Do you think that influence of small shocks is a problem of all 2.5/3.5 7200RPM HDD's? Would the 2.5 Seagate Momentus 7200 RPM will behave same, they are mostly 5400rpm, 7200rpm quite rare. Maybe the SSD (OS) + HDD (Files) is good bundle, but I ensure that even if not store files on SSD and remain it only for OS purposes it will eventually broke down since bad sectors will collected due to OS log creation, Even viewer, etc.

I too have the same problem, where the G-sense error rate increases. The rate of increase seem to be erratic. There was probably 100 power on hours where it stayed at a hexadecimal of 47, and then 5 hours after that, it went to 48, then 3 hours after, it went to 49, and after another 3 hours, it went to 4A.

Like the OP, I didn't move or bump into the laptop during operation.

The laptop I am using it on is the ASUS N56jr, and it has the WDC WD7500BPKX-80HPJT0 750GB hard drive.

I already contacted both Asus and Western Digital support and the answers I got were less than stellar, as are most threads in many forums stating the issue.

Here is the problem. G-sense error rate goes up without the laptop moving, or bumped into. It even goes up when the laptop is not touched.

In my case, Reallocated sector count, current pending sector count, Uncorrectable sector count, read error rate, write error rate, seek error rate, ultra DMA CRC error rate, recalibration retries, spin retry count, reallocation event count are 0 and stayed at 0 during the duration of the time when the G-sense error rate was increasing.

All I want to know is if the hard drive is still usable, and if the rising g-sense error rate can be ignored if the values I listed before remain at 0, or is the hard drive going to fail any time soon?

Is the sensor that detects G-force super sensitive?
Is there really a head mechanism failure?
Is the hard drive screwed on tightly to the laptop?

Those are the questions.

The last thing anyone and I would want to do is replace a hard drive that is still usable for 5+ years because a sensor is too sensitive, or the hard drive isn't screwed on properly, but is still usable. The flip side of the coin is that anyone and I won't like it if our hard drive failed, when it only logged 1000 or less hours of operating time.

I want to know some things from people who share this problem. Does the G-sense error rate more likely to increase when the spin up time is higher? Does it happen only to 750GB western digital black hard drives installed in ASUS laptops?

This is one of those things that none of the forums, ASUS Support, or Western digital support has given a consistent answer. Either it is failing and needs to be replaced, or they say it is fine, and I don't know what to think.

I once asked Western Digital support about my problem, and they replied back with "did your laptop slow down, and are there any other errors", and I responded with how the read error rate, write error rate, seek error rate, bad sectors are all 0, and that the laptop didn't slow down considerably, and I have no response. I had to submit yet another support ticket to western digital, making detailed information on what I found out about my hard drive.

From what I found out, this problem seems to be exclusive to the WD black series, and I hope people with the same problem can shed some light if this problem is ignorable, or should be looked at.

I have the same problem with Western Digital Scorpio Black drives. I read on Asus RoG forum and also WD forum mentioning the same problem. WD Black drives appear to be extremely sensitive to non-shocking vibrations eventhough the chassis is sitting on the table with no hassle, which causes G-Sense Error Rate SMART value to grow in regular basis. I don't know whether it is a sign of failure (which is unlikely) and keep tracking it. Cheers.