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Install programs to ssd on mac fusion drive for faster performance free#
Install programs to ssd on mac fusion drive for faster performance windows#

All other files and the Boot Camp partition go to the SATA SSD (just like they did before with the HDD).

macOS and frequently used files are stored on (or dynamically moved to) the Apple SSD.

Starting over from scratch, how can I create a Fusion Drive with the two SSDs that behaves like it is supposed to?

Install programs to ssd on mac fusion drive for faster performance windows#

The Boot Camp partition has been created on the Apple SSD while the SATA SSD appears to be the boot volume! Windows located on the Apple SSD is particularly unexpected since with the original configuration, Boot Camp could only access the HDD portion of the Fusion Drive.

Install programs to ssd on mac fusion drive for faster performance free#

Everything appeared to be just fine until I arrived at installing Windows: Boot Camp would only let me use 110 GB for the new partition despite one TB of free disk space.Īnother look at the drive configuration revealed that something has gone terribly wrong after all:Ģ: Apple_CoreStorage Macintosh HD 24.5 GB disk0s2ģ: Apple_Boot Recovery HD 650.0 MB disk0s3Ĥ: Microsoft Basic Data BOOTCAMP 96.0 GB disk0s4Ģ: Apple_CoreStorage Macintosh HD 2.0 TB disk1s2 I then installed macOS High Sierra with no issues and migrated my data from a Time Machine backup.

Using diskutil, I unmounted the Fusion Drive, erased each of the physical disks, created a new CoreStorage Fusion Group ( diskutil cs create "Macintosh HD" disk0 disk1) and then a CoreStorage Fusion volume ( diskutil cs createVolume "Macintosh HD" JHFS+ "Macintosh HD" 100%). Since the 128 GB M.2 Apple SSD is probably still a lot faster than the new SSD, I wanted the two drives to operate in "fusion mode" once again, rather than have two separate volumes. The HDD in my 3 TB Fusion Drive has died, so I replaced it with a 2 TB SATA-SSD. The effect of splitting data between two drives is that both need to be connected to a Mac (which must be running OS X 10.8.2) in order to read it.I own a 27-inch late 2012 iMac.

Stein discovered if he read the first megabyte of a large file enough to warrant storing it on the flash storage, only that portion of the file was moved. He discovered Fusion Drive works at a lower level, instead moving the blocks that make up files, and only some of them. That would be inefficient, so Fusion Drive doesn't have to shift the whole of a file.Ī developer, Patrick Stein, has published blog posts examining the working of Apple's technology. Very large files, such as videos or an iPhoto library aren't treated as monolithic. The operating system stays on the SSD, but pre-installed apps such as iMovie and GarageBand don't enjoy this privilege. Something else will end up relegated to the slower drive instead. OS X continues to monitor your activity, and if it discerns you're using something enough to warrant moving it back to the faster storage, it will do so. Relegation to the hard drive isn't a one-way or irreversible. Best Mac RAID drive 2013: 6 reviewed and rated.This keeps plenty of flash storage available so that high performance is maintained. When free flash storage dwindles to only 4GB, OS X's long-term observations are used to decide what you're least likely to need from day to day, and it moves some of it to the hard drive. Behind the scenes, OS X silently monitors how your Mac is used.