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Plextor M5 Pro 256GB PX-256M5P Solid State Drive Review

By: Chris Ramseyer | SSDs in Storage | Posted: Aug 7, 2012 2:19 pm
TweakTown Rating: 93%Manufacturer: Plextor

PCMark Vantage - Drives with Data Testing


For a complete breakdown on the Drives with Data Testing please read this article. You will be able to perform this test at home with the files provided in the article - full instructions are included.


- Brief Methodology


SSDs perform differently when used for a period of time and when data is already present on the drive. The purpose of the Drives with Data testing is to show how a drive performs in these 'dirty' states. SSDs also need time to recover, either with TRIM or onboard garbage collection methods.


Drives with Data Testing - 25%, 50%, 75% Full States and Dirty / Empty Test

Files needed for 60 (64GB), 120 (128GB), 240 (256GB)

60GB Fill - 15GB, 30GB, 45GB

120GB Fill - 30GB, 60GB, 90GB

240GB Fill - 60GB, 120GB, 160GB

Empty but Dirty - a test run just after the fill tests and shows if a drive needs time to recover or if performance is instantly restored.




Well this is quite stunning. The Plextor M5 Pro is actually slower after light use than the M3 Pro. I say this with sarcasm because yet again we found another SSD that isn't running TRIM efficiently. If you look at the TRIM run on the M5 Pro you see that the drive lost another 5K Marks between the light use run and the 75% of capacity data purge.




After all of the tests were completed I secure erased the drive to see what was going on. I headed right back to PCMark Vantage and ran the test on clean flash. Straight away we surpassed the M3 and M3 Pro's numbers and reached the highest score in Vantage yet.


It appears the Plextor M5 Pro has a big of an issue with TRIM because the drive isn't recovering as quickly as it should which is as fast as we delete data. Unlike LSI SandForce drives, the M5 Pro has background garbage collection so when your system is idle the drive cleans itself up.

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