Seagate 1200 400GB SAS Enterprise SSD Review

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 –

Seagate 1200 400GB SAS Enterprise SSD Review

You can see
here that Steady State was achieved in Round 10 through Round 14 (the
‘Measurement Window’).


 

Seagate 1200 400GB SAS Enterprise SSD Review

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


 

 

Seagate 1200 400GB SAS 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.


 

Seagate 1200 400GB SAS 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.  The 100% writes results are excellent. 


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 –

 

Seagate 1200 400GB SAS Enterprise SSD Review

Seagate 1200 400GB SAS Enterprise SSD Review

 

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