05-10-2015 07:07 AM - edited 05-10-2015 07:11 AM
I was not sure if I should have used an existing topic, so here it goes.
I have been using an MX100 as Windows disk for about 6 months with no working problems. It has around 30% occupied space. Yet, I went to benchmark it using HD Tune and got this:
I realized it still had firmware MU01 on it, so I updated it using the Storage Executive software, but only got a slight improvement:
Now the funny part. I shrank the Windows partition to free the first 100GB of the drive, created a partition with those 100GB, wiped/wrote over that space using CCleaner (wipe free space option) and then expanded the Windows partition to take back the 100GB. The results are interesting:
It seems to me that the low read rates match the zones were data is stored.
The high CPU usage is due to simulations being run at the time (MATLAB). I ran the benchmark after that (5% CPU usage) and got the same results.
So, is this normal? Shouldn't TRIM being doing something here?
Intel Core i5 4590
ASRock H97M Pro4
XFX 450W Core
2x4GB GSkill Ares DDR3 1600
Windows 7 SP1 x64
05-10-2015 07:37 AM
Increase your test block size in HD Tune's options.
05-11-2015 08:34 AM - edited 05-11-2015 08:49 AM
I did that (from 64 kB to 1MB and 8MB) and the results improved:
Well, I don't understand if this is normal/expected, but I will leave these here for reference.
I personally was expecting the blue curve to be mostly flat, even in the regions where data is being stored.
05-11-2015 09:01 AM
From what I saw Marvell driven SSDs from Crucial benchmark this way in HD Tune (Pro) so I would say it is normal and to be expected.
This type of benchmark may be dependent on system type (laptop vs desktop) and power options (for example 'high performance' plan vs 'balanced').
If you want smoother curve you should choose 'Full test/Accurate' in options.
Also typically setting power plan to 'High performance' rise your speeds by about 15-20 MB/s.
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