Diskspd
Diskspd Is a test tool for IO. Diskspd (version 2.0.17) combines robust and granular IO workload definition with flexible runtime and output options, creating an ideal tool for synthetic storage subsystem testing and validation.
In this test, the Block size to 8K. The test runs for 60 secs with all hardware and software caching disabled. It measure and display latency statistics, leverage 2 overlapped IOs and 4 threads per target, random 30% writes and 70% reads and create a 50MB test file at z:\test.dat
Here are the results for the Seagate ST8000VN0002
Average CPU utilisation = 10.36%
Total IO = 35.83 MB/s, Avg Latency 1.741, 4585.93 IOPs
Read IO = 25.10 MB/s, Avg Latency 1.733, 3213.24 IOPs
Write IO = 10.72 MB/s, Avg Latency 1.760, 1372.69 IOPs
As for WD WD30EFRX
Here are the results for the WesternDigital WD30EFRX
Average CPU utilisation = 9.27%
Total IO = 29.87MB/s, Avg Latency 2.089, 3822.73 IOPs
Read IO = 20.91MB/s, Avg Latency 2.070, 2676.42 IOPs
Write IO = 8.96 MB/s, Avg Latency 2.133, 1146.31 IOPs
From the benchmark data, the Seagate ST8000VN0002 is far better in terms of IO which can be seen in it’s various departments of read, write and total io in terms of the IO per sec and megabyte transfer per second.
The average latency is also lower on the Seagate ST8000VN0002 at 1.7~ compared to 2.0~ on the WD drives.