SSD Poor transfer speeds

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janplank

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Hi,
I am posting this in the hopes that someone might shed some light on the issue I have at hand.
I have a Desktop PC(running windows 10) which has 3 drives installed. One SSD for OS, one hdd for data and another ssd (m.2 sata) for VMs.
The SSD hosting my VMs was good and all till recently I tried to copy over the VMs to another machine.

The m.2 sdd is a WD Blue SATA SSD M.2 2280 with model no WDC WDS500G2B0B-00YS70 and latest firmware.

Now if I copy to the drive the speeds are good. If I read from the drive (copy data to another drive) it is slow as hell, 2-10MB/s. SMART data show no issues. Crystal Disk Mark shows good results. Even with 32GB files.

I even plugged the SSD into a NUC thinking these is a problem with the port. Same result!
I tried to copy using non windows tools. Still slow speeds.
I tried to search the web for some problem but did not find anything useful. I suspect the drive might be shot???
Sometime the speed might start good but then goes down quickly. Is this a result of cache???
This is driving me crazy... With all the power cuts in our town, I cannot complete these tasks.I have a ups but power goes off for 3 hours+ due to lack of maintenance. I am not at home and the pc goes off.

I usually gets things soreted out but not this time.

Maybe someone on this forum has any ideas?

1639763603024.png

1639763667852.png
1639764206774.png
 
Install this and see what it says?
support.wdc.com

WD Software

List of all WD firmware and software available for download.
support.wdc.com

Maybe you need a firmware update?

Has the drive not reached its endurance limit maybe?
 
Software is already installed. Drive health 100%. I have an older Samsung ssd as my c drive runnig os.
 
Clone SSD to another HDD/SSD (or move VMs off), format, and test. If still slow, test on another PC. If also still slow, return for warranty listing symptoms and troubleshooting steps.
 
May check the performance from a linux livecd/usb in order to eliminate windows issues, if it still performs kuk then maybe the drive is bad despite your diagnostics.
 
Test 1.jpgTest 2.jpg

The Sweet power of AMD Ryzen...

But seriously, Crystal mark is bugged. My CPU runs 100% and data speeds drop.
 
The op's speeds are pretty much sata SSD speeds, is he sure the MBB M.2 port isn't a sata M.2, apparently an Nve drive can run in a sata M.2 slot, it just defaults to the SATA speed.
 
ponder said:
May check the performance from a linux livecd/usb in order to eliminate windows issues, if it still performs kuk then maybe the drive is bad despite your diagnostics.
Click to expand...
I tried cloning the disc using Acronis. But think the boot cd was created using WinPE. Not sure if it counts as non Windows operation. Clone took over a day and power went off while at work so not sure if the backup was completed 100%.
 
airborne said:
The op's speeds are pretty much sata SSD speeds, is he sure the MBB M.2 port isn't a sata M.2, apparently an Nve drive can run in a sata M.2 slot, it just defaults to the SATA speed.
Click to expand...
My motherboard is the MSI Tomahawk Z170A

Specification Z170A TOMAHAWK

As a world leading gaming brand, MSI is the most trusted name in gaming and eSports. We stand by our principles of breakthroughs in design, and roll out the amazing gaming gear like motherboards, graphics cards, laptops and desktops.
www.msi.com www.msi.com

If I am not mistaken the WD Blue is also a SATA m.2 drive. Even though, I should not get these low speeds.
 
janplank said:
My motherboard is the MSI Tomahawk Z170A

Specification Z170A TOMAHAWK

As a world leading gaming brand, MSI is the most trusted name in gaming and eSports. We stand by our principles of breakthroughs in design, and roll out the amazing gaming gear like motherboards, graphics cards, laptops and desktops.
www.msi.com www.msi.com

If I am not mistaken the WD Blue is also a SATA m.2 drive. Even though, I should not get these low speeds.
Click to expand...

From some google searches your drive has very little DRAM cache if any (WD is not very transparent when it comes to this from what I can see, which also raises an eyebrow), this is why you getting good speeds at 1st but then it slows down as per your screen is because of the DRAM cache or lack there of IMHO.

1639805631937.png

Also looking at your benchmarks you can see that some of your speeds are similar to your above screenshot.

1639805981783.png
 
Last edited:
The SSD is about 2 years old. This drive is actually useless. Good for writing and reading files < 5mb. I read something about the cache but was not sure since it not widely used term. Will research a bit more. So consensus is that the drive is OK but has some hardware limitations? I have a few ssds now and none of them behave like this. It is full speed all the way.
 
janplank said:
The SSD is about 2 years old. This drive is actually useless. Good for writing and reading files < 5mb. I read something about the cache but was not sure since it not widely used term. Will research a bit more. So consensus is that the drive is OK but has some hardware limitations? I have a few ssds now and none of them behave like this. It is full speed all the way.
Click to expand...
How does it perform when transferring lots of docs/pics/smaller vids?
 
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