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SanDisk X400 1TB SATA III SSD Review

By: Jon Coulter | SSDs in Storage | Posted: May 26, 2016 5:50 pm
TweakTown Rating: 93%Manufacturer: SanDisk

70/30 Mixed Workload Test (Sledgehammer)

 

Version and / or Patch Used: Iometer 2014

 

Heavy Workload Model

 

This test hammers a drive so hard we've dubbed it "Sledgehammer". Our 70/30 Mixed Workload test is designed to simulate a heavy-duty enthusiast/workstation steady-state environment. We feel that a mix of 70% read/30% write, full random 4K transfers best represents this type of user environment. Our test allows us to see the drive enter into and reach a steady state as the test progresses.

 

Phase one of the test preconditions the drive for 1 hour with 128K sequential writes. Phase two of the test runs a 70% read/30% write, full random 4K transfer workload on the drive for 1 hour. We log and chart (phase two) IOPS data at 5-second intervals for 1 hour (720 data points). 60 data points = 5 minutes.

 

sandisk-x400-1tb-sata-iii-ssd-review_47

 

 

What we like about this test is that it reflects reality. Everything lines up, as it should. Consumer drives don't outperform Enterprise-Class SSDs that were designed for enterprise workloads. Consumer drives based on old technology are not outperforming modern Performance-Class SSDs, etc.

 

Because of its capacity, the X400 takes longer to drop into a steady state resulting in higher average IOPS than the rest of the SSDs in our test pool. The X400 displays much less variability (tighter pattern) than the competition, which is what we want to see.

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