Win10x64 1803: Full Format of Hard Drives Faulty?

A few days back I got a slew of disk errors in Event Viewer and quickly backed up the drive in question and started testing it. Before that, I checked and the only errors in the SMART data were crc errors, which do not normally indicate a failing drive, especially in the absence of other errors.

Using the drive manufacturer's utility when booting from a pendrive:
-I tested the disk surface and found 1 bad sector and quite a few slow-read spots.
-I performed a write-erase.
-I then tested the disk again with various tools. All good.
-I quick-formatted the drive with a utility and tested again. For hours. All good.
-I then formatted the drive using Disk Management and selected a full format.
-The drive then miserably failed all testing right off the bat.

This made me think I had botched the repairs and/or had a truly faulty drive, since a full format is supposed to test for and mark bad sectors and ready the disk for use.

Not one to give up, I repeated the above process with a variety of very similar tools. Each time, all testing goes fine if I do not perform a full format using Disk Management. Raw, with no partition, partitioned but not formatted, or quick-formatted, surface reads and writes are as flawless as a normal drive gets unless I use a full format. Hmmm.

Since I have another drive of the same make, model, and purchase date, used in the same machine, I decided to back it up and test it, fearing the worst. Note that this drive had shown no errors of any kind, ever. Initial testing was flawless. After a write-erase and full reformat, the exact same issue has appeared: full formats lead to countless bad sectors.

I do not have a final conclusion at this juncture. I have the two drives (quick format only) now hooked up and operating, reporting good SMART data and passing tests, and no disk read errors showing up in Event Viewer. However, I thought I might share this experience to see what others might have to say, and if indeed there is something botched in this release of Windows 10, give a heads-up. I'll post more as new data comes in.

Thanks. To update, I tested with a wide variety of tools, and also have done a "low-level" format of writing all zeros with 3rd party and drive mfgr tools. I can confirm that, at least on the X99 chipset, the interaction between the controllers and MS's format tool produces errors on full format (not quick) of HDD. This includes testing after disassembling and reassembling my PC down to every cable and connection for a full rebuild. This eliminates cable and connector issues as culprits, and leaves only the X99 SATA controller or current Intel drivers, or the format utility itself, as culprits for bad full formats of HDDs.