As of November 2021, no Mac offers a fusion drive.Īpple's Fusion Drive design incorporates proprietary features with limited documentation.
Fusion Drive remains available in subsequent models of these computers, but was not expanded to other Apple devices: the latest MacBook and Mac Pro models use exclusively flash storage, and while this was an optional upgrade for the mid-2012 non-Retina MacBook Pro discontinued by Apple, it will replace the standard hard disk drive instead of complementing it in the fashion of Fusion Drive. The Fusion Drive was announced as part of an Apple event held on October 23, 2012, with the first supporting products being two desktops: the iMac and Mac Mini with OS X Mountain Lion released in late 2012. In software, this logical volume speeds up performance of the computer by performing both caching for faster writes and auto tiering for faster reads.
For example, if spreadsheet software is used often, the software will be moved to the flash storage for faster user access. The operating system automatically manages the contents of the drive so the most frequently accessed files are stored on the faster flash storage, while infrequently used items move to or stay on the hard drive. Apple's implementation combines a hard disk drive with a NAND flash storage ( solid-state drive of 24 GB or more) and presents it as a single Core Storage managed logical volume with the space of both drives combined. ( January 2015) ( Learn how and when to remove this template message)įusion Drive is Apple Inc's implementation of a hybrid drive. Unreliable citations may be challenged or deleted. Please help this article by looking for better, more reliable sources.
HDD Fan Control works to fix this issue by reading the drives internal temperature using the S.M.A.R.T protocol and set the fans actual speed to a value good to protect the drive.Some of this article's listed sources may not be reliable.
Instead of HDDFan Control, get the free SSDFan Control It runs at startup and continually to always control the fan correctly, prevent the loud fan noise and protect the drive from overheating HDD Fan Control works to fix this issue by reading the drives internal temperature using the S.M.A.R.T protocol and set the fans actual speed to a value good to protect the drive. These programs will not work for this particular issue as they often only control the base speed, and if they do control the fans actual speed they rely on the temperature reported by the sensor which is now incorrect.
If you replace your drive, your iMac will initially seem fine, but soon the fan will begin to speed up to full speed. This is due to Apple replacing the external Hard Drive temperature sensor with a proprietary firmware and using the drives internal sensor. Replacement drives do not contain the firmware to deliver temperature data on the temperature sensor cable. When the iMac does not receive a good signal from the hard drive it puts the fan at full speed to protect the drive. Since the late 2009 iMacs came out, replacing the hard drive has caused the internal Hard Drive Fan to start running at around 6000RPM.
Hi, likely the new Drive doesn't have the Termal sensor.