mydisktest --mode benchmark --size 1G --rw random --bs 4K /dev/nvme0n1
: Includes a rigorous mode to detect if the drive uses low-quality "black chips" (recycled or substandard flash chips). How to Use MyDiskTest Mydisktest V2.42
Beyond capacity, speed matters. Mydisktest V2.42 benchmarks the drive’s sequential read and write speeds. This helps identify “slow” USB 2.0 drives disguised as USB 3.0, or drives with defective NAND chips that slow down drastically under load. mydisktest --mode benchmark --size 1G --rw random --bs