Look in your event logs to see if the errors are being placed there. I’ve been told that is where they are recorded when they occur, but I’ve not had a problem with a CHKDSK since I learned of this.
I’d play it safe and replace the drives if they are giving you continual errors. CHKDSK should mark the sectors as unusable and not check them again, so youwould be seeing new errors. However, usually when I see errors in CHKDSK, the Dell utility will also see errors.
It is not actually advisable to check the hard disk for errors continuously. Remember that the hard disk drive is spinning disk and continuous spinning of the platter inside the disk could cause further hardware damage. Performing checkdisk once a month would do the job.