Tech content trusted by users in North America and around the world
7,245 Reviews & Articles | 52,532 News Posts

Crucial M550 512GB 2-Drive SSD RAID Report

By: Jon Coulter | RAID in Storage | Posted: May 28, 2014 2:50 pm

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.


Write Response




Read Response




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:


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.

    PRICING: You can find products similar to this one for sale below.

    United States: Find other tech and computer products like this over at Amazon's website.

    United Kingdom: Find other tech and computer products like this over at Amazon UK's website.

    Canada: Find other tech and computer products like this over at Amazon Canada's website.

    We at TweakTown openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion of our content. If any company representative wishes to respond, we will publish the response here.

Related Tags

Got an opinion on this content? Post a comment below!