head -c 8388608 </dev/urandom > random.bin
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./flashrom -p stlinkv3_spi:spispeed=12000 -w random.bin -c MX25L6406E/MX25L6408E
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./flashrom -p stlinkv3_spi:spispeed=12000 -r random_read.bin -c MX25L6406E/MX25L6408E
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diff random.bin random_read.bin