Thanks, fzabkar and data-medics.
@data-medics : Sure that cold swap doesn't suffice.
Quote:
Really the only number I look at for PCB swaps is the actual number printed on the PCB (not the sticker, but the number in green on the board).
Assuming that you mean the number in white on the green board, do you mean that you don't even match the P/N when doing a PCB swap?
Then, I assume you use a reballing station or equivalent to swap the large flat chips or I'm wrong?
Would swapping the BIOS between two PCB with same number suffice even if the P/N is completely different?
In my example of P/N 9BX134-505 and 9BX134-511, the boards are same, but the MCU is different. So I assume that the three last digits might be used to remember which combination of chips is on the PCB, but this would really need some investigation.
When doing a BIOS swap, do you also care about the chips (at least the main one and the motor control chip) or just the PCB?
When you tell about matching P/N, do you mean the whole P/N with the 6+3 digits or just the first six ones ?
The last three digits are sometimes difficult to match and lead to purchase drives or PCB which can sometimes be quite expensive.
For a BIOS swap, did anyone try matching just the first six numbers of the P/N (as well of course as the PCB board number)?