Apple Mac mini, 2.8GHz Intel Core i5 Dual Core, 8GB RAM, 1TB Fusion Drive, Mac OS, Silver, MGEQ2LL/A (Newest Version) (Renewed) 4.0 out of 5 stars 20 $709.87 $ 709. Apple Mac Mini 2012 Model - In very good condition, small marks of wear and tear but fully functional. Details about Apple Mac Mini 2012 i7 - Fusion Drive - Good Condition See original listing. Apple Mac Mini 2012 i7 - Fusion Drive - Good Condition: Condition: Used. Programs repeatedly crashing on my late 2012 Mac Mini Fusion Drive. I have a late 2012 Mac Mini Fusion Drive 2.6ghz, 16gig RAM running Mac OSX 10.9.4. For the past week or so I have had a number of programs - both Apple and third party apps crash repeatedly, I have repaired permissions and restarted numerous times but nothing seems to fix it. Make Offer - Apple Mac Mini 2014/8Gb/2.8Ghz/Intel i5/1TB Fusion hard drive/keyboard/trackpad. MAC MINI [email protected] 8GB DDR3 1600 RAM 60GB/500GB FUSION DRIVE + POWER CORD $550.00.
Fusion Drive is Apple Inc's implementation of a hybrid drive. Apple's implementation combines a hard disk drive with a NAND flash storage (solid-state drive of 24 GB or more)[1] and presents it as a single Core Storage managed logical volume with the space of both drives combined.[2]
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.[3] For example, if spreadsheet software is used often, the software will be moved to the flash storage for faster user access. In software, this logical volume speeds up performance of the computer by performing both caching for faster writes and auto tiering for faster reads.
Availability[edit]
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.[3] 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. Supported products have the following configurations:
Release date | HDD storage | Flash storage | |
---|---|---|---|
Mac Mini | Late 2012 | 1 TB | 128 GB |
Late 2014 | |||
iMac (all models) | Late 2012 | ||
Late 2013 | |||
2014 | |||
iMac (27-inch non-Retina) | Late 2012 | 3 TB | |
Late 2013 | |||
iMac (27-inch Retina) | Late 2014 | ||
Mid-2015 | |||
iMac | Late 2015 | 1 TB | 24 GB |
2 TB | 128 GB | ||
Mid 2017 | 1 TB | 32 GB | |
2 TB | 128 GB | ||
3 TB | |||
Early 2019 | 1 TB | 32 GB | |
2 TB | 128 GB | ||
3 TB | |||
iMac (21.5-inch) | Late 2020 | 1 TB | 32 GB |
Design[edit]
![Mac Mac](/uploads/1/1/8/0/118013762/913740624.jpg)
Apple's Fusion Drive design incorporates proprietary features with limited documentation. It has been reported that the design of Fusion Drive has been influenced by a research project called Hystor.[4] According to the paper,[5] 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.
- 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.
- 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.
- More frequently accessed data is stored on the SSD and the larger, less frequently accessed data stored on the HDD.
- 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. During idle periods, data is adaptively migrated to the most suitable device to provide sustained data processing performance for users.
Several experimental studies[3][6][7][8][9][10] have been conducted to speculate about the internal mechanism of Fusion Drive. A number of speculations are available but not completely confirmed.
- Fusion Drive is a block-level solution based on Apple's Core Storage, a logical volume manager managing multiple physical devices.[6][7] The capacity of a Fusion Drive is confirmed to be the sum of two devices.[6][7] Fusion Drive is file system agnostic and effective for both HFS Plus and ZFS.[8]
- Part of the SSD space is used as a write buffer for incoming writes.[6][7] In the stable state, a minimum 4 GB space is reserved for buffering writes.[3][6][7] A small spare area is set aside on the SSD for performance consistency.[7]
- Data is promoted to the SSD based on its access frequency.[6][7] The frequency is detected at the block level [9] and below file system memory cache.[10] Data migration happens in 128 KB chunks during idle or light I/O periods.[6][7]
- Operating system and other critical documents are always cached on the SSD.[6] Applications are likely to be handled similarly.[7] A regular file can reside on both devices.[9]
See also[edit]
- bcache, dm-cache, and Flashcache on Linux
- Smart Response Technology — a similar technology from Intel (for desktops)
- ExpressCache — used on a number of Wintel laptops
- ZFS - A file system using similar technology
References[edit]
- ^Dominguez, Alberto (3 January 2019). 'The best desktop computers of 2018'. Pandora FMS. Archived from the original(html) on 3 January 2019. Retrieved 3 January 2019.
- ^Hutchinson, Lee (October 23, 2012). 'Apple Fusion Drive—wait, what? How does this work?'. Ars Technica. Condé Nast. Retrieved October 25, 2012.
- ^ abcdShimpi, Anand Lal (October 24, 2012). 'Understanding Apple's Fusion Drive'. AnandTech. Retrieved October 25, 2012.
- ^'Computer Science Research at Ohio State Makes Impact in Apple's Hybrid Storage Product'. www.cse.ohio-state.edu. 2013-04-08.
- ^'Hystor | Proceedings of the international conference on Supercomputing'. doi:10.1145/1995896.1995902. S2CID207188516.Cite journal requires
|journal=
(help) - ^ abcdefgh'Achieving fusion—with a service training doc, Ars tears open Apple's Fusion Drive'. www.arstechnica.com. 2012-11-05.
- ^ abcdefghi'A Month with Apple's Fusion Drive'. www.anandtech.com. 2013-01-18.
- ^ ab'Fusion Drive - loose ends'. jolly.jinx.de/. 2012-10-31.[unreliable source?]
- ^ abc'More on BYO Fusion drive'. jolly.jinx.de/. 2012-10-31.[unreliable source?]
- ^ ab'Fusion Drive last words'. jolly.jinx.de/. 2012-11-04.[unreliable source?]
Fusion Drive For Mac Mini 2012 Manual
External links[edit]
![Fusion Drive For Mac Mini 2012 Fusion Drive For Mac Mini 2012](/uploads/1/1/8/0/118013762/543742084.png)
- Fusion Drive – Apple's description
- Fusion Drive – Apple Knowledge Base article
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Fusion_Drive&oldid=978075993'
Flac to cd audio for mac os. Fusion Drive, a storage option on some iMac and Mac mini computers, combines a hard drive and flash storage in a single volume for improved performance and storage capacity. If your Fusion Drive appears as two drives instead of one in the Finder, it's no longer working as a Fusion Drive. This can happen after replacing either drive of your Fusion Drive, or using software to intentionally split them into separate volumes.
You can continue using the two drives independently, or follow these steps to regain the benefits of having the single logical volume of a Fusion Drive.
Before you begin
If you're not sure that your Mac was configured with a Fusion Drive, or that the drive has been split:
- Disconnect any external storage devices from your Mac.
- Choose Apple menu > About This Mac, then click Storage.
- If you see a drive labeled Fusion Drive, your Fusion Drive is working and this article doesn't apply to you.
- If you have a Fusion Drive that has been split, you should see two drives. One of them should be labeled Flash Storage, with a capacity of 24GB, 32GB, or 128GB. The other should be at least 1TB.
Use Terminal to create a Fusion Drive again
These steps permanently delete all data stored on the drives that make up your Fusion Drive. Make sure that you have a backup before continuing.
If you're using macOS Mojave or later
- Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery. Release the keys when you see the Apple logo or spinning globe.
- When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
- Type
diskutil resetFusion
in the Terminal window, then press Return. - Type
Yes
(with a capital Y) when prompted, then press Return. - When Terminal indicates that the operation was successful, quit Terminal to return to the macOS Utilities window.
- Choose Reinstall macOS, then follow the onscreen instructions to reinstall the Mac operating system. Your Mac restarts from your Fusion Drive when done.
If you're using macOS High Sierra or earlier
Mac Fusion Drive Vs Ssd
- Turn on your Mac, then immediately press and hold Command-R to start up from macOS Recovery. Release the keys you see the Apple logo or spinning globe.
- When you see the macOS Utilities window, choose Utilities > Terminal from the menu bar.
- Type
diskutil list
in the Terminal window, then press Return. - Terminal displays a table of data about your drives. In the IDENTIFIER column, find the identifier for each of the two internal, physical drives that make up your Fusion Drive. Usually the identifiers are disk0 and disk1. One of them should be 128GB or less in size. The other at least 1TB in size.
- Type the following command, replacing identifier1 and identifier2 with the identifiers you found in the previous step. Then press Return.Example: diskutil cs create Macintosh HD disk0 disk1
- If you get a disk unmounting error, enter
diskutil unmountDisk identifier
, using the first identifier you gathered previously. Then enter same command again using the second identifier. Then retry the command in step 5. - Type
diskutil cs list
, then press Return. - Terminal displays additional data about your drives (volumes). Find the string of numbers that appears after ”Logical Volume Group” for the volume named Macintosh HD. It's a number like 8354AFC3-BF97-4589-A407-25453FD2815A.
Example:
+-- Logical Volume Group 8354AFC3-BF97-4589-A407-25453FD2815A
|
| Name: Macintosh HD - Type the following command, replacing logicalvolumegroup with the number you found in the previous step. Then press Return.Example: diskutil cs createVolume 8354AFC3-BF97-4589-A407-25453FD2815A jhfs+ Macintosh HD 100%
- When Terminal indicates that the operation was successful, quit Terminal to return to the macOS Utilities window.
- Choose Reinstall macOS, then follow the onscreen instructions to reinstall the Mac operating system. Your Mac restarts from your Fusion Drive when done.