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BlindGoldfish

macrumors regular
Original poster
Jan 15, 2010
107
0
I'm pretty sure it is the hard drive lifting the head as it senses "shock," but I can't tell if it is doing it excessively. I'll be working in bed on something and lift my legs and hear the click. Sounds like it is coming from the upper right hand part of the keyboard. Anyone else heard this? My old Macbook didn't do this...
 
I think I know what you're talking about.

I got this as well whilst I was carrying my MBP up the stairs.

Might just be anti-shock protection but I could be wrong.
 
I think I know what you're talking about.

I got this as well whilst I was carrying my MBP up the stairs.

Might just be anti-shock protection but I could be wrong.

I think you're right. I tried holding it in the air and lowering it briskly but smoothly and can reproduce it every time. The next question... is this normal?
 
It should be sensitive, it's there to prevent damage to your HDD occuring.

Thanks. I guess I was just surprised to hear it so often. It isn't exactly quiet, and none of my past apple laptops have made such a pronounced noise.
 
It has always been this sensitive. The difference is that the drives are simply louder.

The drive does not stop at all, that would cause excessive wear. The read/write arm simply parks for a second and then resumes reading and writing.

It's not destructive and will save your data when you drop it down the stairs, haha.
 
The parking of the head noise drove me nuts. It would do it constantly whether I moved the MPB or not. It was certainly one of the main reasons I switched to a silent SSD.
 
I have had an old vaio laptop(2002) with an IBM hard drive, it makes noises from time to time as well like described here. Later hitachi bought IBM's hard drive dept....and brought over the noise at the same time.:confused:

It is completely normal, if you found it annoying maybe you should consider replacing it with another brand :p
 
yeah.. my Thinkpad does it as well. Both the macbook and the thinkpad have an accelerometer (hope that's spelled right) built in.
As people before said, it's there to protect your harddrive platters / arms from damage. Nothing to worry about.

On the thinkpad you're able to disable it.
Does anyone know wether that's possible on the mbp as well?
Mine is still stuck in china -.-
 
Send Leslie Nielson after it, hahaha.

But seriously, yes there is a terminal command to disable a Mac's accelerometer. MRoogle, my friend!
 
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