I would appreciate your experience / knowledge on this matter. I have googled around and cannot find a definitive answer.
I am in a state of conflict with myself, and cannot decide what to believe!
Ok, so I'll start with the facts I am seeing.
I started a HD Tune 2.55 scan on said external HDD, in its original enclosure. No bad sectors were found, all was ok. In SMART RAW value was 0. So prior to this no sectors had been reallocated.
My main issue was with the enclosure, it was exceptionally hot, with no fans and was burning hot to touch. So I decided to remove the IDE HDD and move it into a better enclosure.
The enclosure itself was pretty tricky to take apart. Firstly the HDD had to be unscrewed from the bottom of the enclosure. This meant that in the process of removing the front panel. It did take a few knocks on the sides of the enclosure. I wouldn't say they were heavy blows, as it was quite tightly packed into the enclosure. I did hear it hitting against the metal though.
When I removed the drive, no physical damage was at all obvious - not even scratches. I do know of course HDD's are quite fragile, and it doesn't take a lot for bad sectors to occur.
Anyway, I then placed it in a box - loose and left it for the next day.
When I plugged it into the new enclosure, it was quite tricky to get the IDE cable ligned up correctly, due to how compact things were in there. I do have problems with co-ordination so this makes it more difficult for me, than it will for others.
As a result of this, the HDD showed up in HDD Sentinel but with no capacity and a ? below it.
When opening up in Disk Management, Windows want to initialize the disk. Which I of course didn't do.
I then decided to make sure the IDE cable was fitted correctly, and after some effort, I managed to get it seated correctly. I don't believe initially the connection was good, and may not have aligned with all the pins correctly.
I then plugged the HDD into the computer again, and all showed up correctly. However, the following SMART errors are now reported...
Power on hours: 12 hours
Ultra CRC DMA Count - 1
Reallocated Sectors - 185
Hard Disk Health (According to HDD Sential is now only 25%)
With the Ultra CRC DMA Count being at 1. It would suggest that indeed the IDE Cable wasn't correctly fitted, after a period of time. With no errors occuring this then should resort back to 0. I think it's different per drive? But it's something like a 24 - 72 hour period window.
Keeping in mind all that I have said, I am very interested to hear your thoughts. Running a surface scan using HDD Sentinel doesn't show any further bad sectors, but of course SMART has already reallocated the ones it believes are 'bad'.
Thanks in advance!