If I had up vote points, you would receive them.
FTFY
If there is a failure of the "command channel" in the table, everything I said is correct.
(not only because it's complete nonsense)
Please quit posting on
The firmware is either stored on flash memory, or more recently, on the drive itself. Only a small bootloader is still in flash/rom of the controller
That sounds like a chicken-egg problem. If the drive can access the platters without firmware, what's the point of the firmware then? Or if the 'small bootloader' can actually access the platters, then what does it need to read the 'real thing' from the platters for?
It is not every question that deserves an answer. -- Publilius Syrus