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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Recover data from fusion drive on late 2015 17 inch iMac which no longer displays (possibly burnt)

This time last Christmas my fusion hard drive stopped working. It had been loud and the back of the iMac (Retina 5K, 27-inch, Late 2015) was burned. After eventually installing the macOS onto the 121....
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Fusion Drive using external SSD & HDD

Coworker has an Acasis NVMe enclosure with a 1TB NVMe. Speeds are about 3000MB/s on USB4. The thing is that he has lying around a 8TB HDD 2.5 from an old PC. It would be awesome to use both as “Fusion ...
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Is iMac FusionDrive->dual SSD migration any different from HDD->SDD upgrade from Time Machine perspective?

I'm upgrading from FusionDrive to a regular drive (or a dual-drive setup). Is there any difference as compared to regular HDD -> SSD upgrade specifically in terms of inheriting pre-upgrade set of ...
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How to add/remove a physical disk to an existing apfs container

Here I have a "fusion" apfs container disk5 made from 2 partitions of physical disks. I want to add a new /dev/disk6 (/dev/disk6s2) which is a 8TB disk to be used in logical disk disk5. ...
VinD's user avatar
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How to create a Fusion drive that is not a Core Storage?

Edit I could find a solution to how recreate a fusion drive and a "Macintosh HD" volume so that OS X can be reinstalled. I suggest to people facing similar issue to simply read the answer ...
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Attempting to repair a split Fusion Drive

I attempted to activate FileVault on a late-2013 iMac, which has a 1TB Fusion Drive. However, the encryption process became stuck after several hours, so I had to reboot. This is when the issue ...
Abd's user avatar
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iMac Late 2012 Unable to boot. Fusion Drive APFS no HFS+

Reference old question: 2013 iMac with APFS Fusion Drive. Fails to boot. How to recover data? I have removed both the SSD drives from the iMac. Purchased a new Mac Mini M2 running macOS Ventura 13.3. ...
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How to correct the GPT of this non-booting fusion drive iMac?

Question renamed from: « Diagnosing what's going wrong with the fusion drive of an iMac 27'' 2019 A2115 EMC 3194 » after the origin of the problem could be located. Having a non-booting iMac using ...
OuzoPower's user avatar
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How can I recover files from a Fusion Drive if the iMac no longer works using an M1 Mac?

I have an iMac with a broken motherboard. I got the HDD out of it and I now want to view my files on my Mac M1 device. It shows my external device on Disk utility, but I'm unable to view the device ...
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How install MacOS on internal SSD (from fusion drive) and then use external SSD for applications?

I have a 2019 iMac 21.5" which has a 1TB fusion drive. But the HDD is getting old and slow (and it obviously wasn't fast to begin with). Until recently, I also had Windows Bootcamp installed on ...
Alfie Stoppani's user avatar
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My IMac 27 inch Late 2015 @ TB fusion drive is now a 2 TB SATA Drive?

My 2 TB Fusion drive has become a SATA Drive of 2 TB. I have an IMac 27 inch late 2015 with a 2 TB Fusion drive. After an update my computer crashed. I had to install the OS X from the OS that came ...
Cube's user avatar
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How to restore Fusion Drive backup to a new SSD alongside an existing blade SSD? (iMac 21.5 4k, late 2015)

My iMac 21.5 inch 4k (late 2015) has been abnormally slow during regular use, so I used Drive Dx to diagnose it. I get a "failing" status on the report, which is understandable. The first ...
bruteforce's user avatar
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Questions re modifying a Model 17,1 iMac running Mojave to remove the Fusion Drive

My 2015 (Model 17,1 w/OS X 10.14 Mojave) iMac was purchased new in 2017. It was a great system until its Fusion Drive failed. After two unsuccessful attempts to repair the Fusion Drive, I am now ...
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Fusion drive on iMac model 17,1, Mojave 10.14 - APFS or HFS+ format for HDD?

I have read that APFS was optimized for SSDs, but that it's not an optimal choice[ for HDDs. However, I just got my iMac (Model 17,1; OS X Mojave, 10.14) back from repair, and both drives are ...
Seamus's user avatar
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Accidentally deleted Fusion Drive SSD partition - need help recovering data

I accidentally formatted the SSD part of an APFS-formatted Fusion Drive during an SSD upgrade. Well, not accidentally, I did it on purpose wrongfully thinking that the Apple SSD wouldn't be needed ...
PCBOX Girona's user avatar
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macOS Monterey Boot Camp Assistant disk cannot be partitioned

I have a late 2015 iMac 27" - which previously had a 32Gb Fusion Drive and 1TB HDD... sometime ago I swapped out the 32Gb for a 1TB NVMe drive and the 1TB HDD for a 1TB SSD as i was dual booting ...
cerberus1845's user avatar
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How to restore split fusion drive backup to fusion drive

My second hand iMac 2017 retina 5k running OSX Catalina has always had a split fusion drive as seen in image attached and I have been using it like that for ages and backing up via time machine to ...
GUILTFILTER RECORDS's user avatar
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Fusion Drive split after removing the SSD and HDD from a iMac with a broken power supply / logicboard

Recently, my iMac just turned off and did not start anymore. After countless tries, I opened the iMac and removed the SSD and HHD (Fusion Drive) in the iMac in order to rescue my data. I am not really ...
user10802841's user avatar
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Is there any way to read fusion drive without mac?

I have used a fusion drive with one ssd and one hdd in mac mini mid 2011. However, my mac's logic board broke and I cannot even get into the bootable usb. I want to restore data from my drive. ...
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Why does my iMac have 4 drives

I have a 2017 iMac with fusiondrive, where the drive always have been really slow. I then got my 1TB HDD replaced with a SSD, but still the same. I also seems I have four drives now after I had to ...
Henrik Bjerring's user avatar
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Troubleshooting: iMac SSD appears then disappears

I have a 27" iMac (18,3) that originally came with a 2TB Fusion drive. Last week, the iMac started showing signs of HDD failure so I swapped out the main drive with an SSD from OWC. After ...
Anthony's user avatar
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How to Rebuild MacintoshHD to Reinstall MacOS from Bootable Drive? (iMac, 2017)

Model: iMac, 27 inch, Fusion Drive, 2017 Version: MacOS Monterey Beta (Version issues), MacOS Catalina (Version in bootable drive) Notes: I have a separate bootcamp Windows partition which works fine ...
Vikram's user avatar
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I mistakenly deleted the HD Data Partition in my 2019 iMac 2TB Fusion drive when trying to downgrade OS back to Mojave. Need help to get it back

I backed up whole drive with CCC first, but booting from that does not seem to finish loading. Starting up from a USB Mojave installer (which I have used before) I reformatted to HFS extended and then ...
gokelly1's user avatar
1 vote
1 answer
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Is it possible to replace an iMac Fusion Drive HDD with a bootcamp partition on it with an SSD using migration instead of reinstalling Windows?

On a late-2015 27" iMac, I have an SSD and a 2 TB HDD as a Fusion Drive, and Windows installed on the HDD with bootcamp. I'd like to replace the HDD with a 2 TB SDD. Is it possible to e.g. ...
cirko's user avatar
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Time Machine fails since enabling FileVault on iMac with Fusion Drive

I have an iMac with a Fusion Drive, and Time Machine configured to back up to an external USB disk. Everything used to work well, but then I enabled FileVault for the internal Fusion Drive. Since then,...
Kartick Vaddadi's user avatar
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2 answers
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Enabling external booting on a fusion drive Mac

I am trying to change the secure boot settings so that I can allow booting from an external disk. Normally to do this you would go into recovery mode with command + r and then change the settings. ...
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Restore from a Fusion Drive to a standard hard drive

I have an iMac with a built in Fusion Drive. I have switched to using an external Thunderbolt SSD as my boot disk, and I would now like to back up and wipe the internal Fusion Drive so that it can be ...
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Issue with my new iMac

I have a new iMac (27" 5k, mid-2017, 3.7ghz i5)(new in box, hadn't been opened), that has a 2tb fusion drive. I went through set up, but maybe I missed a step, because my drives are showing up ...
cubicadam's user avatar
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1 answer
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Does fixing a Fusion Drive using 'diskutil resetFusion' destroy the BOOTCAMP partition

I have a 2015 iMac 27" retina whose Fusion Drive split into separate drives whilst attempting to fix a partition table issue prior to upgrading to macOS Big Sur. I have a fully functioning ...
minus34's user avatar
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iMac 27 How to restore a SSD made invisible after formatting a fusion drive from APFS to HFS+

I bought a used Imac 27 with APFS fusion drive mOdel Identifier iMac15,1 before discovering the previous owner had replaced the original 512 Gb SSD by third party one with an adapter. After formatting ...
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How to replace fusion drive and restore MacOS?

I have 2014 Mac Mini with fusion drive running Catalina. If I replace original fusion SSD with bigger one, can I restore Time Machine backup or reinstall OS?
S Tang's user avatar
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Mac mini FusionDrive - “No CoreStorage Logical Volume Groups Found” [closed]

I can't figure out how to correct this at this point. I’m hoping someone here can point me in the correct direction. I have posted my terminal outputs below for diskUtil list and diskUtil cs list. @...
Jimmy Johns Johns's user avatar
1 vote
2 answers
465 views

Using one old fusion drive as two separate external drives

Recently my old fusion drive (1T HHD + 128G SSD) on my 2012 late Mac mini might have issues. The OS is very slow and has some read errors when I tried to use CCC to clone it. Anyways, I managed to ...
Richie's user avatar
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1 answer
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Bootcamp failing with "cannot create partion" and corrupting APFS container

My issue is similar to this one, Bootcamp says Disk Could Not Be Partitioned on Catalina Version 10.15.2 I'm on a 2019 iMac i9 27" with a 3TB Fusion that's been formatted with Catalina and APFS ...
Roger Benson's user avatar
1 vote
4 answers
3k 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 ...
Kabir Gupta's user avatar
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APFS Fusion Drive with external USB on 2018 Mac Mini

For fun, I've bought a USB thumbdrive from a reputable brand, and was able to build an APFS fusion drive (with the internal SSD as the main, and the USB thumbdrive as the secondary) on my 2018 Mac ...
Bart Doe's user avatar
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Track down disk activity MacMini and Mojave

Late 2014 MacMini with combo SSD + HD Fusion Drive Usually runs great, about 3x a day I can hear the HD really doing a lot of activity, reads / writes. What can I use to determine which process is ...
cjburkha's user avatar
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1 vote
1 answer
85 views

Trouble restoring hard drive space after deleting bootcamp partition

I have a problem with my Fusion Drive. I created partition for Bootcamp, then deleted it, then something went wrong. I lost 200 GB of space and I have a trouble restoring it, Fusion Drive capacity ...
darul360's user avatar
2 votes
1 answer
1k views

How do I stop a 2012 iMac internal Fusion drive from powering up

I want to completely stop my internal Fusion drive from powering up, since I no longer use it and it is very noisy. My late 2012 27” iMac came with a Fusion drive, which has long since stopped ...
libertedepense's user avatar
1 vote
1 answer
539 views

iMac beachballing for no reason — I suspect it might be faulty hardware. What can I do to work around it? [duplicate]

The Problem: A couple of weeks ago, the iMac started "beachballing" regularly in normal use There is no discernible pattern to what triggered a beachball. It could be switching between windows, ...
Jack's user avatar
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1 vote
1 answer
707 views

Upgrade from Fusion Drive to SSD without breaking fusion first

I replaced my fusion drive with a 1TB SSD but didn't break the fusion first. I'm running an iMac (27-inch, Late 2013) 3.2ghz i5 w/ 8GB RAM with Catalina 10.15.3 I'm attaching a photo of my device ...
Buckaroo Banzai's user avatar
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1 answer
132 views

Performance increase from Fusion Drive

I have a 2011 27" iMac i7 3.4gHz with 24 GB RAM. The startup disk is a 256 GB SSD and then I have another 1TB HDD installed as well. I use it for both design (Adobe Suite, Sketch, etc) and front-end ...
Daveh0's user avatar
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498 views

How Can I Recover My Data From a Failed Fusion Drive Using TestDisk?

I have a 2017 iMac (version 18,3) with Mojave on a 2TB Fusion Ddrive. The volume is not encrypted, no Bootcamp, I created no extra partitions. Aside from the migrated data from my old MB Pro, it ...
tripleman's user avatar
0 votes
1 answer
785 views

Is my Fusion Drive set up on my iMac correct? or is there a fix?

I have a 2013 iMac previously running Mojave, now running Catalina. I thought on Catalina, that when in Internet Disk Recovery Mode, you should be able to select the Fusion Drive and be able to erase ...
KresWon895's user avatar
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Had to force computer into OS recovery

Upon opening "Disk Utility" from the Recovery window, a prompt asks if I want to revert to a working state. How far back does a working state go? Does this mean I will lose files from my desktop? ...
cndzine's user avatar
2 votes
1 answer
3k views

creating APFS fusion drive / conversion to APFS from HFS+ fusion drive fails - "you are trying to create an upside down Fusion"

I have 1TB Internal SSD and 512GB SD card in a SD slot. I can create a fusion drive in HFS+ format, and the drive was running fine on my previous El Capitan system. Now that I upgraded my system to ...
alpacat's user avatar
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1 vote
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Can I recover a drive after accidentally allocating it to a fusion drive?

I made an incredibly boneheaded mistake. I typed diskutil cs create Fusion\ Drive disk1 disk2 instead of diskutil cs create Fusion\ Drive disk0 disk1 (while I was looking at the list to make sure I ...
Calion's user avatar
  • 553
1 vote
3 answers
2k views

iMac login screen is very slow (Mojave, maybe the Fusion Drive?)

Whenever I wake up my iMac, the login screen takes very long time to respond (roughly 8 seconds). This happens on Mojave (I cannot remember if it also happened in the previous OS but I think it did). ...
bobsacameno's user avatar
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0 answers
43 views

2012 Mac Mini with Fusion Drive only Boots while Verbose Mode

I have a mac mini 2012 which only boots to completion when in verbose mode. when just normal booted it gives the fan symbol for a few seconds and then loops back around. I've done a time machine ...
BostonMacOSX's user avatar
1 vote
0 answers
201 views

Macbook 'Missing Space' Issue after Removing Partition

I had previously set up my 2012 Macbook Pro in a fusion drive configuration (250GB ssd and 500GB HD) for macOS and had a 250ish GB partition for Windows on my 500 GB hard drive. I tried removing the ...
Jash15's user avatar
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