64776: Acronis Cyber Backup 12.5: Operation fails with "Cannot use the tape drive without a properly installed driver"

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Symptoms

Activity (e.g. backup or replication to tape) fails with the following error:

Cannot use the tape drive without a properly installed driver

Cause

Drivers for the tape drive and/or medium changer are absent.

Solution

Make sure that device drivers are up to date:

  1. Navigate to Device Manager (Win+R -> devmgmt.msc) and make sure the latest version of the driver is installed for both tape drive(s) and medium changer(s): update or reinstall drivers according to instructions from the device vendor:

  2. Make sure that the installed driver is provided by tape vendor and not by Microsoft:
    Example of correct driver Example of incorrect driver
  3. Run inventory.

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