Hi all
Was recently thrilled to see the Samsung 850EVO 1TB mSATA option for my 2012 MacBook Pro which didn't cost the earth (via an adaptor) so went ahead and bought. Sadly only after did I come across the performance consistency problem raised by AT in their review http://www.anandtech.com/show/9023/the-samsung-ssd-850-evo-msata-m2-review/2
I did read in another forum of someone replicating the test but not encountering the issue. However, in running the Blackmagic Disk speed test I have seen some unusual behaviour. When I run the 5GB stress test the write speed performs consistently for quite a few cycles at around 500MB/s but if left for longer it then starts to slow down quite dramatically with each new cycle, quickly ending up in the sub 100s. I did a check with an external RAID0 setup (4x4TB HD) to make sure it wasn't a software issue but it consistently wrote at around 500MB/s and never experienced any drop-off when left cycling the test.
Would the above test point seem to be pointing to the same issue as identified by AT in their test? Also could someone tell me the specific software they use so I could replicate it (apologies if I missed that in the article, am new here)? Or a Mac equivalent in case their test software only works on Windows? It is specifically the 4KB random write (QD32) performance test over time which reveals the issue.
Many thanks for any help
Ross
Was recently thrilled to see the Samsung 850EVO 1TB mSATA option for my 2012 MacBook Pro which didn't cost the earth (via an adaptor) so went ahead and bought. Sadly only after did I come across the performance consistency problem raised by AT in their review http://www.anandtech.com/show/9023/the-samsung-ssd-850-evo-msata-m2-review/2
I did read in another forum of someone replicating the test but not encountering the issue. However, in running the Blackmagic Disk speed test I have seen some unusual behaviour. When I run the 5GB stress test the write speed performs consistently for quite a few cycles at around 500MB/s but if left for longer it then starts to slow down quite dramatically with each new cycle, quickly ending up in the sub 100s. I did a check with an external RAID0 setup (4x4TB HD) to make sure it wasn't a software issue but it consistently wrote at around 500MB/s and never experienced any drop-off when left cycling the test.
Would the above test point seem to be pointing to the same issue as identified by AT in their test? Also could someone tell me the specific software they use so I could replicate it (apologies if I missed that in the article, am new here)? Or a Mac equivalent in case their test software only works on Windows? It is specifically the 4KB random write (QD32) performance test over time which reveals the issue.
Many thanks for any help
Ross