Error - "Disk Error 34" Or "Invalid Disk Chan

DocumentID: 610369
Revision Date: 29-Feb-96 1:34:30 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Symptoms: The error "Disk Error 34" or "Invalid Disk Change" occurs. Solutions: The error indicates that the user removed a diskette from the floppy disk drive and replaced it with a new diskette while still editing files contained on the original diskette. DOS stores a copy of the diskette's File Allocation Table (FAT) in memory while a file from the diskette is opened (in WordPerfect, the user opens a file by retrieving it from the diskette). DOS stores the FAT so it can then quickly update the diskette's FAT if the file being edited from the diskette is resaved on the same diskette. The error warns the user that the diskette whose FAT is still being retained by DOS in memory has been removed from the drive. The results can be damaging. For example, if a file is saved to the new diskette, DOS will update the new diskette's FAT with the FAT currently stored in memory which is the original diskette's FAT. The error, however, in this case is incorrect. There are no files opened on the diskette that the user has removed and replaced. The error is caused by LANtastic not tracking the files that are opened, but instead is tracking the label names of the diskettes being used. LANtastic checks the label name of the new diskette and finds that it does not match the original diskette. LANtastic then generates an "Error 34" that WP receives through the operating system, which is LANtastic. The customer worked around the problem by not formatting diskettes using DOS 5.0. DOS 5.0 automatically puts a serial number as a label on the diskette at the time of format.

Answer:

Details:

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