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Microsoft KB Archive/104534

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Knowledge Base

MS-DOS Setup Err Msg (CD-ROM System): Hard Disk Not Readable

Article ID: 104534

Article Last Modified on 11/19/1999


  • Microsoft MS-DOS 6.0 Standard Edition
  • Microsoft MS-DOS 6.2 Standard Edition
  • Microsoft MS-DOS 6.21 Standard Edition
  • Microsoft MS-DOS 6.22 Standard Edition

This article was previously published under Q104534


If you have an Adaptec 1542B SCSI disk, a SCSI CD-ROM drive, and ASPI4DOS.SYS is loaded when you install MS-DOS, you may receive the following error message:

Hard disk not readable


This problem occurs when Setup thinks the CD-ROM drive is the boot drive. This problem occurs when you have the CD-ROM drive and the SCSI drive set to #0 and #1, respectively.


To work around this problem, do one of the following:

  • Remove the disk from the CD-ROM drive, restart your computer, and run Setup.
  • Remove ASPI4DOS.SYS from the CONFIG.SYS file, restart your computer, run Setup, put ASPI4DOS.SYS back in the CONFIG.SYS file, and then restart your computer again.
  • Reconfigure the CD-ROM drive so it uses a SCSI ID other than 0 or 1.

Additional query words: 6.22 6.20

Keywords: KB104534