Is the controller really going to be that much simpler on a HDD? On HDD you still have things like command queuing, caching, checksumming and bad block remappin

Is the controller really going to be that much simpler on a HDD? On HDD you still have things like command queuing, caching, checksumming and bad block remapping just as with SSD. Sure you don't have the flash translation layer, but I'd expect processing of the analog signal going to/from the heads to be a processing headache too. I wouldn't be surprised if they have to do temperature compensation and factory and/or runtime calibration of the analog path. Of course much of that will be done in fixed-function custom hardware blocks, but almost certainly so would a SSD for eg. ECC calculations. https://spritesmods.com/?art=hddhack&page=3 https://spritesmods.com/?art=hddhack&page=3 has some data points on a 10+ year old HDD - 3 ARM9 feroceon cores + Cortex-M3 core. Doesn't sound too simple.