Same serial on 2 disks

[Lewin]

I have the same serial number on my two different disks (CD8AE8878D6D719D841024DD2D275902)

Sometime on the same disk I had different serial (4EF355FCC4B36215B49AA40FC1AFFFB4) and now has changed to this CD8AE8878D6D719D841024DD2D275902 serial from my main disk.

I tried reinstalling windows, and turn on the computer on each disk separately, and serial is still same

Can you check this?

[Vinyard]

Hi, welcome to the forums!

From my understanding of how serials work, also based on the information provided on the wiki here, "they aren't only based on hardware, but more". This, of course, means that your serial is not only bound to the disks you're using, but it actually takes into consideration other software and/or hardware related information.

Again, from what I can gather, the fact that MTA 'synced' your serial to also take into consideration your secondary disk seems to be the right thing to happen. Such actions as reinstalling Windows will, as you have already found out, have no impact on your serial.