27" iMac Hard Drive Upgrade 2TB WD 2001FASS Temp Sensor ?
i plan to upgrade my HD from the built in 1TB Seagate ST31000528ASQ to the 2TB Western Digital WD2001FASS. Actually the WD drive is already lying here on my desk.
The only Problem is the temp sensor,... 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). On http://files.macbidouille.com/mbv2/news/news1109/cables1.jpg you can see the different Connectors, but there´re always the same 2 Pins used... so it shouldnt be a real problem to solder it on the new drive or put a new Connector on the cables... on the picture above there are even the numbers to get it from an apple dealer.... so far so good.
My Problem is: The drive i bought has got an 8 Pin Connector instead of the 6 Pin Connector showed. On the WD Descriptions it says, that 6 of the Pins are used (eg switching to SATA1-compatibility, but none for temp ... http://support.wdc.com/images/kb/ssc_desktop.jpg)
I know about the option to shunt out the connector, so that the fan will only have 1000upm... instead of ±4000
But the WD drive is a very quick 7200Upm drive and it surely will get hot during use... not a good idea in the tight-fitted iMac enclosure.
Did anyone do it? or can give me a hint? Which Pins are used? - Maybe someone put his 1TB WD Model and knows.
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?
PS: I already did a lot of these things, please don´t tell me to go to a apple dealer... I´m gonna do it. Please excuse my imperfect English.
Late 2009 27" iMac C2D, Mac OS X (10.6.4)