6
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Accepted
Is iMac FusionDrive->dual SSD migration any different from HDD->SDD upgrade from Time Machine perspective?
Time Machine has no idea what the underlying physical or partition structure is configured as. Time Machine operates at the file system layer.
You could have a single spinning hard drive and upgrade ...
- 98.8k
5
votes
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DIY Fusion drive with 3 drives
It is possible to create a Logical Volume Group spanning over more than two disks. I doubt that it will differentiate between fast and slow HDD. The SSD part should work though.
To accomplish this ...
- 66.1k
5
votes
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How to install or port data to a Fusion / Hybrid / SSHD drive
No, there is nothing special you need to do.
At the risk of oversimplifying things, the way that hybrid drives work is that they monitor the data being read from the drive and, over time, they ...
- 64.3k
5
votes
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Is it worth unsplitting my fusion drive?
What are the drawbacks/benefits of having a split fusion drive?
I think the first thing is to define what the purpose of a fusion drive is. A fusion drive was created to so you could get the ...
- 98.8k
4
votes
I think I messed up the Fusion Drive on my 2TB iMac
Preparation:
Detach any external drive (especially your external Time Machine backup drive)
Restart to Internet Recovery Mode by pressing alt cmd R at startup.
The prerequisites are the latest ...
- 66.1k
4
votes
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Messed up 1TB Fusion Drive Partitions (on iMac 5K)
To expand your CoreStorage Logical Volume Macintosh HD you have to delete the blocking NO NAME EFI partition (disk1s5). The two unnamed parts (138.62 GB and
99.9 GB) are no partitions but unallocated ...
- 66.1k
4
votes
How do I split Fusion drive on Mojave / APFS?
I did this earlier today on an iMac.
Boot to a Mojave USB boot installer.
Then Utilities → Terminal.
The commands are along the lines of:
diskutil apfs list
Then make note of the “virtual disk” that ...
- 149
3
votes
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Why does Apple recommend a 2TB FD over a 1TB Fusion Drive for iMacs with 32GB of memory?
The second part of that statement "or all flash storage" is universally true. Solid state storage that ships with the current (2015) lineup of hardware is almost an order of magnitude faster than HDD ...
- 232k
3
votes
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Boot camp does not boot after El Capitan update
System Integrity Protection (SIP) is something new with El Captain. This prevents the fdisk command from changing the Master Boot Record (MBR). You will need to temporarily turn SIP off by following ...
- 39k
3
votes
How to install or port data to a Fusion / Hybrid / SSHD drive
Strictly speaking, this won't be a Fusion drive as far as OS X 10.8 or 10.10 are concerned. The operating system will see the new part as a single drive, and Seagate's firmware will do all the "Fusion"...
- 4,109
3
votes
Does MacOS Support a Snapshot-Style Filesystem?
Apple's new file system, APFS, supports snapshots. Per their documentation:
APFS is available in 10.12.x (Sierra) as a Developer Preview and as a released product in 10.13.x (High Sierra).
Earlier ...
- 98.8k
3
votes
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How can I create an APFS fusion drive in Mojave using my SSD and HD?
Nothing could be easier with Mojave : just enter the following command at the command prompt
diskutil resetfusion
The process is done completely automatically. Just take care that the detected hard ...
- 354
3
votes
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Is it possible to add an SSD module to an iMac 27" Late 2012 model to create a fusion drive on that?
The Fusion drive was an option for the 2012 27" iMac, so there may be space. The iFixit tear-down for your model shows a caddy that holds both a hard drive and SSD: you'll need to read through it to ...
- 33.8k
3
votes
Is it worth unsplitting my fusion drive?
If you split the parts of a Fusion Drive, the drives are left in a meaningless state. You cannot re-fuse the drive and recover your data.
Restoring a complete snapshot should restore everything, ...
- 33.8k
3
votes
Is it worth unsplitting my fusion drive?
Yes - if your goal is to get the most speed out of your hardware, I would make a backup and let macOS rebuild a fusion drive. It’s way faster that way than alone and less fuss.
The only upside of ...
- 232k
3
votes
Accepted
Fusion Drive using external SSD & HDD
It's possible: though I would advise against it.
Fusion Drives were a nifty use of CoreStorage a decade ago, when SSDs were limited in size and expensive.
Fusion Drives are designed to retain a small (...
- 33.8k
2
votes
Accepted
Reuse an iMac's fusion drive?
A Fusion Drive is a combination of 2 drives, one Solid State (SSD) and the other a standard Hard Drive (HDD). You can remove the two drives and reuse them in enclosures as 2 separate drives.
- 5,049
2
votes
Can't delete Logical Volume Group on Fusion drive
If all other means fail to remove a CoreStorage Volume Group you can always use gpt to remove the CS partition (or the CS partitions if it is a Fusion Drive).
Preparation:
Detach your backup drive
...
- 66.1k
2
votes
Accepted
What's wrong with my Fusion Drive?
Probably your CoreStorage Logical Volume got corrupted!
I recommend to backup your data to an external drive with Time Machine and rebuild the FusionDrive from scratch.
Time Machine backup
To ...
- 66.1k
2
votes
Fusion drive is not working although the system can find the SSD
If you have your data safely backed up or don't care about losing it, you can follow these instructions to recreate your Fusion Drive.
Boot into Internet Recovery or an OS X bootable drive.
From the ...
- 6,212
2
votes
Accepted
Messed up my 1TB Fusion drive on my iMac with Disk Utility
I eventually made a call with Apple support. They asked me to use the option first aid in Disk Utility, this didn't help. They then asked me to reboot my iMac in recovery mode and do the same thing ...
- 41
2
votes
How to install or port data to a Fusion / Hybrid / SSHD drive
There is one very important thing to do and that is to enable TRIM support
sudo trimforce enable
In OS X prior to Yosemite, you had no way to enable TRIM on 3rd party drives. But in Yosemite and ...
- 98.8k
2
votes
Accepted
iMac disk partion FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFFFF and fusion drive unlinked
The second (and the third) partition of your internal HDD got the wrong partition types, your data probably won't be lost. If one part of a Fusion Drive (i.e. disk0s2) suddenly get a wrong partition ...
- 66.1k
2
votes
Accepted
Can CCC clone a Fusion drive and restore it to a new SSD?
In answer to your question: YES.
By way of explanation... CCC makes a copy of the file system, which is independent of what physical drives the file system is on. for example you could make a clone ...
- 22.8k
2
votes
Accepted
Replace Hard Drive in iMac with Fusion
A Fusion Drive is a composite of two physical drives: a fast but small SSD and a slower but larger HDD. Each of the physical drives contains three partitions: an EFI partition, a so-called physical ...
- 66.1k
2
votes
Is there a way to rescue the contents of this messed up Fusion Drive?
Ok so I did a test before I tried it with the actual affected drive. I had an old 60 GB laptop spinning hard drive, and a 32 GB laptop-form-factor Corsair SSD, which I made into a Fusion Drive.
I ...
2
votes
Accepted
3 TB Fusion Drive missing space after unsuccessful Windows installation via Bootcamp
Your 3.1 TB Fusion Drive isn't really missing space. Stopping the Windows install and trying to revert to a previous state inflated the size of the Recovery HD at the expense of your main macOS volume ...
- 66.1k
2
votes
Hard Drive I replaced still showing up in Disk Utility and as a Startup Disk
It's actually not a phantom drive; there's a 128GB SSD that originally came with the Mac mini to be used in conjunction with the HDD as a "Fusion Drive."
From Everymac.com:
This model also could ...
- 98.8k
2
votes
FileVault 2 encrypted Fusion Drive on iMac doesn't boot anymore
I was able to solve it using shift-cmd-option-R. I tried internet recovery before and it didn't work but the adding of the shift key installs the recovery version of the original OS the computer was ...
- 31
2
votes
How to upgrade to 10.13.3 with fusion drive on apfs
Apparently, you just have to threaten your mac here on askdifferent. Then, it will just install the 10.13.3 update overnight.
:P
- 335
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