Fusion Drive is a block-level solution based on Apple's Core Storage, a logical volume manager managing multiple physical devices.A number of speculations are available but not completely confirmed. Several experimental studies have been conducted to speculate about the internal mechanism of Fusion Drive. During idle periods, data is adaptively migrated to the most suitable device to provide sustained data processing performance for users. Data movement is based on access patterns: if data has been on the HDD and suddenly becomes frequently accessed, it will usually get moved to the SSD by the program controlling the Fusion Drive.More frequently accessed data is stored on the SSD and the larger, less frequently accessed data stored on the HDD.A portion of SSD space is used as a write-back buffer to absorb incoming write traffic, which hides perceivable latencies and boosts write performance.The SSD and the hard drive are logically merged into a single block device managed by the operating system, which is independent of file systems and requires no changes to applications.According to the paper, this hybrid storage system unifies a high-speed SSD and a large-capacity hard drive with several design considerations of which one has been used in the Fusion Drive. It has been reported that the design of Fusion Drive has been influenced by a research project called Hystor. Supported products have the following configurations:Īpple's Fusion Drive design incorporates proprietary features with limited documentation.
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As of July 2021, only the 21.5 inch iMac offers a Fusion Drive as an upgrade over the standard SSD.
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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.
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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. We also offer up to a 3-year Mac Mini warranty from our partner SafeTechWarranty.Some of this article's listed sources may not be reliable. Rest assured, each Mac offers 30-day returns and a 90-Day Warranty. Each component is tested to ensure that you'll get a Mac that lasts you years. We have a wide variety of processors ranging from i5, i7, & i9.ĭuring the refurbishment process, we stress test every Mac Mini to make sure they are fully functional and meet modern standards. The Mac Mini is great for professionals and power users featuring the newest generations of Intel and M1 processors. was created to help people understand the differences in Mac Mini models in order to make an educated buying decision. Live Tech Support w/ Real Techs that Actually Fix IssuesĮach Mac Mini Ships within 24 Business Hoursīuying a refurbished Mac Mini shouldn't be a confusing or dangerous process.
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