Bit of an old thread but since I've got the answer, I thought I'd post.
The answer is yes, it can be sorted out. If the only issue is that the Fusion Drive has been split digitally or you had to manually split the drives due something else on the Mac not working (so they are't in a single container anymore and are greyed out and can't be mounted) but the physical drives themselves are fine, you can 're-fuse' them virtually and then get all your data.
As mentioned above using something like UFS Explorer Professional, you can mount the two disk images creating a virtual RAID which then allows you to see all the files which you can download then. This is because as explained above, the two drives share file data/information between the drives for all the files. So, if one drive doesn't work the files in the other won't be readable, you need both the 'lock and the key' so to speak.
What you need to do is the following go to disk utilities create a 'image' of each disk not the volume or drive. So you should have something like disk0s1 DMG (from the apple SSD) and disk1s2 DMG (for the HDD or SSD if you upgraded/changed it) then you take both of those DMG images into something like UFS and then use the virtual RAID complier to make a single virtual drive which mounts in the software.
Hope this helps everyone.
p.s this video shows step by step, they use the Microsoft image format for the drives, but DMG drive images also work (which you can create in disk utilities as I explained above): https://www.youtube.com/watch?v=HIfx8xPH...
4 opmerkingen
@bobsinger I have the same issue. How did you access to the HDD? Did you simply put the HDD in an enclosure as suggested by @danj and it showed up as a normal HDD on another Mac or you had more steps to do?
door Daniel Beaulieu
@Daniel Beaulieu I want to know also. :D
door Omar TT
I tried mounting the HDD in an enclosure and it didn't work. I had to use another iMac and use both the SSD and the HDD of my fusion drive to get things back.
door Daniel Beaulieu
@Daniel Beaulieu Thank you. I couldn’t find another Mac, I ended up formatting the disk. 🥺
door Omar TT