Questions tagged [fusion-drive]

Apple's branding of a tiered storage solution where an SSD and HDD are combined using core storage to appear as one fast and spacious drive.

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votes
4answers
73k views

I think I messed up the Fusion Drive on my 1TB iMac (with BootCamp)

this is a somewhat similar post to this one (Can't create partition on free space with Disk Utility) but not quite... It started with me creating a BootCamp partition (around 145 GB) for Windows ...
54
votes
6answers
22k views

Can I make a DIY Fusion Drive?

I have a Mac Mini with two drives: a 256GB SSD and a 500GB HDD. From what I've read, the new Fusion Drive does all of it's magic in software, using the Core Storage APIs. Can I get my setup to ...
5
votes
1answer
3k views

iMac disk partion FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF and fusion drive unlinked

I was trying to uninstall linux mint and was trying to restore the partitions back to one. Somehow I ended with the one of the partition labeled FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF. This are the ...
3
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5answers
3k views

Can not delete Free Space on iMac 5K: Partition doesn't appear in CS list

I recently tried to install a bootcamp instance of Win 8.1. The install failed for some reason (wasn't clear from the error message). This left me with an unaddressable partition. I erased that ...
1
vote
1answer
8k views

Boot camp does not boot after El Capitan update

I have a 2008 Macbook 5,1 (aluminium unibody). I had Bootcamp on it. Then, I replaced the DVD with a SSD and made a DIY fusion drive. It was working properly until this year's May, when I cloned the "...
10
votes
6answers
21k views

DIY Fusion Drive: Adding Recovery HD to a CoreStorage Volume Group

After creating a "DIY Fusion Drive" using the methods below in 10.8, I'm now wondering how to add a RecoveryHD partition to the internal drive. Here's what I did to create a Logical Volume Group ...
5
votes
1answer
2k views

DIY Fusion drive with 3 drives

Is it possible to build a DIY Fusion drive using 3 drives - 2 HD's and 1 SSD? Will the Fusion machinery optimise on three levels i.e. SSD, then fast HD, then slow HD? I have a mid 2011 27" iMac, ...
1
vote
4answers
413 views

Is it worth unsplitting my fusion drive?

I was messing around with my iMac and got to a point where I had to reinstall the OS, but it turned out the Fusion Drive had split into a 1 TB hard drive and a 24 GB flash drive. After looking around ...
28
votes
2answers
27k views

How to determine which files are on SSD on Fusion Drive?

My question is: How can i determine which files are on the SSD "partition" on Fusion Drive? I have an iMac with 1TB Fusion Drive, and it would be good to know which apps or data are on which ...
4
votes
1answer
2k views

How do I re-fuse an unfused Fusion Drive, ideally without formatting?

I have a 5k iMac with a Fusion Drive. I had trouble with macOS, so I reinstalled it, and restored from a Time Machine backup using Migration Assistant. After that, the system has been very slow, and ...
3
votes
3answers
623 views

How to install or port data to a Fusion / Hybrid / SSHD drive

I have a late 2012 Mac mini that came with a 500 GB HDD installed from the factory. It's almost full so I want to upgrade it to a 1 TB Fusion Drive, as the cost for a 1 TB SSD is still steep. The Mac ...
4
votes
1answer
2k views

Fusion Drive: free space on SSD

Is there a possibility to find out how much storage is free on a SSD of a Fusion Drive disk (SSD + HDD as a logical device)? The structure I use is this one here: $ diskutil list /dev/disk0 #: ...
3
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2answers
2k views

Is there a way to change order of physical disks in Corestorage

I upgraded existing system to a "Fusion drive" - corestorage volume - consisting of existing 300GB HDD and new 120GB SSD. Instead of creating a new corestorage drive I went with the route of ...
1
vote
1answer
5k views

Fusion Drive seems to be messed up

I felt that my iMac late 2012 became pretty slow, above all after login. Now when I look into disk utility, it seems that my disk doesn't behave as Fusion Drive any more: An output from terminal: ➜ ...
0
votes
2answers
537 views

Fix a DIY Fusion Drive

A few weeks ago, I took out my early 2011 13-inch MBP's optical drive, put my 500GB HDD in the optical drive area, put a 120GB SSD where the HDD used to live, and made a DIY Fusion Drive according to ...
3
votes
2answers
5k views

Boot Camp does not boot after disk cloning

I've got a MacBook5,1, and I replaced the CD drive with a SSD. Then, I made a "DIY fusion drive". Before doing it, I was using the regular setup, with Boot Camp. Then I put the SSD and made the Fusion ...
3
votes
2answers
2k views

how to prepare two SSDs after upgrade (merge to fusion drive or not, terminal commands)

I just upgraded the CPU of my 2015 27" Retina iMac and while I was in there I took out the 1TB HDD and replaced it with a 512GB Samsung 850 Pro SSD. Now I'm ready to set it all up, but I'm not sure ...
2
votes
2answers
447 views

Does MacOS Support a Snapshot-Style Filesystem?

I would like to perform daily snapshots that I can revert to if someone: downloads Malware installs buggy software etc. Does such a thing exist? Is there a roadmap for it? I have a Fusion drive ...
2
votes
0answers
2k views

How to access a fusion drive from ubuntu linux by mounting apple core storage

my iMac with 3TB fusion drive won't boot anymore. even when booting to recovery it crashes with kernel panic. the stack trace says com.apple.driver.Corestorage dependency com.apple.iokit....
1
vote
1answer
145 views

How to reformat a HDD to show the proper size?

Long story short. On my iMac I had a Fusion Drive: 250GB SSD + 750GB HDD. The SSD failed totally, is completely dead. HDD seems to be OK. I replaced the SSD and erased the HDD. The HDD seems to be ...
1
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3answers
13k views

“No Bootable Device” after failed Boot Camp installation (Windows 8 - 1TB Fusion Drive)

On my new iMac /w a 1TB Fusion Drive, I tried to install Windows 8 (still technically unsupported) using the following method: http://arstechnica.com/information-technology/2012/11/no-support-no-...
1
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2answers
3k views

Windows will not boot to my boot camp partition on a DIY fusion drive - gives “No bootable device found” error

I have a MacBookPro 9,1 (mid-2012, non-retina) running OS X 10.8.2. Here is what I have done to my system: Installed Windows 7 x64 Pro to a boot camp partition; installed all windows updates. Using ...
0
votes
1answer
1k views

Problem Installing Windows 7 via Boot Camp

I've recently created a DIY Fusion drive (240GB SSD & 1TB HDD) using the core storage commands on my mid 2012 MacBook Pro, I've restored from a time machine backup and everything works great. Now ...
0
votes
2answers
2k views

Reusing iMac Fusion Drive as external drive

The logic board of my iMac 27" Retina broke and I find it impossible to get a new one in the country where I'm living in. I wonder if it's possible to access the data in the Fusion hard drive, ...