Iometer – Disk Response
Version and / or Patch Used: 1.1.0
We use Iometer to measure disk response times. Disk response times are measured at an industry accepted standard of 4k QD1 for both write and read. Each test is run twice for 30 seconds consecutively, with a 5 second ramp-up before each test. The drive/array is partitioned and attached as a secondary device for this testing.
Average Disk Response
Write response times benefit most from RAID 0 because of write caching. There is a slight latency increase in read response times for an array vs. a single drive. This is where the similarity between our 2 IMFT arrays ends. Our 730 array has superior latency, but our M550 array does not.
DiskBench - Directory Copy
Version and / or Patch Used: 220.127.116.11
We use DiskBench to time a 28.6GB block (9,882 files in 1,247 folders) of mostly incompressible random data as it's transferred from our OS array: to our test drive/array. We then read from a 6GB zip file that's part of our 28.6GB data block to determine the test drive/array's read transfer rate. The system is restarted prior to the read test to clear any cached data, ensuring an accurate test result.
Write Transfer Rate
Read Transfer Rate
Our M550 array delivers our best read transfer performance to date. Write transfer performance comes in last place; however, there is not a whole lot of difference between first and last.
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- Page 1 [Introduction]
- Page 2 [Specifications, Pricing and Availability, Drive Details & Test System Setup]
- Page 3 [Synthetic Benchmarks – ATTO, Anvil Storage Utilities, CrystalDiskMark & AS SSD]
- Page 4 [Benchmarks (Trace Based OS Volume) - PCMark Vantage, PCMark 7 & PCMark 8]
- Page 5 [Benchmarks (Secondary Volume) – Disk Response & Transfer Rates]
- Page 6 [Benchmarks (Secondary Volume) – PCMark 8 Extended]
- Page 7 [Final Thoughts]
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