Implementing upgrades to my expandable address memory HDD

[Apocryphan]

by changing the decoder on the second hard drive to pick up the 4th signal and write it, and having the decoder on the first hard drive pick up the 3rd signal and write it, so the same signal gets sent to both drives but each drive takes half the byte, and then just have the outputs join and have the second output arrive 2 comparators after the first signal, so when you recall the value stored at the address 1-0-3, both hard drives will output at the same time if you use equal length wires. so this doesn't store 2 values in 1 cell if that's what you interpreted, but uses 2 drives with the same address but different decoders. Good question, i hope this clarified a few things.