Samsung 860 PRO 256GB SATA SSD Review

Samsung 860 PRO 256GB SATA SSD Review

OakGate Platform – ‘Fresh out of Box’ Tests

These tests provide a highly consistent basis for comparing
solutions.  The sequence of tests begins with a purge of the drive to ensure
that it starts in a FOB state.

The tests cover all of the essential IO performance
characteristics.

Sequential Writes

This test performs 20 seconds of Sequential Write IOs for
each combination of Queue Depths 1, 4, and 32, and IO Sizes of 4K, 128K, and
1024K.  IO traffic is limited to an IO Range of 1GB (which is equivalent to a
test file size of 1GB).

Here are the results for the Samsung 860 PRO –

Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review

Here is a comparison of the 1024K, Queue Depth 32,
Sequential Write performance with the other products I have tested to date –

Samsung 860 PRO 256GB SATA SSD Review

This is an excellent result which exceeds Samsung’s
specification of 520 MB/s.

Let’s also have a look at how the Sequential Writes Power
Consumption compares, but to do this fairly we must divide the average MB/s by
the average Milliwatts to get a value for the effective work done.  Here is the
result –

Samsung 860 PRO 256GB SATA SSD Review

You can see that the Samsung 860 PRO has an outstanding
level of power efficiency.

Sequential Reads

The test performs 20 seconds of Sequential Read IOs for each
combination of Queue Depths 1, 4, and 32, and IO Sizes of 4K, 128K, and 1024K. 
IO traffic is limited to an IO Range of 1GB.

Here are the results for the Samsung 860 PRO –

Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review

Here is a comparison of the 1024K, Queue Depth 32,
Sequential Read performance with the other products I have tested to date –

Samsung 860 PRO 256GB SATA SSD Review

This is an excellent result for an SATA drive. Just like the
WD Blue 3D and the Samsung 860 EVO, the Samsung 860 PRO is pushing to the very
limit of the SATA Bus bandwidth and it exceeds Samsung’s specification of 560
MB/s.

Random Writes

The test performs 20 seconds of Random Write IOs for each
combination of Queue Depths 1, 4, and 32, and IO Sizes of 4K, 16K, and 32K.  IO
traffic is limited to an IO Range of 1GB.

Here are the results for the Samsung 860 PRO –

Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review

Here is a comparison of the 4K, Queue Depth 1, Random Write
performance with the other products I have tested to date –

Samsung 860 PRO 256GB SATA SSD Review

This is an excellent result for an SATA drive.

The 4K Random Write IOPS for an IO Size of 4 and Queue Depth
of 32 was 70,000 which is a long way short of Samsung’s specified value of 90,000
IOPS.

Let’s have a look at the Latency Distribution for the 4K, QD
1 performance –

Samsung 860 PRO 256GB SATA SSD Review

This graph shows the Latency for every IO that was performed
in the 20 seconds of traffic.  It shows the Number of IOs (IO Count) that fell
within a particular period of Time (Microseconds).  The red line plots the Time
against the percentage of total IOs performed.

You can see that the Samsung 860 PRO achieves a remarkably high
level of consistency and that 99.9% of all IOs have a Latency of 40 Microseconds
or less.

Random Reads

The test performs 20 seconds of Random Read IOs for each
combination of Queue Depths 1, 4, and 32, and IO Sizes of 4K, 16K, and 32K.  IO
traffic is limited to an IO Range of 1GB.

Here are the results for the Samsung 860 PRO –

Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review

Here is a comparison of the 4K, Queue Depth 1, Random Read
performance with the other products I have tested to date –

Samsung 860 PRO 256GB SATA SSD Review

This is an excellent result for an SATA drive but falls
behind the remarkable result achieved by the Samsung 860 EVO.

The 4K Random Read IOPS for an IO Size of 4, and Queue Depth
of 32, was 86,000, which is a long way short of Samsung’s specified value of 100,000
IOPS.

4K Random Mixed Reads/Writes

The test performs 20 seconds of 4K Random Mixed Reads/Writes
for each combination of Queue Depths 1, 4, and 32, and Read/Write ratios of
0/100, 30/70, 50/50, 70/30, and 100/0.  IO traffic is limited to an IO Range of
1GB.

Here are the results for the Samsung 860 PRO –

Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review
Samsung 860 PRO 256GB SATA SSD ReviewSamsung 860 PRO 256GB SATA SSD Review

Here is a comparison of the 4K Mixed Random 50% Read/50%
Write, Queue Depth 1 performance, with the other products I have tested to date

Samsung 860 PRO 256GB SATA SSD Review

 

This is an outstanding result.


Now let’s head to the next page, to look at the results
for the Oakgate Steady State Tests…..