[Q]why does i/o scores so low in xperia mdpi?

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I have seen the benchmarks of htc one v, it has the same specs as lww, mini etc. , the quadrant score for the i/o was 2000 approx, but it is 1000 approx on my lww, why?
I tried to change all the possible i/o schedulers in mesa kernel via set cpu, but the score always comes between 900 and 1000.
Questions:
1) is i/o scheduler even related with the i/o benchmark scores?
2) how can i/o performance increase?
3) why gaming on one v is way smoother than lww?

Do not depend on benchmark scores. The true rating of the phone will be with how it runs for the user.

Best Regards,
AJ