I see this differently:
The screenshot you posted shows your Fusion IS split. Were it not , the screenshot would show ONE drive labeled "Fusion," not two lableled "SATA" and "PCI-Express." This excerpt is from the Apple article on split Fusions drives:
So it appears your Fusion s split, as Storage does not properly identify it as "Fusion.."
This shows your current drive scores:
Performance:
System Load: 8.36 (1 min ago) 6.20 (5 min ago) 3.78 (15 min ago)
Nominal I/O usage: 4.87 MB/s
File system: 67.91 seconds ⚠️
Write speed: 42 MB/s ⚠️
Read speed: 132 MB/s ⚠️
A healthy Fusion drive in your iMac model shou be doing Writes between 600 and 900MB/sec, and Reads of 1400MB/sec of higher. "File System" is a rough measure of drive health. Healthy drive are usually under 40 seconds.
I would start with a thorough backup, maybe two different ways if you wear both belt and braces, then use the instructions in this article to rebind the two fusion components:
How to fix a split Fusion Drive - Apple Support
If successful, see if the drive speeds approacj the healyty speed ranges I posted above, and the the File
I has seen several Etrecheck reports lately where split Fusion drives still show as Fusion
This shows your curent drive scores:
Performance:
System Load: 8.36 (1 min ago) 6.20 (5 min ago) 3.78 (15 min ago)
Nominal I/O usage: 4.87 MB/s
File system: 67.91 seconds ⚠️
Write speed: 42 MB/s ⚠️
Read speed: 132 MB/s ⚠️
A healthy Fusion drive in your iMac model should be doing Writes between 600 and 900MB/sec, and Reads of 1400MB/sec of higher. "File Systme is a rough measure drive health. Healthy drive are usually under 40 seconds.
I would start with a thorough backup, maybe two different ways if you wear both belt and braces, then use the instructions in this article to rebind the two Fusion components:
How to fix a split Fusion Drive - Apple Support
If successful, do EtreCheck again to see if the drive speeds approach the normal speed ranges I posted above, and that the File Systme score has gone down.
