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Phison S11 SSD Preview: Toshiba BiCS TLC & Micron 3D MLC

By: Jon Coulter | SSDs in Storage | Posted: Aug 15, 2016 1:00 pm

Iometer - Maximum IOPS

 

Version and / or Patch Used: Iometer 2014

 

We use Iometer to measure high queue depth performance. (No partition one thread-QD32)

 

Max IOPS Read

 

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phison-s11-ssd-toshiba-bics-tlc-micron-3d-mlc-previe_23

 

With our configuration, we are able to easily exceed Phison's factory specification of 95K IOPS. Both drives deliver a whopping 99K read IOPS at QD32.

 

Max IOPS Write

 

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The BiCS-powered drive hits the factory spec of 85K right on the money. We were pleasantly surprised by the fact that the drive held steady at 85K throughout the entirety of the test, and did not quickly drop off after a few seconds like we've seen so many times from TLC SSDs. The Micron-powered drive delivered 88K IOPS, easily exceeding factory specs.

 

 

 

Iometer - Disk Response & QD1 Performance

 

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 at QD1

 

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This is the drive's unmasked write performance at QD1. The drive's pSLC cache is bypassed by this testing.

 

Avg. Read Response at QD1

 

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phison-s11-ssd-toshiba-bics-tlc-micron-3d-mlc-previe_29

 

This is the drive's unmasked write performance at QD1. The drive's pSLC cache is bypassed by this testing.

 

 

DiskBench - Directory Copy

 

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 DC P3700 PCIe 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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A sustained write transfer rate of 147 MB/s on the BiCS-powered drive had us scratching our heads. It should be better than that, so we decided to give it a go with server 2008 and there is a MASSIVE difference. We aren't sure exactly why, but we've noticed this before beginning when we switched from testing with Windows 7 to testing with Windows 8. Windows 8-10 chokes with sustained write transfers in comparison to Windows 7 and Server 2008. We think it may have something to do with the huge difference in 4K QD1 write performance between the OS's. Windows 7 will deliver approximately the same sustained write transfer rate as Server 2008. This should be music to the ears of Windows 7 users.

 

phison-s11-ssd-toshiba-bics-tlc-micron-3d-mlc-previe_32

 

The Micron-powered drive delivers a 314 MB/s sustained write rate. This is far better than we expected from a two-channel SSD.

 

Read Transfer Rate

 

phison-s11-ssd-toshiba-bics-tlc-micron-3d-mlc-previe_33

 

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Both drives wow for having only two controller channels.

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