Performance Testing

I’ve already discussed using hdparm -t as a way of performing some elementary data throughput tests. But hdparm doesn’t test a broad range of I/O operations, nor does it test performance over long periods of time, on large and small files, or on filesystem metaoperations such as file creation and deletion. For that reason, I recommend downloading and familiarizing yourself with some other performance test suites.

The two programs that I recommend are bonnie++ ( and tiobench ( You can use either program to run a variety of throughput tests on both individual block devices, as well as arrays (software and hardware). I urge you to perform tests at each stage of array deployment and performance tuning to get a better idea of the overall effect of the various adjustments on your system performance.

Get Managing RAID on Linux now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.