fzabkar wrote:
hddguy wrote:
Of course it is always wise to run a sequential surface verification tool such as MHDD/HDDscan on a drive with potentially failing heads

The OP wrote ...
"I don't plan on using it for anything, apart from playing around and learning."
In a topic entitled "Clicking Samsung and Maxtor disks with BAD sectors", you wrote ...
clicking-samsung-and-maxtor-disks-with-bad-sectors-t7968.html?hilit=clicking%20mhdd"I have seen many of these disks which all appear to be good in MHDD, but on trying to recover the disks click constantly but the clicking is because of bad sectors not bad heads."
... and ...
"I performed head swap and got 100% data. I was not sure about Head Swap at first because MHDD will scan the disk 100% with no errors, but obviously the heads were damaged bacause head swap was successful. "
In another topic you wrote ...
hard-disk-drives-data-recovery-and-repair-f1.html"Is your hdd identified correctly in BIOS? Are there any symptoms such as a clicking noise? Have you tried testing the hdd with MHDD? You will get much better idea of the problem with MHDD, and if you can post here the MHDD scan results I am sure I can be of more help also."
I am not sure what point you are trying to make with this?
All drives should be handled differently; as common failure modes are different between manufacturers, and even model/series.
Because of different firmware all drives behave slightly different; Even if the model number is the same, but the firmware version is different the drive can exhibit different behavior.
The point that was made was that performing a media scan (with MHDD, HDDScan for example) can sometimes bring to light patterns in the disk reading process that can point to a weak or failing head/s. Sometimes even radial damage, or just degrading areas of the disk.