TITLE
    PC Compatibility Card: CDR101 error reading CD-ROM Discs (10/96)
Article ID:
Created:
Modified: 		20500
10/3/96
10/3/96
TOPIC


    I have a PC Compatibility Card in my Power Macintosh computer. I have installed the DOS/Windows drivers for the CD-ROM, but I can only access CD-ROM discs when I am using the Mac OS. When I try to access a CD-ROM disc, I get a message, "CDR101: Not ready reading drive E:, why?

DISCUSSION



    CDROM.SYS is the MS-DOS driver allowing the PC Compatibility Cards to access Apple CD-ROM drives. CDROM.SYS requires the proper loading of the Apple CD-ROM extension in the Mac OS, when the Mac OS is starting up. Here are some reason why you may be getting the CDR101: Not ready reading drive E: message.

    1) You may be using a third-party CD-ROM drive that uses its own CD-ROM extension instead of the Apple CD-ROM extension. Check the CD-ROM drive manufacturer to see if it is compatible with the Apple CD-ROM extension. If it is not compatible, you will not be able to use the CD-ROM drive when you are in the DOS/Windows environment.

    2) You may be using CD-ROM acceleration software with an Apple CD-ROM drive that replaces the Apple CD-ROM extension. If this is the case, you need to use the Extension manager to switch between the Apple CD-ROM extension and the third-party CD-ROM extension at startup, when you plan on using the PC Compatibility Card.

    3) You may be using Apple CD-ROM version 5.1.1 or 5.1.2. With these versions of Apple CD-ROM, the PC/Windows environment is unable to read CD-ROM discs if a CD-ROM is not in the drive at startup. The document titled "DOS Compatible: CD-ROM Needs to be in Drive at Startup" explains this issue. To resolve this issue, install Apple CD-ROM 5.1.6 or greater.

    4) The CD-ROM you are trying to use may not be a format that the PC Compatibility Card can read. The following formats are supported:

    ISO 9660
    Audio
    Hybrid (dual-format Mac/PC) CD-ROM discs*.

    * NOTE:
    Requires Apple CD-ROM 5.1.5 or later.


Document Information
Product Area: Computers
Category: DOS Compatible
Sub Category: PC Compatibility Cards
Keywords: kwindows

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