Where is Sudden Motion Sensor data stored?

Background:
I replaced my superdrive with an optibay + ssd (OS is stored here) and I left the stock HD (home folder) in it's place.
Problem:
I guess I triggered the SMS the other day and now I can't access my HD (basically just hangs / takes forever to load anything) unless I disable SMS. Where would I clear the data / tell it that my HD is safe to use again. Restarted pram and reinstalled OS, but it didn't help.

Thanks for the responses. Yes, as JoeyR stated, I replaced my superdrive with an SSD and the hard drive is in it's original place so I wanted to re-enable the sudden motion sensor. Thank you for clarifying how the SMS works. I wasn't sure if there was a state that was saved somewhere.
Well the original issue was that my OS would boot (SSD), but I couldn't get into my login (HD). I have a temporary user on the SSD so I was able to use that to troubleshoot. I swapped my HD with another one and it worked (STOCK HD). Then I tried putting the HD into an external closure and that worked as well. I had a feeling it was the connector, but I did not have spare parts to test this theory. I would swap the HDs back and forth and sometimes it would work and sometimes it wouldn't. It was a hit or miss situation. It worked when I disabled the SMS, but when I enabled / disabled it again it didn't work. Ran diagnostics on the HDs, both drives seem fine and in perfect condition. Tried to format the hard drivers and do various combinations of swapping drives and in the end the problem still persisted so it had to be a connector issue. I brought it into repair and they replaced the SATA cable for me and all is good now.
Thanks for the help.

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    Message was edited by: PerseP
    Message was edited by: PerseP

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