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                           TECHNICAL SUPPORT BULLETIN

FILENAME:   TECH014.DOC
NUMBER:     014
SUBJECT:    DOS5.0

DATE:       June 18, 1991
TIME:       5:11 PM

SOURCE:         Tech Support
RELEASE STATUS: Public

TITLE:
    MS-DOS 5.0 upgrade when STACKER is installed AND boot drive is SSWAPped.

OVERVIEW:
    STACKER has been found highly compatible with MS-DOS 5.0.  This bulletin
    outlines the upgrade procedure to 5.0 on a system where the boot drive
    (usually C:) is SSWAPped with a STACKER volume.

ISSUES/COMMENTS:
    1) If STACKER has not yet been installed, the DOS 5.0 upgrade should be
    performed first, then STACKER should be installed.

    2) If:
        a) STACKER has been installed, AND
        b) the boot drive (usually C:) is NOT being SSWAPped (verify via
        SWAPMAP), AND
        c) there is enough room on C: (2.8 MB) for the MS-DOS 5.0 files, THEN

        simply run SETUP from the diskette drive.

    It may be necessary to free up room on C: for the MS-DOS files if there is
    not enough room for them.

    3) Otherwise, this procedure assumes that C: is the boot drive, and that it
    is SSWAPped with a STACKER volume. Type SWAPMAP from the \STACKER directory
    to verify.  It also assumes that DOS files reside in a directory called
    \DOS.  All of the following steps should be taken for a successful upgrade.

RECOMMENDED ACTIONS:
    1) Boot computer as usual.  Change directory to C:\ (root).

    2) Determine names of DOS hidden files:
    Type
            \STACKER\SDIR C:\ /H /P

    There are two system files required by DOS; on some systems they are
    MSDOS.SYS and IO.SYS; on others they are IBMBIO.COM and IBMDOS.COM.  Record
    which two are listed on the screen.

    3) Install MS-DOS 5.0 to diskettes:
    Regardless of density, an installation from 5.25-inch disks will require
    seven diskettes; if from 3.5-inch disks, installation will require four.
    The diskettes do not need to be formatted.  Insert Disk 1 to drive A:.  A
    different drive may be used.  Type

            A:SETUP /F

    and follow the instructions on the screen.  BE SURE to install MS-DOS 5.0 to
    diskettes that will fit the A: drive for later rebooting.

    4) Prepare to copy system files to STACKER volume:

    Reboot from the hard drive.
    Change directory to C:\STACKER.  Insert the MS-DOS 5.0 STARTUP diskette to
    A:

    5) Remove attributes on MS-DOS 5.0 system files:
    Type
            SATTRIB -R -S -H A:\IO.SYS
            SATTRIB -R -S -H A:\MSDOS.SYS

    (If UNsuccessful, SATTRIB will return a message; otherwise it will simply
    return the DOS prompt.)

    6) Remove attributes on system files in STACKER volume:
    Refer to the DOS system files recorded in step (2).

        a) If IO.SYS and MSDOS.SYS, type

            SATTRIB -R -S -H C:\IO.SYS
            SATTRIB -R -S -H C:\MSDOS.SYS

        b) If IBMBIO.COM and IBMDOS.COM, type

            SATTRIB -R -S -H C:\IBMBIO.COM
            SATTRIB -R -S -H C:\IBMDOS.COM
            DEL C:\IBM???.COM

    7) Copy MS-DOS 5.0 system files to STACKER volume:
    Type
            COPY A:\IO.SYS C:\
            COPY A:\MSDOS.SYS C:\
            COPY A:\COMMAND.COM C:\
            COPY A:\COMMAND.COM C:\DOS

    8) Reset attributes on diskette and STACKER volume:
    Type
            SATTRIB +R +S +H A:\IO.SYS
            SATTRIB +R +S +H C:\IO.SYS
            SATTRIB +R +S +H A:\MSDOS.SYS
            SATTRIB +R +S +H C:\MSDOS.SYS

    9) Copy COMMAND.COM to drive which was C: at boot time (SWAPMAP to verify).
    Type
            COPY A:\COMMAND.COM <swapped drive>:\
            COPY A:\COMMAND.COM <swapped drive>:\DOS

    Then REBOOT with the MS-DOS 5.0 STARTUP diskette in A:.

    10)Transfer system files to uncompressed (host) drive:
    Insert the MS-DOS 5.0 SUPPORT diskette.  From A: type

            SYS C:

    It may be necessary to re-insert the STARTUP diskette.  If successful, a
    "System transferred" message will display.

    11)Remove the diskette and reboot (from the hard disk).

    12)Install MS-DOS 5.0 files to hard drive:
    Move (or delete) existing DOS files from the directory where they reside on
    the compressed drive (usually C:\DOS) then copy in all of the MS-DOS 5.0
    files; this will preserve the paths for CONFIG.SYS and AUTOEXEC.BAT.
    Replace DOS files on the host volume (drive with which C: is SSWAPped

    according to SWAPMAP) with the MS-DOS 5.0 versions.  Be sure that there is a
    copy of COMMAND.COM in each DOS directory.