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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Salvage data from fusion drive

I have a 2015 iMac 27 inch that had a fusion drive. I recently replaced the fusion drive with a SSD drive. It seems that my iMac had two storages. One is an 128GB SSD drive connected via PCI and a ...
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505 views

Moving just MacOS from HDD to SSD

I have an iMac with a fusion drive. A while back, the drive separated into two seperate drives, with one OS on both the SSD and HDD each. The Apple Technician was unable to help me to join them again ...
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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, ...
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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 ...
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iMacs Fusion Drive: only SSD listed, no HDD

I had some problems with a Mac's Fusion Drive. I erased the first MB of the SDD (Terminal in recovery mode). After that I partitioned the SDD again (with GUID). That works. But the HDD is now missing. ...
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54 views

How do I consolidate all my partitions into one partition usable for Bootcamp?

I've been having an issue with Bootcamp recently after I deleted my Windows disk due to a driver issue that was unfixable. I figured I would just do a fresh install of Windows, but little to my ...
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793 views

FileVault 2 encrypted Fusion Drive on iMac doesn't boot anymore

I bought a 2017 iMac, migrated the contents of my 2012 iMac (so I have my data! ) and I wanted to erase the 2012 iMac it replaces using Disk Utility in Recovery Mode. I had hoped this would be a ...
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1answer
554 views

Hard Drive I replaced still showing up in Disk Utility and as a Startup Disk

I have a late 2012 Mac Mini running macOS Sierra (10.12.6). It came with a 1TB fusion drive. I recently removed that drive to replace it with a 960GB SSD. All is working fine except for two issues. ...
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Unable to unpartition main hard drive [duplicate]

I have a late 2013 27 inch iMac with a 3 TB Fusion Drive with macOS Sierra installed. I partitioned my drive right down the middle, so 1.5 TB on either side. When I went into Disk Utility mode to ...
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476 views

3 TB Fusion Drive missing space after unsuccessful Windows installation via Bootcamp

I have been trying to install Windows via Bootcamp on my iMac (Retina 5K, 27-inch, 2017, 3 TB Fusion Drive; Mac OS 10.12.6) and messed up. Here are the steps taken so far: Ran Bootcamp and ...
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900 views

Is there a way to rescue the contents of this messed up Fusion Drive?

I got a Mac in to support with a weird problem with a Fusion Drive. Basically it looks like this admins-iMac:~ admin$ diskutil corestorage list CoreStorage logical volume groups (1 found) | +-- ...
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Data Recovery options for iMac late 2013 1 TB Fusion Drive

My friend's iMac crashed. He took it to an Apple Store and they said the 1 TB HDD was failing. They got him to boot off an external and told him to go home back his stuff up and they can order and ...
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449 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 ...
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1answer
4k views

Replace Hard Drive in iMac with Fusion

We have a Late 2012 iMac in the shop that needs the 3TB hard drive replaced. Turns out this model has a Fusion drive with an SSD that is on the backside of the logic board. The drive has been swapped ...
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How can I fix or restore my 3TB Fusion Drive macOS install after Boot Camp partitioning error?

What I have: - 27" 2012 Mac with 3TB Fusion Drive - 3.4 GHz Core i7 (3770) ("Ivy Bridge") processor - 24 GB RAM I was trying to set it up with a Boot Camp partition for Windows 10. The story so ...
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624 views

Disk Utility Partitions Wrong Part of Fusion Drive

I have a question about my iMac 2015 Fusion Drive. I replaced my spindle with a SATA SSD 512gb drive. Here are the commands I used from an online instruction set to remake the Fusion Drive: diskutil ...
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285 views

Merge existing HDD and SSD into Fusion drive

Some time ago I split the Fusion Drive into 2 parts, SSD and HDD accordingly. Now I decided to return to fusion drive, but I have some data that I would like to keep. Is it possible to merge drives ...
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1answer
419 views

What should I do about a Mac Mini whose fusion drive is getting steadily slower and slower?

I have a 2012 Mac Mini (running OS/X 10.11.6) with an Apple-provided internal 1TB fusion drive that appears to be suffering from some kind of performance problem -- it seems to be getting slower and ...
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1answer
3k views

Can CCC clone a Fusion drive and restore it to a new SSD?

I have a 2012 Mac Mini with a 1TB Fusion drive. The noise of the spinning disk has been increasing lately and I want to replace it with a Crucial MX300 1TB SSD. Carbon Copy Cloner makes a complete ...
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1answer
198 views

Swap Fusion Drive for SSD

I want to swap my Fusion Drive for a 1 TB SSD, to gain more speed loading programs. Do I have to delete (uninstall) the Fusion Drive first or can I just take out the HD and install the SSD and then ...
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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 ...
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590 views

Cannot boot from usb

Recently I replaced the optical drive to SSD to make a fusion drive in my Macbook Pro 13 inch 2012. The hardware installation was successful and it is recognized in Disk Utility. I made a Sierra ...
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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 ...
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1answer
741 views

I can t find my internal HDD drive (part of fusion drive) on iMac 27 late 2012

Hello as I wrote on the title I have an issue with my fusion drive .. After entering internet recovery mode I only see the SSD ... Here is the photo also from my diskutil list and diskutil cs list : ...
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2k views

Fusion Drive - Lost space when resizing

I'm having trouble with my Fusion Drive. I was trying to reclaim a 100gb partition that I used BootCamp for. I was unable to delete the BootCamp partition using the Assistant, so I used the Utility ...
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877 views

My Fusion Drive unlinked in two pieces (SSD+HDD) and I want to restore it again in one piece

i have an iMac 27′ late 2012 and I have a problem with my Fusion Drive … suddenly the SSD part and the HDD unlinked and now i have two separate disks .. I ran in Terminal: diskutil list and diskutil ...
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37 views

3TB Fusiondrive split, Need help

My Fusiondrive has split and I really need your help. I made a backup and I am ready to delete everything clear slate. How can I get everything fixed? Thanks a lot for your help. diskutil list /dev/...
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625 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 ...
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Alignment errors on Fusion Drive caused by differing block sizes?

I have some alignment errors on my Fusion Drive after? reorder the CoreStorage. For some weeks ago I got my purchased iMac 27 and made out, that the index order of the SSD and HDD drives are wrong. ...
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1answer
408 views

Hard drive for Fusion drive: 7200 vs 5400 [closed]

I have a Mac Mini 2012 with 128 GB SSD on board. I want to buy an additional 1TB hard drive and transform the storage to Fusion Drive. My Mac use case is running Virtual Machines and Docker ...
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1answer
295 views

Can't boot my MacBook Pro with Fusion Drive

I have checked almost all the "messed up the fusion drive" posts and don't find any close one to my situation, so I decide to ask a question and hope someone can help me, especially @klanomath :) ...
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2k views

Messed up 1TB Fusion Drive Partitions (on iMac 5K) - 100% Disk Space used

my I'Mac 5k won't boot. What happened: I did some image editing in photoshop and instead I resized the image to 1100px i typed 11000px. After this mistake i got the rainbow circle of death. I tried ...
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1answer
4k views

diskutil fails to fix Fusion Drive

My iMac suddenly stopped booting, failing to mount the disk at boot. Running diskutil repair fails with this error: bash-3.2# diskutil repairVolume disk3 Started file system repair on disk3 ...
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1answer
292 views

Fusion drive: replace SSD and HDD vice-versa

I've just made a Fusion Drive on my MBP 2012 and restored data from the Time Machine. Unfortunately, right now I read information that the best place for SSD is the main bay of HDD not the optical bay....
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717 views

Messed up my 1TB Fusion drive on my iMac with Disk Utility

Soooo something bad happened recently with my 1 TB Fusion drive on my 5K late 2015 iMac. I was creating a new 100 GB partition on my disk. So while the disk utility was busy scanning etc (doing its ...
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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 ...
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147 views

Problem when booting OS X from an external USB drive

I would like to create a Fusion Drive from my SSD and HDD both installed inside my MacBook Pro 15" Mid 2012. I've read an article online which said that in order to do that, I'd need to boot Mavericks ...
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1answer
336 views

Fusion drive suddenly not bootable: “Too few free segments”, made read-only

I've dealt with a lot of disk issues over the years admining lots of different OSs, but this one is new to me... help/ideas appreciated before I give up and restore! Woke up this morning to my iMac (...
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Missing space on Fusion Drive (partition problem)

I know this or similar problems have been discussed, but (to be honest) I can't see the trees for the wood. I tried to create a partition on my fusion drive (1TB Hd + 240 MB SSD). No partition was ...
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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, ...
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699 views

Fusion Drive lost space after bootcamp-fail. resizeStack throws an error. What can I do?

I have a 2 TB Fusion Drive in a 5K iMac (Late 2015). Two days ago, I started the bootcamp assistant to create a partition for Windows 10. It got stuck (let it run 30 minutes), however, which forced me ...
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3k views

Fusion drive is not working although the system can find the SSD

I own an iMac late 2013 with a fusion drive. Recently I installed Windows 8.1 using Bootcamp on a separate partition on my disk. After a few days, the booting process of OS X started failing and I had ...
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1k views

Problem with 3 TB Fusion Drive, it can't be deleted, formatted or partitioned

I want to clarify that I already followed the instruction with I think I messed up the Fusion Drive on my 1TB iMac (with BootCamp) but I think I have mayor problems. I followed the instructions to '...
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Not able to restore my 3TB fusion drive late 2013 iMac

Last weekend my iMac started to act in a very strange way. While I was working, my Mac was very slow and the mouse and keyboard didn't respond very well. So I decided to reboot because having two ...
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Add SD card to Fusion Drive in MacBook Pro 12,1

I want to know if it's possible to add a 128 GB SD card to my MacBook Pro 12,1 (13-inch Retina, early 2015) and make 250 GB Fusion drive. $ sudo diskutil list /dev/disk0 (internal, physical): #: ...
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Can't delete Logical Volume Group on Fusion drive

I have a 2014 iMac Retina running OS X Yosemite and a 3TB Fusion drive. I am attempting to restore it from a Time Machine backup, but when I try to do so, I get the error message, "The disk can't be ...
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3k views

I think I messed up the Fusion Drive on my 2TB iMac

I want to ask you how can I get back together my Fusion Drive (merge HDD and SSD together). I was installing Windows 10 and during installation it crashed and I was not able to boot in Windows neither ...
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655 views

Reuse an iMac's fusion drive?

I have a 2013 iMac with a broken logic board and display. It's too expensive to repair, but I'd like to salvage the fusion drive. If I put the drive in an external case will it work?
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703 views

Use SSD partition on Mac Mini Fusion Drive through Windows Bootcamp

I've been checking through so many questions here, a lot of forum posts, and I can't get a clear answer to what it is I think I want to do. I bought the fusion drive because well...SSD...I added a ...
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358 views

What's wrong with my Fusion Drive?

I'm having weird issues with my internal Fusion Drive. Symptoms: It gave itself a new cryptical name, and I can't change it back In most cases I cannot install new software anymore (e.g. I cannot ...