Random vs Sequential Read in FIO

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Hi,

I was using FIO to get response time of random reads and sequential
reads from phone's flash memory and I got like 9x greater response
time for random read. Since there is no seek time as in conventional
rotating storage, I'm wondering where this huge jump of random IO
response time comes from? How is the total IO delay actually
calculated in FIO?

Thanks much for your inputs.
David
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