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Samsung 850 Pro 256GB Three-Drive SSD RAID Report

By: Jon Coulter | RAID in Storage | Posted: Jan 9, 2015 3:14 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

 

samsung-850-pro-256gb-three-drive-ssd-raid-report_22

 

OS Volume 75% Full - Steady State

 

samsung-850-pro-256gb-three-drive-ssd-raid-report_23

 

Secondary Volume Empty - Lightly Used

 

samsung-850-pro-256gb-three-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.

 

samsung-850-pro-256gb-three-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. This is exactly why we focus on steady state performance. Again, our 850 Pro array is able to outperform the competition, delivering massive light usage model steady state performance. Here is where we begin to see that Toshiba's Q Series Pro is a force to be reckoned with. Despite its sub-par synthetic performance, our Q Series Pro array delivers where it really matters, in an OS based workload scenario.

 

 

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

 

samsung-850-pro-256gb-three-drive-ssd-raid-report_26

 

samsung-850-pro-256gb-three-drive-ssd-raid-report_27

 

For the first time, our 850 Pro array does not dispatch the competition, and comes in third place.

 

 

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

 

samsung-850-pro-256gb-three-drive-ssd-raid-report_28

 

samsung-850-pro-256gb-three-drive-ssd-raid-report_29

 

PCMark 8 is the most intensive workload simulation we run, and our 850 Pro array does not do well with this testing. Our Intel 730 array shows us why it is our current RAID champion. Our Q Series Pro array also displays its incredible prowess when it comes to running random mixed workloads.

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