I can't give you all the details, but I can say that around the time of the 2009 models, Apple switched from using a sensor that was basically just glued or taped onto the drive to one being built into the drive.
PS: I already did a lot of these things, please don´t tell me to go to a apple dealer. Is the Temp Sensor a Diode or a resisitor, or even the RS232 some guys believe (i don´t)? Do only OEM HDs have the right connectors or firmware? not a good idea in the tight-fitted iMac enclosure.ĭid anyone do it? or can give me a hint? Which Pins are used? - Maybe someone put his 1TB WD Model and knows. instead of ±4000īut the WD drive is a very quick 7200Upm drive and it surely will get hot during use. I know about the option to shunt out the connector, so that the fan will only have 1000upm. On the WD Descriptions it says, that 6 of the Pins are used (eg switching to SATA1-compatibility, but none for temp. My Problem is: The drive i bought has got an 8 Pin Connector instead of the 6 Pin Connector showed. on the picture above there are even the numbers to get it from an apple dealer. so it shouldnt be a real problem to solder it on the new drive or put a new Connector on the cables. 1109/cables1.jpg you can see the different Connectors, but there´re always the same 2 Pins used. it´s not an external one anymore, but there´s a 2-Pin cable connecting directly to the hard drive (they say, i didnt open the iMac yet). Actually the WD drive is already lying here on my desk. I plan to upgrade my HD from the built in 1TB Seagate ST31000528ASQ to the 2TB Western Digital WD2001FASS.
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