JBOD, at the logical level combines physical disk drives into one larger drive. This comes in handy when dealing with an assortment of drives. Where RAID configuration combines drives at the limit of the smallest disk, JBOD does not.

Starting with the Reader tests, IOZone places a file on the system measures the performance of reading that file.

Next, the Re-Reader test measures the system’s caching ability. While it is typical that Re-Reader results are significantly higher than those reported in the Reader test as the test measures reading performance of a file that was previously read, the effects are insignificant with larger file sizes. If we attempted this test with files in the few hundred KB mark, we would see a larger jump.

The peak read speed is just over 40MB/s and the average considering all file sizes and record sizes is 22.5MB/s.

The Writer test measures performance of writing a new file to the system.

The average throughput of writing is just shy of 18MB/s. With Re-Writer the cache significantly increases the performance to an average of 55MB/s. We peak as high as 133MB/s with Re-Writer and 45MB/s with Writer when transferring 32MB at record sizes of 64kb.

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