62523: Acronis Backup, Acronis Backup Cloud: Backup fails with error "The request could not be performed because of an I/O device error"

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You have Acronis Agent for Windows and create a backup of Entire machine to local share (or cloud).

The backup fails with the error:



The error message in our product shows that the issue comes from Microsoft (Windows error: (0x8007045D)) and is caused by disk errors. See details in this Microsoft KB article.

Generate a system information report, open it and check the disk_report log within it. If it shows the errors on disk, use the chkdsk tool as described below.


To resolve this problem, follow these steps: 

  1. Open Command Prompt: click Start, in Search type cmd, right-click cmd.exe in the Programs list, and then click Run as administrator. If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
  2. At a command prompt, type the following command, and then press Enter:

    chkdsk /R X:

    In this command, X: is a placeholder that represents the drive letter of the volume that you want to check.
  3. Press Y when you are prompted to check the disk the next time that the system restarts.
  4. Close all applications, and then restart the computer.
During the restart process, Windows checks the disk for errors, and then Windows starts.

     5. After the computer restarts, repeat steps 1 through 4 for the other volume, and then rerun the backup operation.

After performing this step, retry the backup.

Additional information

If the issue persists, please collect the Acronis VSS Doctor report, system information report and contact Acronis Customer Central.

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