Speed degradation after heavy testing
On this page I will test how the SSD performs after heavy
testing and usage.
I now have a new policy as to how I go about testing an SSD.
In the past I would deliberately try and get an SSD into a “used state”, by
filling the drive several times before starting the tests. This seemed to work
quite well up until the SandForce based SSDs appeared, but because of the way
the SandForce controller works, it was near impossible to tell if deliberately
trying to get a SandForce based SSD into a “used state” had actually worked on
A new strategy was required. So now I begin the tests with
the SSD in a clean state and allow it to look after itself during the testing
period. I start off the tests by running HD-Tach read/write test. This gives me
the “as new” reading and writing performance of the SSD.
Once all the tests have been completed, the drive is then tested
as a system drive, and just used normally for many days (which is something I
have always done with a review sample). At the end of the period, the drive is
filled to capacity and then all files are deleted from the drive and then the
partition is also deleted.
The last test is a rerun of the HD-Tach read/write
benchmark, and the result from the final test compared with the first run of
HD-Tach when the SSD was in an “as new” state.
The results are below.
New state Plextor PX-256M2S
Used state Plextor PX-256M2S
There is no real evidence of speed degradation after some
very heavy testing, in fact the average reading speed is slightly higher and
writing speeds have only dropped by approximately 4MB/s at the end of the
If this is an indication of how this SSD will perform in the
long term, then it would pretty safe to say that Plextor “Instant Restore
Technology” is very effective indeed at keeping the drive operating at, or very
near to its “as new” state.
This concludes our preview. To read the final thoughts
and conclusion, click the link below….