How to test hard disk read and write speed in Linux

Instances

Another method

Linux hard disk write speed

< Br> 1 # time dd if=/dev/test of=/var/test bs=2k count=1000000

Linux hard disk read speed

1 # time Dd if=/var/test of=/dev/null bs=2k

Command details: time is used for timing dd for copying, read from if, write toofif=/dev/zero Does not generate IO, so it can be used to test the write speed; similarly, of=/dev/null does not generate IO, can be used to test the pure read speed bs is the size of each read or write, that is, the size of a block, count is The number of read and write blocks, multiplication is the amount of read and write data. The larger the amount of data, the more accurate it is. The average value of multiple tests is