Assistance - Calling all Samsung EVO owners

Same for the CPU usage.

As I suspected my drive seem's to be okay when I ran the HDtune test with the CPU running realbench.

So I thought for a moment you might be on to something Wazza but I re-ran the test on HDtune with no CPU usage and the drop has gone.

That is why I was reluctant to post a screenshot until I was sure it was the problem coming back.

So watch this space I did an AIDA run and I saw it again but I'm not convinced just yet.

Until I see consistent trough's which are more than a blip I'm not posting anything because it could be a red herring.
 
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I decided to bite the bullet and do an image/secure erase/restore.

Before:

samsung_evo_1.jpg


After:

samsung_evo_2.jpg


Don't forget I'm running on SATA2 hence the low max rate, but looking very much better than it did before. And the PC definitely feels more 'snappy' again.

I'll also monitor and see if it starts to deteriorate. If it does, and if Samsung don't come out with a fix then it (and the other EVOs which I have bought for other machines) will be going back under the Sale of Goods act as 'faulty'...
 
n737q.jpg


here's my aida disk benchmark,seems perfect,i wouldn't move any open windows around though as it made the graph dip a lot,just sit and let it do its thing,dont move the mouse or anything
 
You forgot to change the block size wazza

Go up to the top and options change the block size to 64KB

it's set to 8mb in that screenshot.

HDTune uses 64KB blocks.
 
I`ve just done a bit of remote maintenance on a customer's PC I built a couple of weeks ago (had to install a scanner driver).

He allowed me to test his 250gb Evo, which has about 35gb space used. The install was "cloned" onto the SSD, but without secure erasing beforehand.

HD Tune displayed a a fair few spikes (dropping to around 150 Mb/s). This machine has had very little use since I delivered and installed it.

I shall be paying a visit tomorrow to carry out a backup/erase/restore. I'll collect before and after graphs, then keep an eye on how it performs over the next few weeks.
 
wazza300 said:
test it first before you secure erase it while stressing the cpu

just curious to see the results
Click to expand...

Will do.


I should have saved and posted his graph, but I forgot. Trust me, it was a bit "messy".

I'm going to try to realign it with that Mini Tool Partition app before I do anything. After restoring mine with EaseUS Todo, I ran Mini Tool (never used it before) and it suggested that there was an alignment issue, even though other tests showed that alignment was correct.

My Evo continues to produce good benchmarks, and it's had a fair amount of (ab)use. The only conclusion I can come to so far is that these Evos need to be secure erased before use.

That's another theory that will probably prove incorrect !
 
If you have any specific tests you'd like me to carry out, I'm open to suggestions.

My current plan is:

1) Run the test.

2) Run Prime95 and test.

3) Use Mini Tool Partition Wizrd and carry out realignment if required, then test.

4) Backup, secure erase, restore, test.
 
Radeon123 said:
Just tested my grandfathers Evo 840 250gb, bought it a few days before mine, it's only 3 weeks old and came with the latest firmware already installed. It was a clone from a 750gb mechanical HDD.

It's showing massive drops in HD Tune 5.50. I am now have to fix this one as well.
Click to expand...

Forgot to update.

Laptop refused to boot the Samsung secure erase tool from a CD/DVD and USB stick, no idea why. I ended up making a Parted Magic boot CD and doing a secure erase with that instead. Once the drive was erased, I restored the image I backed up with the EaseUS boot CD.

Didn't need to align the partitions this time (had to when I did mine).

Ran another test with HD Tune 5.50 and the graph was nice and smooth.

So far after 5 days (24/7 use) since I secure erased and restored mine, my 1 TB 840 Evo is still producing nice smooth graphs so far.
 
Similar here.

My Evo has had a bit of stick since I did the secure erase. The graph is still fairly smooth. I can't see any reason it would now start to deteriorate. I`ve been using my PC as normal, and also added and deleted some pretty large files and folders.

It's odd. I think the visit to my customer tomorrow might start to reveal some answers.
 
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wazza300 said:
looks ok but overall speads are around 350mb,they should be higher

you in ahci mode in bios for sata ports?
Click to expand...

Good point, changed to AHCI and gained like 30 MB/s average, but still not enough to stop it going back :D
 
nothing wrong with that drive to be honest. My drive looks the same with that initial slow tiny drop.

Looks clean and healthy.

Nothing like those that have had performance issues they had several drops to 50MB/S that spanned several GB's of data.
 
I`ve got a load of info on the way.

I didn't manage to visit the customer with the Evo 250gb, but I've got another customer's laptop here with a "poorly" 120gb.
 
Before





(I stopped the test, it predicted over 30 minutes to finish)


Then I used MiniTool Partition Wizard to realign the partitions (not that they were misaligned)



Same with Prime95 running



After the secure erase and restore



I also carried out another realignment, but that made no difference.

Here's the interesting thing

 
Those are interesting and I would be more inclined to trust AIDA to be honest.

I wonder if you had re-run the HDTune Pro you would have seen anything different.

Was rapid enabled? Wondering if some caching is helping to tidy the graph. Wild suggestion.

Definitely see that running prime doesn't help any more than making sure the CPU stays in it's full power state which increases performance.

The "poorly" drives are still very much an issue but we are no closer to figuring out how they get in a "poorly" state but it is obviously happening to every drive. We've tested too many and not one has come back okay.

So question is how long does it take to get "poorly" .

Tested both my drives again today and both showing okay or within what I would expect for a normal drive.

It is interesting that all the poorly drives show an increase in access time and if you had ran the iop's test in hdtune I'm pretty sure that wouldn't have been good either.
 
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