I never understood why they didn't make a hard disc that operated its heads in parallel and distributed data accordingly. Still one assembly, but using all the

I never understood why they didn't make a hard disc that operated its heads in parallel and distributed data accordingly. Still one assembly, but using all the resources it has. You'd have (for example) a four-platter, eight head drive, and instead of storing a given byte serially at cylinder 123, head 0, sector 5, bytes 0-7, you'd store it at cylinder 123, sector 5, byte 0, and light up heads 0-7 all at once. Now, this might have been hard with early logical drive designs that tracked the physical geometry and expected a more serial format, but that was long ago hidden beneath LBA translation. Maybe there's a power or crosstalk issue with activating 8 heads at once.