HDDScan: All bad blocks gone after format

A few days ago I scanned my HDD using HDDScan. After 100 000+ consecutive bad blocks I stopped the scan because it was taking hours. Today I formatted the HDD and after scanning it again (verify) the results looked really healthy.

Some info: Before the format the drive was split up into the following partitions:

• 391GB EXT4
• 8.4GB Linux Swap
• 473MB FAT32
• 100GB NTFS
• 431GB NTFS

The bad blocks appeared after about 17% of the drive, or ~70GB of a total 931GB. It's now formatted to a single NTFS partition.

My questions is: Are the bad sectors a problem even though they don't show up anymore and should I replace the drive anyway? Or is it a possibility that the the bad sectors were a false positive caused by the non-NTFS partitions?

Edit: I ran chkdsk as per Renameduser32s request, these are the results.

Solution 1:

If the disk is new and if it is high quality, then it may have had issues in the first format and setup coming from the way it was used.

In this case, formatting properly and seeing there are no errors, the disk should be perfectly fine to use.

If the disk is older and so has had long use, I would not trust a single format. Errors could be hidden by this, especially if you used a quick format. Even if CHKDSK reports good, age is against the drive.

This being the case I would replace the drive with a new drive or SSD.