/proc/diskstats file has two domains, one is read, a sector number is read, who is a great god can tell the difference

CodePudding user response:

One Seek to understand as an IO operation, it contains the addressing Time (Seek Time), the rotation Time Delay (Rotational Delay), delivery Time, Transfer Time), popular speak be head movement to the track of the Time, the head at the track on waiting for spindle Transfer data starting point starting point to the head of Time, the data read from the head out of the Time,

I understand:
Read the number refers to the situation of not consider buffer buffer independent IO number;
A disk IO, involving at least one sector, under normal circumstances may involve multiple sectors, read sector number is in the process of the IO read how many sectors,