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Can't find device driver: 4mmdat

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by ndufour

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I uninsatlled Arcserve and installed Backupexec. After hours of frustration because BE wouldn't run, I uninstalled it. Now, I can't get the NT backup to work. It says it can't find the device but it finds the tape drive. I have removed and re-installed the 4mmdat file to no avail. What's next besides re-installing NT?

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by doug_lester

What I would try is useing your nt install disk and open it from your cd,cdrw etc.. Then cut copy and paste the file in the folder that it originated from......Douglas Lester

by shmaltz

I recently ran into a similar problem. You didn't mention what type of Tape Drive you have installed. But I assume its a DDS.
Go to the website of the company the drive was made by. Downlaod the latest drivers. Uninstall the 4mmdat from Windows NT from control panel reinstall the new one.

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