for my customers that want to run both >(MS)PC/DOS is to set the machine up so that it boots XENIX as the default, then >I make a floppy that they can put in drive A: when they want to boot DOS. Below >is an example of what I would do. > > 1. First load XENIX (UNIX) on drive C: > 2. Format and load DOS on drive D: > 3. Format a floppy disk with system and install the following > AUTOEXEC.BAT file on the floppy disk (ie: DOS commands will be > located in D:\DOS) Another solution, if you don't care for floppies, is to put a tiny little DOS partition on drive 0 (C:)(The Xenix drive). Make Xenix the active partition. Then, to boot Xenix, just power up as usual. To run Dos, type 'dos' at the Xenix boot prompt. (A feature of 2.1.3 Xenix from SCO, I am not sure whether IBM Xenix has it). The little partition should have an autoexec that switches to the main Dos drive (D:). -- Ben Broder {ihnp4,decvax} !hjuxa!catnip!ben {houxm,topaz}/
dan@prairie.UUCP (Daniel M. Frank) (11/15/86)
The info-ibmpc archive has a program which, run from DOS, installs
a new boot block on your hard disk that selects which operating system
you want to boot based on your typing D for DOS, or X for Xenix. Very
useful.
--
Dan Frank
uucp: ... uwvax!prairie!dan
arpa: dan%caseus@spool.wisc.edutmangan@infinet.UUCP (Tim Mangan) (11/18/86)
In article <136@tekline.UUCP> howardl@tekline.UUCP (Howard D. Leadmon) writes: >exception. What happens when you turn on the machine ?? It certainly >can't boot both OS's at the same time (can it). If you look at it logically >it makes sense that only one OS can have the boot tracks (track 0) on the >drive. Also IBM-XENIX (I believe this goes for the others as well) must >have control of the boot blocks on drive C:, there for you can not install >the DOS boot tracks as well. I have set up several systems in which both >DOS and XENIX reside on drive C:, and there is no problem with that, all >you have to do is boot from a floppy when you want to use the dos partition >of the drive. Yes, you can do that. However, perhaps you can do something without the floppy. We have put QNX on one C: partition and DOS on another C: partition. Then we use the 'fdisk' utility (which fortunetly lives on both OS's) to select the partition to use for booting. Granted, I know nothing of XENIX, or why this works for that matter... -- -------------------------------------------------------------------------------- FROM: Timothy R. Mangan Warning: Bugs are multiplying! PHONE: 1-617-681-0600 Bugs are multiplying! UUCP: decvax!wanginst!infinet!tmangan Call a cop! --------------------------------------------------------------------------------