SSD's Power_On_Hours issues

Hello!

Shortly:

(1) Transcend SSD370S 128 GB: After power-on, Power_On_Hours doesn't
increase until I run offline test.

(2) ADATA Premier Pro SP920 128 GB: After unexpected power loss,
Power_On_Hours reset to 0 (zero). Also when on, Power_On_Hours
increase faster than real time clock (4 hours in S.M.A.R.T. vs. 3,75
hours actually).

(3) Kingston SSDNow KC400 128 GB: After unexpected power loss,
Power_On_Hours reset to 0 (zero).

Any ideas?

Opty

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