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Current version by oldturkey03 (vote details),

Title:

Hard Drive Fans slowly increasing speed

Text:

Hello everyone, in short I have two 21.5 inch iMacs, one from 2010 and a new one from mid 2011. I damaged the old one and bought the new one. The old one has a 1TB HD and the new 500GB. The old one receive a Brand new OEM HDD from Apple thanks to the hard drive replacement program. I tried to swap hard drives and they worked fine until about 30 40 minutes when the hard drive fan started to spin really fast and noisy of course. I did an SMC PRAM restart, repaired permissions, updated OSX and the problem keept going.<br /> <br /> I read in some other place about the issue with Apple´s propietary temperature sensor but all I have read is that the fans start to spin really fast as soon as one turn on the computer and in my case it takes some time. I even installed SMCFancontrol to reduce the speed but there is no change, the speed remains the same.<br /> <br /> So my question is do you guys and gals think this is releated to the Appe propietary temperature sensor or something else_ maybe a faulty HDD (although SMART says is OK).<br /> <br /> Is funny because both are Apple OEM Seagate basically the same model. And the 1TB one is Brand new, one might think that if Apple is pushing it´s temperature sensor all the new HDD should have the same technology.

Device:

iMac Intel 21.5" EMC 2428

Tags:

upgrade HD, fan speed increase, swapping hardware, compatible hardware

Status:

open

Accepted Answer:

122921

Edit by Andrew Optimus Goldberg,

Title:

Hard Drive Fans slowly increasing speed

Text:

Hello everyone, in short I have two 21.5 inch iMacs, one from 2010 and a new one from mid 2011. I damaged the old one and bought the new one. The old one has a 1TB HD and the new 500GB. The old one receive a Brand new OEM HDD from Apple thanks to the hard drive replacement program. I tried to swap hard drives and they worked fine until about 30 40 minutes when the hard drive fan started to spin really fast and noisy of course. I did an SMC PRAM restart, repaired permissions, updated OSX and the problem keept going.<br /> <br /> I read in some other place about the issue with Apple´s propietary temperature sensor but all I have read is that the fans start to spin really fast as soon as one turn on the computer and in my case it takes some time. I even installed SMCFancontrol to reduce the speed but there is no change, the speed remains the same.<br /> <br /> So my question is do you guys and gals think this is releated to the Appe propietary temperature sensor or something else_ maybe a faulty HDD (although SMART says is OK).<br /> <br /> Is funny because both are Apple OEM Seagate basically the same model. And the 1TB one is Brand new, one might think that if Apple is pushing it´s temperature sensor all the new HDD should have the same technology.

Device:

iMac mid 2011 21.5 IncIntel 21.5" EMC 2428
iMac mid 2011 21.5 IncIntel 21.5" EMC 2428

Tags:

upgrade HD, fan speed increase, swapping hardware, compatible hardware

Status:

open

Edit by machead3,

Title:

Hard Drive Fans slowly increasing speed

Text:

Hello everyone, in short I have two 21.5 inch iMacs, one from 2010 and a new one from mid 2011. I damaged the old one and bought the new one. The old one has a 1TB HD and the new 500GB. The old one receive a Brand new OEM HDD from Apple thanks to the hard drive replacement program. I tried to swap hard drives and they worked fine until about 30 40 minutes when the hard drive fan started to spin really fast and noisy of course. I did an SMC PRAM restart, repaired permissions, updated OSX and the problem keept going.<br /> <br /> I read in some other place about the issue with Apple´s propietary temperature sensor but all I have read is that the fans start to spin really fast as soon as one turn on the computer and in my case it takes some time. I even installed SMCFancontrol to reduce the speed but there is no change, the speed remains the same.<br /> <br /> So my question is do you guys and gals think this is releated to the Appe propietary temperature sensor or something else_ maybe a faulty HDD (although SMART says is OK).<br /> <br /> Is funny because both are Apple OEM Seagate basically the same model. And the 1TB one is Brand new, one might think that if Apple is pushing it´s temperature sensor all the new HDD should have the same technology.

Device:

iMac mid 2011 21.5 Inc

Tags:

fanupgrade HD, fan speed increaseincrease, swapping hardware, compatible hardware
fanupgrade HD, fan speed increaseincrease, swapping hardware, compatible hardware

Status:

open

Original post by jigzat,

Title:

Hard Drive Fans slowly increasing speed

Text:

Hello everyone, in short I have two 21.5 inch iMacs, one from 2010 and a new one from mid 2011. I damaged the old one and bought the new one. The old one has a 1TB HD and the new 500GB. The old one receive a Brand new OEM HDD from Apple thanks to the hard drive replacement program. I tried to swap hard drives and they worked fine until about 30 40 minutes when the hard drive fan started to spin really fast and noisy of course. I did an SMC PRAM restart, repaired permissions, updated OSX and the problem keept going.<br /> <br /> I read in some other place about the issue with Apple´s propietary temperature sensor but all I have read is that the fans start to spin really fast as soon as one turn on the computer and in my case it takes some time. I even installed SMCFancontrol to reduce the speed but there is no change, the speed remains the same.<br /> <br /> So my question is do you guys and gals think this is releated to the Appe propietary temperature sensor or something else_ maybe a faulty HDD (although SMART says is OK).<br /> <br /> Is funny because both are Apple OEM Seagate basically the same model. And the 1TB one is Brand new, one might think that if Apple is pushing it´s temperature sensor all the new HDD should have the same technology.

Device:

iMac mid 2011 21.5 Inc

Tags:

fan speed increase

Status:

open