In the past the answer would be no as Sierra and older OS's leveraged the device type to set the way Apples 'Fusion Drive' worked. With it you needed one SSD and one HDD.
Right now we just don't know what Apple is doing as High Sierra redid the lower level structure from GUID/MacOS Extended (Journaled) to GUID/APFS. This may still be the way you'll need to go.
At this time High Sierra APFS Fusion Drives are not supported and RAID drives are also not working either. So we'll need to wait to see what happens. Will Apple fix APFS and when?
So what can I do now?? You'll need to leave the drives independent and just make sure you set the PCIe SSD as your boot drive.
Now the tricky part! The SSD Apple was using in a Fusion Drive is quite small FYI: Gizmodo - Apple Quietly Made the Fusion Drive Much Smaller So you may find it's not able to support your OS and Apps as well as have any spare space for virtual RAM (paging in Windows). You may want to add more RAM if you only have 8 GB to off set the smaller SSD's size.
You might want to forgo setting it as the boot drive as what you are using the system may be too much for the small drive.
As you where very clear you didn't want to alter the PCIe drive you might want to look at that again or look at getting an external RAID'ed Thunderbolt SSD drive.
Frankly, I would leave the system alone and go with the faster external RAID'ed SSD setup and make that my boot drive (Sierra only)
3 件のコメント
Actually I was able to successfully swap the 2TB HDD for a 2TB SSD from OWC. I then proceeded to install the OS using an Internet Recovery. Formatted the stock Apple 128gb SSD as a separate drive. Then rebooted into recovery using COMMAND R. Used Terminal to construct my own Fusion Drive using the SSD and Stock Apple SSD and then was able to reinstall the OS once more on a newly constructed Fusion Drive made up of two SSD’s. Badaboom! It can be done! Thanks anyway though.
David さんによる
The OS used was Sierra.
David さんによる
I wouldn't trust it Apple never intended a dual SSD setup with Fusion Drive.
Dan さんによる