Bad sectors

I have. 2 WD Red 3TB NAS Desktop Hard Disk Drive - Intellipower SATA 6 Gb/s 64MB Cache 3.5 in a Synology NAS. Although they are over 3 years old I haven’t used the NAS very much. I want to put it back to use but one of the drives is showing bad sectors and will not complete the Synology internal test. Is there anything I can do with the drive to isolate the bad sectors (89 of them) or do I need to replace the drive?

Replace the drive. If these bad sectors appeared out of the blue, then more bad sectors are likely to appear over time.