Same issue (as far as finding a FW file goes), different drive.. Although the PM863 is a far more common SATA rather than NVMe drive.Oh no, this sounds like a problem again, I though for genuine Samsung it was in the firmware updater (magician) ?
I have only a HPE branded pm863a 3.84tb so I assume now use. Never updated my 960gb & 1.92tb pm863a’s so if you get a source maybe I will ask if I can get and update those as a once and final update.
To be fair, I suppose the big difference here is that Samsung doesn't (AFAIK anyway) sell their "enterprise" drives to customers directly(well officially anyway, OEM's may sell them anyway).The only ones who have a great track record in supporting their OWN enterprise grade drives (meaning not rebranded!) openly with regular folk are Intel and Micron.