> Adding the second drive module is something that we should not expect to work
Hard disagree. This approach works for just about any normal storage medium. Apple decided to Think Different about where the SSD controller lives and works and how storage pinouts work, but their weird approach wasn't publicly documented anywhere until people like this guy started trying.
Uninitialised storage would've normally showed up just like that, as uninitialised storage, ready to be partitioned. Instead, the device didn't even turn on, let alone show the added flash storage in a partitioning tool.
You're still thinking of the storage modules as standalone SSDs to be managed by software, rather than devices hidden behind hardware RAID.
I did almost exactly the same kind of drive-swapping tests with the WD Black AN1500 [0] in an Intel PC, with the same results in terms of whether the system can boot from the device, but none of that supports the conclusion that Western Digital is locking down what drives can be used behind that RAID controller. You can swap drives on the AN1500, but almost any such operation will require you to erase and reinstall.
Hard disagree. This approach works for just about any normal storage medium. Apple decided to Think Different about where the SSD controller lives and works and how storage pinouts work, but their weird approach wasn't publicly documented anywhere until people like this guy started trying.
Uninitialised storage would've normally showed up just like that, as uninitialised storage, ready to be partitioned. Instead, the device didn't even turn on, let alone show the added flash storage in a partitioning tool.