Creating a 2MB OS/2 2.0 bootable partition

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Several messages here on the IBMOS2 forum and in its library (eg, BOOTDI.GA) have been concerned with emergency booting of OS/2 _from_floppy_ to recover EAs, CHKDSK, etc. I have come up with my own scheme which I think meets the following needs:

1. Allows the most flexible use of multiple versions of DOS & OS/2.
2. Allows emergency recovery booting FROM THE HARD DISK, in order to run

After backing up my entire hard disk, I ran the OS/2 install and ran FDISK, and created the following partitions, in the following order on the disk:

   1. 1mb, Boot Manager, and mark it startable.
   2. 1mb partition (primary), for booting DOS.  Mark this one as
      drive C:, and bootable
   3. 1mb partition (primary), for booting another version of DOS
      (DR-DOS?, future MS-DOS?).  Mark it bootable.
   4. However many program & data partitions (extended) I wanted.
      Mark the one of these that you want to contain most of the OS/2
      files as INSTALLABLE.
   5. Several 2mb partitions (extended), for regular booting of as
      many OS/2 systems as I might want to have on the disk at the
      same time (for me, two).  Mark it bootable.
   6. 2mb partition (extended), for what I call "Partition Manager"
      (used for OS/2 emergency recovery).  Mark it bootable.

I then continued with a normal OS/2 install into the INSTALLABLE partition. Upon bringing up OS/2, I then FORMAT (must use OS/2, not DOS) all of the other extended partitions. I specified the FAT file system for the 2mb partitions. I then copied the following files into the "Partition Manager" partition (#6 above):

 Directory of I:\
 DLL          <DIR>     05-25-92   1:34a
 OS2          <DIR>     05-25-92   1:34a
 OS2BOOT           1099 03-30-92   2:00a
 OS2KRNL         716044 03-30-92   2:00a
 OS2LDR           32256 03-30-92   2:00a
 OS2LDR   MSG      8440 03-30-92   2:00a
 CONFIG   SYS       462 05-25-92   1:31a
 COUNTRY  SYS     24604 03-30-92   2:00a
 KEYBOARD DCP      5177 03-30-92   2:00a          -- from the install floppy
 VTBL850  DCP     10478 03-30-92   2:00a          -- from the install floppy
 CMD      EXE     87552 03-30-92   2:00a
 CHKDSK   COM     68656 03-30-92   2:00a
 FDISK    COM    104759 03-30-92   2:00a
 FORMAT   COM     63744 03-30-92   2:00a
        14 file(s)    1123271 bytes
 Directory of I:\DLL
 .            <DIR>     05-25-92   1:34a
 ..           <DIR>     05-25-92   1:34a
 BKSCALLS DLL       401 03-30-92   2:00a
 BMSCALLS DLL       398 03-30-92   2:00a
 BVHVGA   DLL     40668 03-30-92   2:00a
 BVSCALLS DLL       454 03-30-92   2:00a
 DOSCALL1 DLL     87884 03-30-92   2:00a
 KBDCALLS DLL       858 03-30-92   2:00a
 MOUCALLS DLL      1010 03-30-92   2:00a
 MSG      DLL       477 03-30-92   2:00a
 NAMPIPES DLL       711 03-30-92   2:00a
 NLS      DLL       465 03-30-92   2:00a
 NPXEMLTR DLL     25280 03-30-92   2:00a
 OS2CHAR  DLL     56320 03-30-92   2:00a
 QUECALLS DLL     14994 03-30-92   2:00a
 SESMGR   DLL     31256 03-30-92   2:00a
 VIOCALLS DLL      1825 03-30-92   2:00a
        17 file(s)     263001 bytes
 Directory of I:\OS2
 .            <DIR>     05-25-92   1:34a
 ..           <DIR>     05-25-92   1:34a
 FD16-700 ADD     29962 03-30-92   2:00a	-- Future Domain SCSI only
 IBM1FLPY ADD     24026 03-30-92   2:00a 	-- non-PS/2 only
 IBM1S506 ADD     12908 03-30-92   2:00a 	-- non-PS/2 only
 IBM2ADSK ADD     10724 03-30-92   2:00a 	-- PS/2 only
 IBM2FLPY ADD     12997 03-30-92   2:00a 	-- PS/2 only
 IBM2SCSI ADD     15780 03-30-92   2:00a 	-- PS/2 only
 000000   BIO      2560 03-30-92   2:00a
 W020100  BIO      3072 03-30-92   2:00a
 W020101  BIO      4608 03-30-92   2:00a
 W050000  BIO      1536 03-30-92   2:00a
 W050100  BIO      2560 03-30-92   2:00a
 W050101  BIO      3072 03-30-92   2:00a
 W060100  BIO      6656 03-30-92   2:00a
 W0F0000  BIO      1536 03-30-92   2:00a
 OS2DASD  DMD     31994 03-30-92   2:00a
 OS2SCSI  DMD     10462 03-30-92   2:00a
 IBMINT13 I13      9564 03-30-92   2:00a 	-- non-PS/2 SCSI only
 ABIOS    SYS       103 03-30-92   2:00a
 CLOCK01  SYS      3666 03-30-92   2:00a 	-- non-PS/2 only
 CLOCK02  SYS      3710 03-30-92   2:00a 	-- PS/2 only
 KBD01    SYS     29013 03-30-92   2:00a 	-- non-PS/2 only
 KBD02    SYS     25429 03-30-92   2:00a 	-- PS/2 only
 PRINT01  SYS      8934 03-30-92   2:00a 	-- non-PS/2 only
 PRINT02  SYS      7994 03-30-92   2:00a 	-- PS/2 only
 SCREEN01 SYS      1441 03-30-92   2:00a 	-- non-PS/2 only
 SCREEN02 SYS      1590 03-30-92   2:00a 	-- PS/2 only
        28 file(s)     265897 bytes
 Total files listed:
        59 file(s)    1652169 bytes

Note that if you need any special disk drivers, you will have to include them (like I needed to for FD16-700.ADD above).

Note also that the above includes only CHKDSK, FDISK, and FORMAT. If you want to access any other OS/2 programs (eg, MAKEINI, ATTRIB), you can do so by switching to the partition that contains them, and run them. For obvious reasons, this may not be practical with the above three, which is why I included them.

The above CONFIG.SYS contains:

 ProtectOnly	= Yes
 Buffers	= 32
 DiskCache	= 64
 IOPL		= Yes
 MemMan		= NoSwap
 BaseDev	=IBM1FLPY.ADD			-- non PS/2 only
 BaseDev	=IBM1S506.ADD			-- non PS/2 only
 BaseDev	=FD16-700.ADD			-- non PS/2 only
 BaseDev	=IBM2FLPY.ADD			-- PS/2 only
 BaseDev	=IBM2ADSK.ADD			-- PS/2 only
 BaseDev	=IBM2SCSI.ADD	/LED		-- PS/2 only
 BaseDev	=IBMINT13.I13			-- non PS/2 only
 CodePage= 850
 Country	= 001,		\COUNTRY.SYS
 DevInfo	= Kbd,	US,	\KEYBOARD.DCP
 DevInfo = Scr,	VGA,	\VTBL850.DCP
 LibPath  =.;\DLL
 Set  keys=ON

NOTE THE ABSENSE OF DRIVE LETTERS IN THE ABOVE FILE. This is important, as running FDISK can change drive assignments.

Now the above partition is bootable, and comes up in OS/2 command mode.

To install a particular version of OS/2 into one of the 2mb partitions (say drive G:):

1. If you want to put ANY and/or ALL of your OS/2 files in directories
   with other than the "standard OS/2" directory names, NOW IS THE TIME
   TO MAKE THIS DECISION for THIS particular 2mb OS/2 boot partition.
   For any such directories, edit the INI.RC and INISYS.RC on your
   normally-installed OS2 drive (say drive D:) in D:\OS2, and change
   the pathnames to what you want them to be (do NOT move the files
   at this time).  Of course, save the original .RC files!
   This step is not necessary unless you plan to have multiple versions
   of OS/2 on your system at one time.
2. Copy the above H:\OS2*.* (boot) files into G:\.  Also copy your
   OS/2 version of AUTOEXEC.BAT to G:\.
3. Copy the above H:\OS2\*.* (driver) files into a directory named
4. Run:  MAKEINI  G:\OS2.INI     D:\OS2\INI.RC       (your edited file)
         MAKEINI  G:\OS2SYS.INI  D:\OS2\INISYS.RC    (your edited file)
5. Copy the OS/2 version of CONFIG.SYS into G:\, modifying it so
   that USER_INI and SYSTEM_INI point to the above G:\OS2.INI and
   G:\OS2SYS.INI files.  If you decided to move any OS/2 files, make
   the appropriate changes to this copy of CONFIG.SYS.
6. If you decided to move any OS/2 files, boot the "Partition Manager"
   and move them at this time.
7. Now boot partition G:.  OS/2 will reinitialize itself (like it does
   after every install).

If OS/2 (on drive G:) ever "permanently" crashes, just:

1. Boot the "Partition Manager".
2. Repeat step #4 above.
3. Remove directories G:\NOWHERE and G:\OS2.DTP, and all directories
   and files in them.
4. Run   CHKDSK G: /F
5. Reboot partition G:

Note that steps #3 can be done under DOS (that's what I do); if you do so, then also run:

         ATTRIB G:\*.* -H -S -R /S
         DEL    G:\EA?DATA.?SF

To install DOS, just boot a DOS diskette and "FORMAT C:/S". By making appropriate changes to the DOS CONFIG.SYS and AUTOEXEC.BAT, you can put all other DOS files anywhere you want them. To install another version of DOS (or the same version, say with a different CONFIG.SYS/AUTOEXEC.BAT) in the other partition, just run FDISK from the "Partition Manager" and change the "C:" partition.

If you don't like my idea of the 1mb DOS boot partitions (and changing all of your references to C: to D:, D: to E:, etc), you can of course omit them and make the first partition on the drive (after the Boot Manager) a primary partition containing DOS.