Local Apple support suggested me to change the 2 TB Seagate Fusion drive with a 2 TB SSD to increase speed in my 27" Retina iMac with macOS Sierra installed.
I had a full backup done with Carbon Copy Cloner in an external hard drive. Unfortunately my little son trashed the drive which was spinning and is now totally unavailable.
The original Fusion Drive, untouched after replacement, is now in an external USB3 enclosure.
While most of my important files are in Dropbox, some files are not actually lost but are in the original fusion drive.
If I connect the drive to the iMac in the USB3 port, not only it doesn't show up on the Desktop, but the Disk Utility tells me the disk is unformatted.
Is there any possible way to rescue some of the files from that drive?
I didn't do anything yet just connected it and opened Disk Utility.
I think the Drive must be partitioned in such a way so the internal 32 GB fusion no longer recognizes the old drive as the new SSD is now linked with it and no longer sees anything.
I am in deep troubles now and I wonder if using terminal or any other utility I can bring back the "Data Section" of the Fusion Drive.
The local Apple Support Centre tells me that even removing the SSD and putting back the original Seagate HD it will be impossible for the iMac to go back to the previous condition as now the 32 GB are linked to the SSD.
This is my diskutil list:
Last login: Thu Jun 7 11:14:42 on ttys000 Nuovo:~ dante$ diskutil list /dev/disk0 (internal, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *1.0 TB disk0 1: EFI EFI 209.7 MB disk0s1 2: Apple_CoreStorage Macintosh HD 999.9 GB disk0s2 3: Apple_Boot Boot OS X 134.2 MB disk0s3 /dev/disk1 (internal): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme 121.3 GB disk1 1: EFI EFI 314.6 MB disk1s1 2: Apple_CoreStorage Macintosh HD 120.4 GB disk1s2 3: Apple_Boot Recovery HD 650.0 MB disk1s3 /dev/disk2 (internal, virtual): #: TYPE NAME SIZE IDENTIFIER 0: Apple_HFS Nuovo +1.1 TB disk2 Logical Volume on disk0s2, disk1s2 ACEB7E29-F492-4F74-819B-E9F145007331 Unencrypted Fusion Drive /dev/disk3 (external, physical): #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *2.0 TB disk3 1: EFI EFI 209.7 MB disk3s1 2: Apple_CoreStorage Macintosh HD 2.0 TB disk3s2 3: Apple_Boot Recovery HD 650.0 MB disk3s3 Nuovo:~ dante$