CDR 101

CD-ROM error codes

Below is a listing of what causes CDR 101, 102, and 103 errors when accessing CD-ROM drives. See the CD-ROM help page for other questions and answers relating to CD-ROM drives.

CDR 101

Cause

Driver issue or hardware issue.

Recommendations

Boot to a:

Attempt to boot from a boot disk that has CD-ROM support. Test the CD-ROM drive. If the drivers are properly loaded on the diskette, it's a good possibility it's a hardware issue; attempt to reset the cables.

Check cables

If you have moved or installed anything recently into your computer, there may be a loose cable. Open your computer and reseat the cables connected on the back of your CD-ROM drive and connected to your motherboard.

Check drivers

Verify you have the latest CD-ROM drivers.
Booting A: works, however, without diskette it does not work - It's a good possibility that the drivers are not being loaded properly in your autoexec.bat and config.sys.

CDR 102

Cause

Caused by software driver issues.

Recommendations

Remove /e from mscdex.exe line.

Set emm386.exe to auto in the autoexec.bat by adding /auto to the end of the emm386 line in the config.sys.

CDR 103

Cause

CD does not follow the ISO-9660 standard.

Recommendations

Ensure that the CD is clean. Follow steps on cleaning page.

Extra information

If this issue only occurs with one CD, it's a good possibility the CD either does not follow the above standard or that the CD was incorrectly made. We recommend you contact the manufacturer of the CD. However, if this issue occurs with every CD, the CD-ROM drive may physically have issues and we recommend you contact the manufacturer of the CD-ROM drive.

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