Originally Posted by HybridCore
Originally Posted by parityboy
I'm willing to bet that the 750GB model uses 1TB platters; it's much cheaper to crank them out using the same tooling, and then make the necessary changes in the drive's firmware.
It wouldn't take much to alter the location of the start of the outer zone so that the drive becomes a 750GB unit.
Wonder if there's a possible platter unlock if this is true.
Not possible. People have toyed with the idea, but HDD firmware is too complicated. Even if you get it figured out for one firmware version, what about the dozens
of other versions that they put out for the same model?
Originally Posted by parityboy a)
Assuming the platters are all cut the same size
, then like I said just alter the firmware so that the track zero is some ways in from the outer edge. This way you will not only get lower capacity, you will also get lower maximum sequential transfer rates, compared to the full 1TB unit.
Assuming technique a)
is used, then theoretically you could flash it with 1TB firmware, although since the servo tracking data is actually on the platters, the real outer zones might not actually have any tracking data on them...
The method used most often is Method A. However, flashing firmware from a 1TB drive is not possible. I don't know if it's because the PCBs use different chips, or because the firmware includes a lot of data specific to that drive's physical configuration, or if there's just some lock/encryption/ID that hasn't been broken - but what I do know is that people tried it in the past with other models, and it didn't work.