I've noticed several problems during copying files to external drive e.g. sometimes copying ends up with message about problem during writing/reading (I do not know exact message sorry) then I had to retry copy given file unless it is copied. I've noticed in Event Viewer following event IDs:
51 - An error was detected on device \Device\Harddisk1\DR12 during a paging operation. 140 - The system failed to flush data to the transaction log. Corruption may occur in VolumeId: D:, DeviceName: \Device\HarddiskVolume20. (A device which does not exist was specified.) 157 - Disk 1 has been surprise removed. 26 - Description: Windows - Delayed Write Failed : Windows was unable to save all the data for the file \Device\HarddiskVolume4\Program Files\Microsoft SQL Server\MSSQL$INSTANCETWO\LOG\ERRORLOG. The data has been lost. This error may be caused by a failure of your computer hardware or network connection. 7 - The device, \Device\Harddisk2\DR2, has a bad block.
Is my hard drive failing? If yes what is the recommended way to rescue data?
Should I check for another event IDs?
The disk is External Samsung D3 2TB, and here comes the output from utility called HDDscan (smartctl and HDtune were not able to read SMART data from the disk):