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Crucial M550 512GB 2-Drive SSD RAID Report

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

Light Usage Model

 

We are going to categorize these tests as indicative of a light workload. If you utilize your computer for light workloads like browsing the web, checking emails, light gaming, and office related tasks, then this category of results is most relevant for your needs.

 

 

PCMark Vantage - Hard Disk Tests

 

Version and / or Patch Used: 1.2.0.0

 

The reason we like PCMark Vantage is because the recorded traces are played back without system stops. What we see is the raw performance of the drive. This allows us to see a marked difference between scoring that other trace-based benchmarks do not exhibit. An example of a marked difference in scoring on the same drive would be empty vs. filled vs. steady state.

 

We run Vantage three ways. The first run is with the OS drive/Array 75% full to simulate a lightly used OS volume filled with data to an amount we feel is common for most users. The second run is with the OS volume written into a "Steady State" utilizing SNIA's guidelines (Rev 1.1). Steady state testing simulates a drive/array's performance similar to that of a drive/array that has been subjected to consumer workloads for extensive amounts of time. The third run is a Vantage HDD test with the test drive/array attached as an empty, lightly used secondary device.

 

OS Volume 75% Full - Lightly Used

 

crucial_m550_512gb_2_drive_ssd_raid_report_22

 

OS Volume 75% Full - Steady State

 

crucial_m550_512gb_2_drive_ssd_raid_report_23

 

Secondary Volume Empty - Lightly Used

 

crucial_m550_512gb_2_drive_ssd_raid_report_24

 

As you can see, there's a big difference between an empty drive/array, one that's 75% full/used, and one that's in a steady state.

 

crucial_m550_512gb_2_drive_ssd_raid_report_25

 

The important scores to pay attention to are "OS Volume Steady State" and "OS Volume 75% full." These two categories are most important because they are indicative of typical of consumer user states.

 

When a drive/array is in a steady state, it means garbage collection is running at the same time it's reading/writing. There is a huge difference in performance between a single drive and a 2-drive array.

Our M550 array delivers the third best steady state performance we've measured.

 

 

PCMark 7 - System Storage

 

Version and / or Patch Used: 1.4.00

 

We will look to the Raw System Storage scoring for RAID 0 evaluations because it's done without system stops and therefore allows us to see significant scoring differences between drives/arrays.

 

OS Volume 75% Full - Lightly Used

 

crucial_m550_512gb_2_drive_ssd_raid_report_26

 

crucial_m550_512gb_2_drive_ssd_raid_report_27

 

Toshiba's Q Series Pro is hard to beat in this test. Our M550 array performs quite similarly to our 730 series array; both arrays utilize 20nm IMFT flash.

 

 

PCMark 8 - Storage Bandwidth

 

Version and / or Patch Used: 1.2.157

 

We use the PCMark 8 Storage benchmark to test the performance of SSDs, HDDs, and hybrid drives with traces recorded from Adobe Creative Suite, Microsoft Office, and a selection of popular games. You can test the system drive or any other recognized storage device, including local external drives. Unlike synthetic storage tests, the PCMark 8 Storage benchmark highlights real-world performance differences between storage devices.

 

OS Volume 75% Full - Lightly Used

 

crucial_m550_512gb_2_drive_ssd_raid_report_28

 

crucial_m550_512gb_2_drive_ssd_raid_report_29

 

Again, our M550 array performs most similarly to our 730 array. Both IMFT flash-based arrays easily outpace the Toshiba flash-based arrays. The M550 and 730 arrays are scaling better than the Toshiba flash-based arrays.

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