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Western Digital Black & SanDisk Extreme Pro 1TB M.2 Review

By: Jon Coulter | m.2 SSDs in Storage | Posted: Apr 5, 2018 12:00 pm
TweakTown Rating: 99%Manufacturer: Western Digital

Iometer - Maximum IOPS

 

Version and / or Patch Used: Iometer 2014

 

We use Iometer to measure high queue depth performance (No Partition). We test NVMe SSDs using eight threads at QD32 (QD256). We do this because we want to see what the drive can generate at its maximum attainable queue depth.

 

Max IOPS Read

 

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Max IOPS Write

 

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Western Digital uses CDM for their factory specs which is why random read IOPS are so much lower on this chart. Without a partition, the WD drives are not reading from the SLC cache. Random Write IOPS as delivered by the WD offerings are both new lab records for flash-based SSDs.

 

We decided to see what would happen if we ran this test with a partition on the drive:

 

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Both drives on both platforms hit 476K random read IOPS with a partition on the drive.

 

 

 

Iometer - Disk Response

 

Version and / or Patch Used: Iometer 2014

 

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 runs twice for 30 seconds consecutively, with a 5-second ramp-up before each test. We partition the drive/array as a secondary device for this testing.

 

Avg. Write Response

 

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Avg. Read Response

 

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The SanDisk Extreme Pro running on our Z270 test system sets a new lab record for the lowest write response of any flash-based SSD we've tested.

 

 

DiskBench - Transfer Rate

 

Version and / or Patch Used: 2.6.2.0

 

We use DiskBench to time a 28.6GB block (9,882 files in 1,247 folders) composed primarily of incompressible sequential and random data as it's transferred from our Toshiba RD400 1TB NVME SSD to our test drive.

 

We then read from a 6GB zip file that's part of our 28.6GB data block to determine the test drive's read transfer rate. Our system is restarted prior to the read test to clear any cached data, ensuring an accurate test result.

 

 

Write Transfer Rate

 

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Read Transfer Rate

 

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We recently upgraded our test system to Windows 10 build 14393. With that upgrade, write transfer rates almost doubled. The reason for this, as far as we know, is that CPU power switching modes have been relaxed on the latest version of Windows 10.

 

We included the NVMe drives we've tested to date on this build of Windows 10. If you needed a good reason to upgrade to a newer version of Windows 10; this is a good reason.

 

More lab records fall to the Western Digital offerings. The Extreme Pro running on our Z270 system smashes our read transfer rate record. The WD Black running on our X299 system delivers a new lab record for write transfer rate.

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