That is correct.
The replacement disk is a Samsung EVO 870 SSD.
I tried replacing it with the same identical vendor (not F5 sourced though) WD-Velociraptor 1TB, but the results are the same.
here is the output of the command. The disk is recognized, just wont add to raid.
---------------------------------------------------------------------
Sys::Raid::Disk
Name Serial Number Array Array Status Model
Member
---------------------------------------------------------------------
HD1 WD-WXR1E63HMUYD yes ok ATA WDC WD1000CHTZ-0
HD2 S6PNNJ0W412826X no undefined ATA Samsung SSD 870