To measure disk performance on Linux, you should first plug the drive into the machine. If it is a SSD or HDD, you should shut down the computer, insert the drive and reboot the system. For SD cards, you should use a SD card reader which can be inserted via a USB port to the computer. 1 Once the drive is connected, you can use various tools to benchmark the disk performance. These tools can measure the read and write speeds of the disk, as well as the latency and other performance metrics.