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WD2003FZEX Samsung and ATTO benchmarks different between 2 drives

post #1 of 4
Thread Starter 
I have 2 identical WD WD2003FZEX 2TB drives with very different benchmarks.

I built a new rig this past July and bought a Western Digital Black WD2003FZEX 2TB drive for general purpose storage. When it was new, I ran the Samsung Magician benchmark on it. A few days ago I bought another identical drive (good sale on Amazon) which I just installed today. I ran the Samsung Magician benchmark on this new drive and compared it to the one I bought in July. I am getting much better readings on the new drive.

So I ran ATTO on both of them - all parameters default. The images below are what I am seeing. Both drives have a single GUID partition. The old drive has 118GB of data on it. The new drive is completely empty. Samsung Magician shows that the first drive is considerably slower than the second one, and it's performance has decreased since the benchmark I ran when it was brand new. ATTO is new to me so I am reading up on how to interpret the numbers but I do understand that higher read and write speeds are better...

The numbers tell the story better than I so here they are. Is it normal to see this much variation between 2 identical products? And is it normal to see a platter drive's read and write speeds deteriorate like this? Does the fact that the old drive has some data on it affect the benchmark? Thanks in advance.

Samsung Benchmark Comparison - New Drive (Top) and Old Drive (Bottom)


ATTO Comparison - Old Drive (Left) and New Drive (Right)


Samsung Benchmark - Random R/W Old Drive - 07-10-2016 - 10-08-2016


Samsung Benchmark - Sequential R/W Old Drive - 07-10-2016 - 10-08-2016


Edited to add CrystalDisk Benchmarks

Crystal Disk Old Drive


Crystal Disk New Drive

Edited by SpeedyIV - 10/8/16 at 8:31pm
Speedy IV
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Speedy IV
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post #2 of 4
@OP

First and foremost, I wouldn't place any trust in those Samsung benchmarks, it looks like something (caching?) is throwing them off - nobody gets 342MB/s reads from a hard drive's platters, so I suspect those numbers are from the hard drive's buffers.

As for the other benchmarks, I'd say that the newer drive has had some improvements; better firmware, maybe slightly higher platter density (doubt it though), better overall engineering or all of the above. smile.gif
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post #3 of 4
Thread Starter 
Thanks for your response. Perhaps you are right about the Samsung Magician values being too high. Nonetheless, 3 different hard drive benchmarks all show that the older drive is much slower than the new drive. Samsung Magician also shows that the old drive's performance has deteriorated since the first benchmark I ran in July. Both of these drives came from Amazon, both looked factory sealed, and both showed zero hours of use in their SMART data. They are both WD model WD2003FZEX.

I suppose it is possible that the new drive is from a later batch and has newer firmware. I guess I will look into how to determine what firmware each drive has and if it can be updated by the end user. I found a Western Digital drive firmware updater utility but it seems to be intended for USB drives. Is it possible that the performance could be caused by which SATA port they are connected too?

Again, thanks for any responses.
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post #4 of 4
@OP

Benching them against other SATA ports is a good idea actually... smile.gif
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