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6 Posts

11-02-2015

Holland

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Performance degradation of Y2P SSD 256GB

2015-11-02, 21:30 PM

I use my Yoga2Pro for about a year now. 

Great laptop, especially with the screen resolution options in Win10.....

 

But I noticed the backups were taking up more time as I was using the laptop for a longer time.
When I checked the write read with Crystal Diskmark it all seemed ok: 490 MB/s read and 230 MB write.

But at same parts of the backup I saw the SSD disk was reading at 200 MB/s.

 

When I installed Windows10 the backup speed was back to the 490 MB/s read speeds.

But a few weeks further I see a gradually degradation of the SSD performance.

Again....

 

Somebody pointed me out the SSD is a Samsung OEM (MZMTE256HMHP aka PM851) with the same TLC NAND as the 840 EVO series. For that serie a new Samsung firmware ihas solved the degradation as the information is aging on the disk.

 

When will Lenovo release a solution for this problem ?

 

Or do I have to do a backup/recover cycle myself on a monthly basis?

As only that procedure now seems to provide a solution for my $1000,- product ..

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142 Posts

01-01-2014

georgia

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Re: Performance degradation of Y2P SSD 256GB

2015-11-03, 2:05 AM

From your start menu enter Optimize, and the Defragment and Optimize app will appear. Run that app. Under your C: Drive, when was the last time a Trim operation was performed? Normally it runs every week or so but it may be disabled for some reason. If it hasn't been run in a long time go ahead and click Optimize and set it to run weekly. Without trimming your drive you may experience slow down over a period of time. If it is still slow after optimizing then it may be due to some other cause.

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6 Posts

11-02-2015

Holland

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Re: Performance degradation of Y2P SSD 256GB

2015-11-10, 9:19 AM

Optimize is turned on (weekly), so also Trim is being performed...

I formatted the Samsung SSD again and restored the Win10 image.
Everything up to speed again.

From last week on I weekly copy a large 4GB file to my PM851 and test the speed to copy it to an external USB3 SSD.
Every week I will add a new file and also repeat the copy action of the 1st file to see when the **bleep** hits the fan: performance degradation as the NAND over time become harder to read.

Samsung is not willing to give an firmware upgrade on this OEM product.

They claimed Lenovo should...


So we need some more prove to make Lenovo keep their obligations.

You all could help me by performing this simple test too.

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6 Posts

11-02-2015

Holland

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Re: Performance degradation of Y2P SSD 256GB

2015-11-13, 8:42 AM

I've found that both Dell and Microsoft were using the same Samsung PM851 SSD, only the naming is slightly different
MZMTE256HMHP-000L1 Lenovo
MZMTE256HMHP-000D1 Dell
MZMTE256HMHP-000MV Microsoft

Both Dell and Microsoft released new firmware version for these drives, as they also suffered the same problem.
The TLC VNAND voltage drops over time and the controller suffers in reading/guessing the data in the triple bit. This causes the Read performance to drop for older non changed files like OS files or video source files.
Myself I even had a dll file that could not be read anymore, causing my Windows to crash.

For this reasonI had to recover Windows on the C: partition ...

So I lost confidence in this drive, even while my data is mostly in the cloud and backuped locally every 2 hours.

I pushed the local Lenovo service organisation, but they don't seem capable of understandjng the problem.

So I can't expect a solution from them....


Anyone ideas on how to move on with Lenovo?


They did solve it for their Thinkpad business laptops.

Untill now not for our Yoga2Pro, maybe because nobody understands the problem?

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6 Posts

11-02-2015

Holland

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Re: Performance degradation of Y2P SSD 256GB

2015-11-24, 20:19 PM
After 10 days waiting without being called back as was promised, I called Lenovo support.
As my Win10 ha crashed for the second time: some OS files were corrupted..

Lenovo took about 15 minutes to reply me there will be no solution from their support team for this problem.
So after the money back return of my Yoga 2 13 due to Wifi problems I now may send my Yoga2Pro back as the OEM Samsung SSD is not reliable anymore.

Dell and Microsoft applied a firmware update for this problem; Lenovo decided not to do so for the Yoga series.

It should make my decision for the XPS 9350 so easy. But my heart melted again when I used the Yoga 900 for a few minutes.

When will I learn:
a Yoga is nor a buainess took, it's a way of living ....

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