Merhaba arkadaşlar,
Vmware vDR kullanıyorsanız ve " Trouble reading files, error -3956 " hatası ile karşılaştıysanız yapmanız gereken işlemler aşağıdaki gibidir;

Log in to the VDR appliance console as the root user. (Default password is: vmw@re)
Stop the datarecovery service using this command:

# service datarecovery stop

Open the /var/vmware/datarecovery/datarecovery.ini file using a text editor. For more information on using these editors, see Editing files on an ESX host using vi or nano (1020302).
Verify if the the [Options] section within the file has an entry similar to::

BackupUnusedData=1

If this entry exists, add this line to the file to prevent the swap file from being included in the backup:

BackupUnusedData=0

Start the datarecovery service using this command:

# service datarecovery start