Toshiba HK4E SATA 1600GB Enterprise SSD Review

SNIA Latency Test

The Latency Test measures average and maximum response times
using random IOs at specified Block Sizes and Read/Write mixes, taken under
steady state conditions.  The test runs at a Queue Depth of 1 (1 outstanding
IO), thus the results give the baseline response time for a single IO request.

The test also reports maximum latency values, which can be
helpful to see if there might be processes within the drive that may cause max
Latency values to become larger.

Here are the results –

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Toshiba HK4E SATA 1600GB Enterprise SSD Review

You can see here that Steady State was achieved in Round 1 through
Round 5 (the ‘Measurement Window’). Note that the 4K Write line is used to
determine the achievement of steady state.

Toshiba HK4E SATA 1600GB Enterprise SSD Review

These are the Average and Maximum Latency Values observed in
each round of the Measurement Window (measured in Milliseconds).

 

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Toshiba HK4E SATA 1600GB Enterprise SSD Review

Here is a 3D graph showing, at a glance, the Maximum Latency
values for each combination of Read/Write Mix and IO Size.

 

Toshiba HK4E SATA 1600GB Enterprise SSD Review

Here is a 3D graph showing, at a glance, the Average Latency
values for each combination of Read/Write Mix and IO Size.  These are excellent
results.

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SNIA Throughput Test – Product Comparison

For interest we present a comparison of the 4K 65% Reads 35%
Writes latency results in comparison with those of the other Enterprise SSDs we
have tested –

Toshiba HK4E SATA 1600GB Enterprise SSD Review

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This is an excellent result.

 

Toshiba HK4E SATA 1600GB Enterprise SSD Review

This is a good
result which bodes well for the drive’s Quality of Service, which we will look at
more closely on the next page.

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Now let’s head to the next page, to look at the results
for the Myce/OakGate 4K Read and Write Latency Tests……

 

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