OSCINHDS - ERROR DURING OS/2 WARP INSTALLATION: UNABLE TO OPERATE
           HARD DISK OR DISKETTE DRIVE
02/09/96

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        Error during OS/2 Warp Installation: Unable to Operate
                    Hard Disk or Diskette Drive
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Please Read Entire Document for Full Explanation of Procedures
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DESCRIPTION

During installation of OS/2 Warp, the following error message is 
received:

   OS/2 is unable to operate the hard disk or diskette drive.

RESOLUTION

Note: Make sure you have a backup of any file you intend to change.

* There could be an incompatibility between OS/2 and the system
  diskette-drive or hard-disk-drive controller:

  1. Edit the CONFIG.SYS file on the diskette or hard disk from where
     you are starting OS/2.

  2. Find the statements with BASEDEV=filename.ADD and change them to:

        REM BASEDEV=filename.ADD

  3. Be sure the following statements are in the file (x is 1 for
     non-Micro-Channel systems, and 2 for Micro Channel systems):

        BASEDEV=IBMxFLPY.ADD
        BASEDEV=IBMINT13.I13
        BASEDEV=OS2DASD.DMD
        BASEDEV=OS2SCSI.DMD

     Note: OS2DASD.DMD is needed for IDE and SCSI hard disks.
           OS2SCSI.DMD is needed for SCSI hard disks only.

* A diskette-drive or hard-disk-drive controller might have an
  additional device, such as a tape backup, scanner, network card, or
  modem, attached to it:

  Disconnect the additional devices, if possible.

* An interrupt request (IRQ) level conflict might exist between the
  diskette-drive or hard-disk-drive controller and other installed
  devices:

  Change IRQ levels to eliminate conflicts.

* The hard-disk partition where you are installing OS/2 is compressed
  with a DOS data-compression program:

  Use the data-compression program to uncompress the partition; then
  restart the installation procedure.

* Traps usually are symptoms of software-related problems. When you
  have reviewed software symptoms, consider a hardware cause relating
  to caches and memory such as:

  - If the computer has an 80486 microprocessor, it might require
    faster RAM chips (60 ns or 70 ns).

  - There might be a problem with the external (level-2) CPU memory
    cache or main memory system on ISA or EISA systems. From setup or
    diagnostics diskettes, or from the built-in BIOS Setup program,
    try disabling all shadow RAM and external (level-2) CPU memory
    cache.

    If problems persist during the installation of OS/2 after trying
    this step, turn off the turbo switch, if available, disable caching
    during installation, and try again.

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