Hello everyone!
I'm newbie in HDD tech, so kindly ask you to be patient to my question, help me with understanding of following:
By looking at HDD model, how can i tell which type of processor used there (ARM/ARCH). For example one gent. by looking on model of my hdd was told that this is ARCH HTS545050B9A302, when i asked him how he did that, he told that B9- HTS545050
B9A302 means that processor is Arch family, but unfortunately he didn't explain to me how i can do the same by looking at model

I also will be highly appreciate you if can teach me what else info i can read by analyzing hdd model name.
Thank you for you time!