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Macs Fan Control makes HDD sound like a clock

Control fans on Apple hardware: iMacs, Macbooks, etc

Moderator: Steven

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pressurecooker
Posts: 5
Joined: 26 Jun 2017, 11:50

Macs Fan Control makes HDD sound like a clock

Post by pressurecooker »

Just as the subject says, when MFC is running my iMac's HDD clicks continuously, tick-tock, tick-tock, all the time, about one tick-tock per second.

iostat doesn't show any actual disk transfers every second, so I'm wondering what this noise is, and whether it could be prevented/removed?

Thanks!
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Steven
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Re: Macs Fan Control makes HDD sound like a clock

Post by Steven »

Dear sir,

Thank you for the report. It happens because MFC reads HDD temperature from SMART. User must be able to disable reading of HDD sensors.
Just added this into the TODO list
pressurecooker
Posts: 5
Joined: 26 Jun 2017, 11:50

Re: Macs Fan Control makes HDD sound like a clock

Post by pressurecooker »

Thank you.

Reducing the frequency to once a minute would help, too.

Strange that the HDD makes sounds like a seek operation when all you read is the temperature. Do they all behave like that?
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Steven
CrystalIDEA Developer
Posts: 2294
Joined: 21 Dec 2009, 11:48
Location: CrystalIDEA headquarters
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Re: Macs Fan Control makes HDD sound like a clock

Post by Steven »

This is strange, normally it shouldn't be like that.
pressurecooker
Posts: 5
Joined: 26 Jun 2017, 11:50

Re: Macs Fan Control makes HDD sound like a clock

Post by pressurecooker »

Double checked, logging is disabled in the preferences, and the ticking continues only when MFC is open, and even when iostat 1 shows 0 transactions per second for multiple seconds. It is strange.
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