Assistance - Calling all Samsung EVO owners

Don't think the drive itself is faulty - just the controller struggling with the unexpected degradation - I'd been monitoring some old data locations for awhile watching them get slower and slower, ECC kicking in more and more and then eventually random read failures - after secure erasing, etc. those "bad" locations that hadn't quite yet been retired as failing blocks were back to working as normal and no issues at all aslong as the data in them was refreshed every ~8 weeks. If it had gone on much longer I'm fairly convinced I'd have lost data on the drive.

I have pushed my drive more than is typical (not sure why that seems to have made it worse though) - if I hadn't moved some of the heavier stuff over to the Kingston after running into the whole performance degradation thing I'd be upto about 25TB of writes on it by now.

EDIT - quite a difference with mine heh:

Before:
mMetq3Q.png


After:
ZC9Av0B.png
 
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Wazza, the "before" doesn't look too bad considering it wasn't powered up for 4 months (I assume it was in roughly the same condition when it was last used).

Was the "after" test done immediately after updating the firmware, and without any refreshing of data ?
 
yh,i did run performance optimisation on it though

but no secure erasing,just updated magician,then fw then ran optimisation then hdtune
 
wazza300 said:
The advanced one,the normal one wouldn't work for me on windows 8,says not compatible
Click to expand...

Thanks.

I was just interested to know if the new firmware restores the performance on it's own, or if rewriting the data did the trick.

I have found that there is usually an immediate improvement in the benchmark results, but it doesn't always bring the performance back fully straight away. I`ve still got a few more to update, so I'll be keeping on eye on what happens.
 
My drive had started showing some real lag problems in the past week so I started reading and came across this thread, here is a picture diary of what happened next:

Starting point
9Il1Szs.png


After a firmware update:
osxaTXx.png


Enabled AHCI then ran standard optimisation:
Rne15xu.png


Finally ran the advanced optimisation:
wB16Cm6.png


Wow what a difference after the final one! Have I missed anything?
 
ok so, i have one of these, what firmware should i be on? will magician automatically let me know there is a new version out? or do i need to go hunt for it? magician tells me i'm running EXT0BB6Q firmware. is Samsung doing anything about this?
 
When i run Samsung Magician tests on my 250GB SSD the write speeds are disgustingly low, it happened a few weeks after getting it and i could never fix it, sometimes the write speeds are fine but the randoms are in the tiny tiny ranges. However Crystal Mark always gives me high tests regardless and my new SSD is fine on Samsung Magician that i just installed, shows the fastest speeds possible. no idea.

e16a484ddf.png


b320ccdc7e.png


52d1cddc89.png
 
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Are you 100% sure it's the latest, what does it list it as?

Tried another SATA cable? Is it on an Intel SATA port? (if not, move it to one)
 
The 850s seem to not suffer from it. To early to rule it out conclusively but enough difference in the design it shouldn't suffer from the same issue.
 
Performance still good after a couple of months......



Looks like the new firmware did do the trick.

Magician is not reporting a sudden increase in data writes either.

Unless Samsung have pulled a fast one, it looks like the 840 EVO was a decent purchase.
 
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