Toshiba XG6 1024GB NVMe SSD Review

Posted 11 October 2018 17:11 CET by Jeremy Reynolds

Desktop PC – Synthetic Benchmarks

AS SSD

As its name suggests AS SSD was developed specifically to measure the performance of SSDs.  It measures Sequential Read and Write performance with an IO Size of 16MB and a Queue Depth of 1. It measures Random 4K Read and Write for a Queue Depth of 1 and for 64 Threads. 64 Threads generates a Queue Depth of 64 (please note that SATA drives support a maximum Queue Depth of 32, so they are at a disadvantage in this test to NVMe devices, which support queue depths of 128 or more).  The Access Time AS SSD reports is for 512Byte sequential reads and writes.

The 4K random Reads and Writes performance is particularly relevant to a drive’s ability to act as a Windows system drive. I use the default test file size of 1GB.

AS SSD produces a score for Read Performance, Write Performance and an Overall Score.

The scores are calculated as –

Overall score = (Seq Write x 0.15) + (Seq Read x 0.1) + (4K Read * 2) + 4K Write + 4K-64Thrd Write + (4K-64Thrd Read * 1.5)

Read score = (Seq Read * 0.1) + 4K Read + 4K-64Thrd Read

Write score = (Seq Write *0.1) + 4K Write + 4K-64Thrd Write

For Client SSDs, I feel that there should be an even greater loading given to the Queue Depth 1 4K Read and 4K Write results but nevertheless AS SSD is a quick and useful benchmark. I always use a 1GB test file. We would expect a modern SATA SSD to achieve an overall score of 1000+.

The latest version of AS SSD can be downloaded here.

Here is the AS SSD result for the Toshiba XG6 –

 

 

 

Here is a comparison of the overall AS SSD score with the other products I have tested –

An excellent score.

 

Anvil’s Storage Utilities

Anvil’s Storage Utilities tests Sequential Reads and Writes with an IO Size of 4MB, Random 4K Reads and Writes at Queue Depths of 1, 4 and 16 and Random 32K and 128K Writes. 

The scores are calculated as –

Overall Score = Read Score + Write Score

Read Score = (Seq 4MB = MB/s x 1) + (4K = MB/s x 4.5) + (4K QD4 = MB/s x 2.75) + (4K QD16 = MB/s x 1.75) + (32K = MB/s x 1) + (128K = MB/s x 1.5)

Write Score = (Seq 4MB = MB/s x 1) + (4K = MB/s x 4) + (4K QD4 = MB/s x 3) + (4K QD16 = MB/s x 3)

I always use a Test size of 1GB and 100% Incompressible data.

The latest version of Anvil’s Storage Utilities can be downloaded here.

Here is the Anvil result for the Toshiba XG6 –

Here is a comparison of the Anvil Total score with the other products I have tested –

Another excellent score.

Crystal Disk Mark

Crystal Disk Mark is a widely respected benchmark, which is often used by manufacturers as a basis for publishing their ‘headline’ sequential read and write speeds.  I always run the test with One Thread and a Queue Depth of 32 (which generates a Queue Depth of 32, being the maximum Queue Depth supported by SATA drives), a 1GB test file, Random data and 3 or 5 passes. The benchmark performs sequential IO with an IO Size of 512K for the Seq Q32T1 test, sequential IO with an IO Size of 1MB for the Queue Depth 1 Seq test and Random IO with an IO Size of 4K for the 4K (Queue Depth 1) and the 4K Q32T1 test. 

Crystal Disk Mark can be downloaded here (I use the standard edition).

Here is the CDM result for the Toshiba XG6 –

You can see that the headline Sequential speeds, as specified by Toshiba, of 3,180 MB/s Read and 3,000 MB/s Write have both been exceeded in this test.

ATTO

The ATTO benchmark tests Sequential IO for a large range of IO Sizes. I always run the test with the default Queue Depth of 4.

ATTO can be downloaded here.

Here is the ATTO result for the Toshiba XG6 –

 

Here, the headline Sequential speeds, as specified by Toshiba, have both been exceeded.


Now let’s head to the next page, to look at the results for the Desktop PC Real World Benchmarks…..