Could you please tell me how to find the cause that made I/O high

Could you please tell me how to find the cause that made I/O high
please let me know

hi ,
Without any backgound inforamation it is very difficilate to help u out .
Please Provide the statpack/Awr report durring that priode. oherwise top 5 wait event. so we can give some suggestion on this.

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