What does the hard drive 5400 turn and 7200 turn mean?

The speed of hard disk is one of the key factors to determine the internal transmission rate, which directly affects the user's daily data storage. So the faster the speed, the faster the hard disk looks for files, and it means the faster the transmission. More thoroughly, most laptops now use mechanical hard drives that rely on spindle motors to drive the disc to rotate at high speed to generate buoyancy, to make the head float above the platter, to bring the sector of the data to the head below, the faster the speed is the shorter the wait time, which also means efficient work.

Generally speaking, 7200 to 5400 turn the hard disk certainly in varying degrees to improve the performance of the computer, the hard work of the faster the speed of operation, the greater the power consumption, the heat will be relatively low speed of a lot of higher. The same configuration notebook, 7200 turn of the hard disk temperature is higher than 5400 rpm, read and write speed is also relatively fast. 7200 rotating hard disk compared to 5400 to drive, in the transmission rate can better meet the needs of users.

A 7200 (RPM) hard drive, the time required for each rotation of the week is 60x1000÷7200=8.33 milliseconds, the average rotational latency is 8.33÷2=4.17 millisecond (in the average case, the need to rotate half a circle). According to the same calculation method, a 5400 (RPM) hard drive, the average rotation delay time is 60x1000÷5400÷2=5.56 milliseconds. In comparison, the 7200 turn is theoretically 15% faster than 5400, but the actual speed is only less than 10% higher than the latter, far from what many people expect of One-third.

PostScript conclusion: In accordance with the trend of the hard drive, we are sure to use 7200 turn of the hard drive, noise, like quiet friends, recommend the selection of low speed hard drive. The speed of the hard disk and the noise is basically proportional to the relationship, the higher the speed, the greater the noise. Can buy SSD hard disk with economical condition.