The general syntax of the dd command looks like this dd if=path/to/input_file of=/path/to/output_file bs=block_size count=number_of_blocks Then read the same file out using the same block site. Then use the dd command to first write a file using fixed sized blocks. Mount the drive and navigate into it from the terminal. Whereas Sata 3.0 supports twice that speed. Sata 2.0 has a maximum theoretical speed limit of 3Gbits/s which is roughly 375 Mbytes/s. SSD connect via SATA ports which have different versions. For example a USB 2.0 port has a maximum operational speed limit of 35 Mbytes/s, so even if you were to plug a high speed USB 3 pen drive into a USB 2 port, the speed would be capped to the lower limit. The data transfer speed does not depend solely on the drive, but also on the interface it is connected to. In this post we shall use the dd command to test and read and write speed of SSD and USB drives on Linux using the dd command. The dd command is a simple command line tool that can be used to read and write arbitrary blocks of data to a drive and measure the speed at which the data transfer took place. The speed of a drive is measured in terms of how much data it can read or write in unit time.
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