404 lines
16 KiB
Plaintext
404 lines
16 KiB
Plaintext
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The Linux ``Linux-DOS-Win95-OS2'' mini-HOWTO
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Mike Harlan, r3mdh@raex.com
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v1.3.1, 11 November 1997
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This document presents a procedure to make 4 operating systems co-
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exist on a single hard disk.
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______________________________________________________________________
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Table of Contents
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1. Introduction
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2. The Procedure
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______________________________________________________________________
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Disclaimer:
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Any damages inflicted on any machine by you as a result of your
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reading of this HOWTO is still YOUR FAULT. When you read about
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deleting partitions and formatting disks, be smart. Realize
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that doing any of the above will result in loss of data. So,
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BACKUP SOON, BACKUP OFTEN. This is your second-to-the-last
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warning.
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Stuff to make the lawyers happy:
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Unless otherwise stated, Linux HOWTO documents are copyrighted
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by their respective authors. Linux HOWTO documents may be
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reproduced and distributed in whole or in part, in any medium
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physical or electronic, as long as this copyright notice is
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retained on all copies. Commercial redistribution is allowed
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and encouraged; however, the author would like to be notified of
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any such distributions.
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All translations, derivative works, or aggregate works
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incorporating Linux HOWTO documents must be covered under this
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copyright notice. That is, you may not produce a derivative
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work from a HOWTO and impose additional restrictions on its
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distribution. Exceptions to these rules may be granted under
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certain conditions; please contact the Linux HOWTO coordinator
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at the address given below.
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In short, we wish to promote dissemination of this information
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through as many channels as possible. However, we do wish to
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retain copyright on the HOWTO documents, and would like to be
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notified of any plans to redistribute the HOWTOs.
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If you have any questions, please contact Tim Bynum, the Linux
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HOWTO coordinator, at linux-howto@sunsite.unc.edu via email.
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Updates from v1.3:
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<20> Updated my e-mail address. My address has changed from
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r3mdh@imperium.net to r3mdh@raex.com.
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Updates from v1.0:
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<20> Updated my e-mail address. My address has changed from
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r3mdh@dax.cc.uakron.edu to r3mdh@imperium.net.
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Now...........on with the show!
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1. Introduction
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After many days of struggle and frustration, I finally figured out how
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to accomplish what I wanted. I have a 1.2GB HD and 16MB RAM PC. I
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wanted to have 4 operating systems on my system: MSDOS v6.22, Windows
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95, OS/2, and Linux. Until now, I have found no Linux HOWTO to
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perform the task of getting each and every one of these operating
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systems on one machine and still have the ability to boot each (it is
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possible to write the OSs to different partitions, but getting them to
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boot and not hang at the ``Starting MSDOS'' message, for example, is
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something that I had to figure out. Well, after much trial and error,
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I have come up with the following recipe to perform this feat:
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Before I begin going through the procedure step-by-step, let me first
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clue you in on what I eventually wish to accomplish:
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<NAME> <SIZE> <LABEL> <PARTITION NUMBER>
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---------------------------------------------------------------------
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MSDOS v6.22 11MB P1 Primary Partition 1
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---------------------------------------------------------------------
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Windows '95 350MB P2 Primary Partition 2
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---------------------------------------------------------------------
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OS/2 Boot Manager 2MB P3 Primary Partition 3
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---------------------------------------------------------------------
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DOS/Win Data 511MB E1 Primary Partition 4
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OS/2 Warp 3.0 127MB E2 Extended into 4 logical
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Linux Slakware 3.2 Swap XMB E3 drives (sub-partitions)
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Linux Slakware 3.2 Native 219-XMB E4 labeled E1-E4
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---------------------------------------------------------------------
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What does all of this mean? Well, let me talk you through it. First,
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we need to use up all 4 partitions on our 1 harddrive. Partitions 1
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through 3 are PRIMARY partitions. We will store MSDOS, Win95 and the
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OS/2 Boot Manager (which inefficiently requires its OWN partition) on
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these partitions, respectively. We then have 1 partition left. But,
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we want to have a drive just for DOS/Win95 data (this gives us a large
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place to dump all of those ZIP files we so often download from the
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Internet as well as a place to store Win95 programs and data that we
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don't have enough room for on the Win95 partition), OS/2, and Linux
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(both a Linux native as well as Linux swap partition).
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Now, I've been getting a lot of grief through e-mail lately about why
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I have a separate partition for Win95 and one for DOS and one for
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Win95/DOS data. Here's my answer: having separate Win95 and DOS
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partitions isn't for everyone. Perhaps you don't even use DOS
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anymore. Perhaps Windows '95 is your answer for any software written
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for a Microsoft platform. Well, there are some people out there who
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still use DOS and can't live without it. Whether it's because DOS can
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run 16-bit applications faster and more efficient, or because the
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certain DOS program that you may use won't run under a Windows
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environment (the Gravis Ultrasound soundcard setup program comes to
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mind), you simply MUST be able to boot into DOS from time to time.
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This HOWTO was written with those people in mind. If you still have
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difficulty swallowing the fact that the word ``MSDOS'' is included in
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this HOWTO, then feel free to sit down and write a Linux-
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Win95-OS/2-only HOWTO. :)
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Now, back to the diagram above. Like I said, we have 1 partition to
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cram 4 things onto: DOS/Win data, OS/2, and Linux native & swap. This
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can be done by creating what are called logical drives (or logical
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partitions, depending on which book you read) within the 1 primary
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partition. When we create these logical drives within a primary
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partition, we refer to this primary partition as an EXTENDED PARTITION
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(because it is extended beyond the scope of a single, primary
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partition and instead contains up to 3 subpartitions (logical
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drives)). Confused? If so, you might want to read the OS/2 manual
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about this topic. It will explain it better than I have here.
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Now, you might be scratching your head saying ``he wants to cram 4
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things onto that extended partition, but he just got done saying we
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can only have 3 subpartitions to put them on!'' This is true, at
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least in MS-DOS's and OS/2's reasoning. But, here one of the many
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powerful advantages to Linux comes to save the day. Linux can create
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more than 3 subpartitions on an extended drive. Just how many, I
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don't know. But, I know it can create at LEAST 4 (what we need). So,
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when we go through the steps of the installation procedure below, keep
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in mind that when we create partitions using an MSDOS or OS/2 program,
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we will only create 3 logical drives. Then, when we go to Linux, we
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will split one of them into two. Essentially, you can think of it as
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``tricking'' MSDOS and OS/2 into seeing only 3 logical drives, but in
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reality (and to Linux), there will be 4.
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2. The Procedure
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NOTE:
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Numbers in parentheses were the number of megabytes that I used
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on my 1.2GB harddrive.
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Now, let's move on to the step-by-step procedure:
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1. Run view.exe on the Linux Slakware CD and create the Linux Boot and
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Linux Root floppies. For some reason, the Linux bootstrap program
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calls the Root disk the Ramdisk floppy. I'll refer to this disk
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from now on as the Ramdisk (Root) floppy.
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2. Backup any information that you wish to keep to tape (or whatever
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media you have available to you).
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3. Boot your original MSDOS installation floppy, disk 1.
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4. When ``Starting MSDOS'' appears, press F5 to bypass config.sys and
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autoexec.bat.
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5. Run a:\fdisk.exe.
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6. Delete all partitions (you have been warned: DELETING / MODIFYING
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OF ANY PARTITION WILL RESULT IN THE LOSS OF ALL DATA ON THE DISK!).
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7. Add an MSDOS primary partition. (11MB)
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8. Format this partition.
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9. Run a:\setup.exe to install MSDOS on this partition.
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10.
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Boot OS/2.
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11.
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Select Advanced installation.
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12.
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Run FDISK. (this will eventually popup for you if you run through
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the OS/2 installation)
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13.
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Add 1 primary partition after the MSDOS one. This will become our
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Windows 95 partition. (349MB)
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14.
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Add the Boot Manager to the next primary partition. (2MB)
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15.
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Add an extended partition.
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16.
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Add a logical drive to the extended partition. This will become
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the data portion of our MSDOS system. (511MB)
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17.
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Add another logical drive to the extended partition. This will
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become our OS/2 HPFS (``High Performance File System'') partition.
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(127MB)
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18.
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Add 1 last logical drive to the extended partition using the
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remaining space on the drive. This will later become 2 partitions
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under Linux -- our swap partition and our native Linux partition.
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But, since OS/2 (and DOS as well) can only write up to 6 partitions
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per drive (3 primary and 3 logical drives housed within 1 extended
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partition), we have to create only one at this time. And we DO have
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to create this partition. Don't leave this as free space and
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expect Linux to be able to create the two partitions. Due to the
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way that OS/2's FDISK works, where you add your last logical drive
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to the extended partition marks the END of the extended partition.
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You cannot add partitions beyond this point. So, in other words,
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creating this one last logical drive serves as a space-filler for
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Linux. Later we will delete this partition and add 2 new ones in
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the space that it once took up.
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19.
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Add partitions 1, 2, and 5 to the Boot Manager.
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20.
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Make partition 5 installable.
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Your FDISK screen should now look like this (or something like
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this):
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______________________________________________________________________
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FDISK
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Disk 1
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___________________________________________________________________________
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Partition Information
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Name Status Access FS Type MBytes
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___________________________________________________________________________
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MSDOS Bootable C: Primary FAT 11
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WIN 95 Bootable : Primary FAT 350
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Startable : Primary BOOT MANAGER 2
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None D: Logical Unformatted 511
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OS/2 Installable E: Logical FAT 127
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None F: Logical Unformatted 219
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______________________________________________________________________
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21.
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Continue on with the OS/2 installation process.
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22.
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Reboot and select partition 2 (Windows 95) from the Boot Manager.
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23.
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When the missing operating system error pops up, boot your MSDOS
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installation disk. We selected this partition in order to ``hide''
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the MSDOS partition. OS/2's Boot Manager is a bit strange. For
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every bootable partition you have (in our case, MSDOS and OS/2),
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you can have only one of them visible at a time. What this means is
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that if you boot into one partition, MSDOS for example, the other
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partition (Win95) is invisible. The MSDOS partition and Win95
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essentially SHARE a drive letter. That's why under ``Access''
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above, MSDOS has drive letter C and Win95 has no drive letter.
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Under the current circumstances, MSDOS is visible with drive letter
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C and Win95 is invisible with no drive letter. If we were to boot
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Win95, the opposite would be true: MSDOS would be invisible with no
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drive letter and Win95 would be visible with drive letter C. An
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invisible drive cannot be accessed AT ALL. If you wish to copy
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files between two drives in which only one can be visible at one
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time, you must use a common (non-bootable) drive to swap files. In
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our case, the DOS/Win95 Data drive (drive D 511MB above) will serve
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as this common drive. You might be asking ``Won't we eventually be
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booting Linux also?''. The answer is yes, we will. But let's not
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get into that just yet.
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24.
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Install MSDOS to Partition 2 (we'll need this in order to install
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Windows 95).
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25.
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Boot Partition 2.
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26.
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Install Windows 95 to this partition (if you are running the
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upgrade version of Win95, you may need to have your Win3.1
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installation disk 1 ready to insert).
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27.
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Boot Partition 1.
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28.
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Format Partition 4.
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29.
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Restore DOS data from tape (if any) to partitions 1 and 4.
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30.
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Boot the Linux Boot Floppy.
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31.
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Follow up with the Linux Ramdisk (Root) floppy.
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32.
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When you log in as root and get to the # prompt, type ``fdisk'' and
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press enter.
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33.
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Delete the last partition (the one we created in step 18).
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34.
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Add 1 16MB partition and tag it as filesystem type Linux Swap.
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(17MB)
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35.
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Add 1 last partition with the remaining cylinders on the disk and
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tag this as filesystem type Linux native. (198MB)
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36.
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Write the changes to the boot sector and reboot.
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37.
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When you get to the # prompt again, run setup.
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38.
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Install Linux to the last partition.
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39.
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When you install LILO, be sure to install it to the root of the
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last partition (NOT to the MBR, as you will destroy all of your
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previous work in this HOWTO if you do so). Add only the last
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partition to LILO and set the timer to zero. By doing this, when
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you select Linux from the OS/2 Boot Manager, LILO will activate and
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will then boot Linux from the logical drive on the extended
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partition. Since Linux is the only partition that we wish to
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activate from LILO, we don't need a timer on it (unless you have
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more than one Kernel that you wish to load. In this case, you may
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want to set the timer to something more than 0 seconds).
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40.
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Activate the Linux swap partition (refer to the Linux Installation
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and Getting Started Manual by Matt Welsh for this).
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41.
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Boot OS/2.
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42.
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Run FDISK.
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43.
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Add Linux to the Boot Manager using the Linux NATIVE partition
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(type 83 not 82!).
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Your FDISK screen should now look like this (or something like
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this):
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______________________________________________________________________
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FDISK
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Disk 1
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___________________________________________________________________________
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Partition Information
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Name Status Access FS Type MBytes
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___________________________________________________________________________
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MSDOS Bootable C: Primary FAT 11
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WIN 95 Bootable : Primary FAT 350
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Startable : Primary BOOT MANAGER 2
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None D: Logical FAT 511
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OS/2 Bootable E: Logical HPFS 127
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None : Logical Type 82 17
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Linux Bootable : Logical Type 83 198
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______________________________________________________________________
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...And you're done!
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Send any comments/suggestions/problems (as a last resort, please!) to
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me at r3mdh@raex.com.
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Mike Harlan, 11 NOV 1997
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