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You need bonnie++ package for this. More detail than a simple hdparm -t /dev/sda would give you.
the -d is the directory where it performs writes/reads for example I use /tmp/scratch with 777 permissions
Bonnie++ benchmarks three things: data read and write speed, number of seeks that can be performed per second, and number of file metadata operations that can be performed per second.
There are 3 alternatives - vote for the best!
If you can do better, submit your command here.
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