Seagate 1200 400GB SAS Enterprise SSD Review

IOPS performance will typically vary greatly depending on
the nature of the IO traffic, including the mixture of Read and Write
operations, and the mixture of Block Sizes (the size of the IO operation’s data
packet, also referred to as IO Size). This test is designed to benchmark the
IOPS performance profile for random IO operations for 56 different combinations
of Read/Write mix % and Block Sizes when in a Steady State, which are of
interest to most users.

All of the SNIA’s test specifications define a ‘required’
set of parameters that must be run for the test and then allow the operator to
elect to run additional tests with different parameters of their choice. It is
the mandatory test with the required parameters that we run. Note that all of
the mandatory SNIA tests must be conducted with fully random data

As previously mentioned, a key
principle of SNIA testing is to provide a consistent basis for comparing
different solutions from different manufacturers.

Here are the
results –

 

Seagate 1200 400GB SAS Enterprise SSD Review

You can see
here a visual confirmation that Steady State Convergence was determined at the
end of Round 5.


 

Seagate 1200 400GB SAS Enterprise SSD Review

Seagate 1200 400GB SAS Enterprise SSD Review

Here is a 3D and tabular presentation of the results. Users
can simply refer to the grid to obtain the R/W mix and Block Size value of
interest.  For example, Online Transaction Processing applications
typically run at a Block Size of 8K and a Read/Write Mix of 65/35, and users
can quickly understand how the device might perform under Steady State for
these access characteristics.

You can see that the 4K 100% Read IOPS result is 86,851 (that
is well below Seagate’s specification of 110,000) and that the 4K 100% Write
IOPS result is an excellent 40,693 (that exceeds Seagate’s specification of
40,000). 


Product
Comparison

For interest
we present a comparison of the 4K 100% Writes and Reads results 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, where we look at the results of the SNIA Write
Saturation Test…..