before:
[attachmentid=4130677]

after defrag:
[attachmentid=4130676]
here you go:

https://db.tt/M3nH7azP

yes best performance now days lyn people complaint bad performance for old files
yah but now days complaint bad performance for old files
i waiting to fix solve

TLC = Trouble right
MLC is good ??? stable ???

if you searched through results regarding samsung tlc drives getting slow with time at google, you will find that similar issues (slow drives) were reported as early as 840, but no one by then realized that this was related to the age of files, i.e. the most recent finding that can be reproduced. (and most of the questions were tagged as solved) by the way, ssd's do get slower with time. normally people will do a secure erase to regain the speed.

this is a problem with new technologies. when you adopted new technologies, it requires time to prove that it is ok, or not. time is what we don't have, especially for techs like ssd that is still in active development. (bu at the same time people are so eager to own one)

if you think it's risky, you should get old drives that are proven to still work until today. (850 pro also uses new technologies, even if it comes with 10-year warranty)

yes that's the scenario. perhaps that's also why no one noticed the particular case of 840 evo until recently.

you have ample of time to review your options. there are still many alternatives out there if you can't wait hehe.

right however, if possible dig a little deeper when you can. there are many known secrets. only for those who do just that hehe

great

many people are taking shortcuts just to ask for suggestions here. i understand to them it's all about budget. i just hope they don't swallow everything blindly.
in my case the defrag method brought back the normal speed. note that there will not be a 100% speed recovery.

forget about those marketing numbers. they are true only when the drives are fresh. in real world usage, it's the speed in steady state that matters.

yeah about reviews, they are written by knowledgeable tech guys, hence they're good as reference. however i have the impression that they only cover part of the whole story. (normally the positive part) that's why i think we need to dig deeper for more information to make better justifications hehe

right now it should be pcie based nvme ssd, examples are intel dc p3500/p3600/p3700, targeted at enterprise space.

we all know common ssd's these days are based on sata, a technology optimized for hdd (in consumer market sas and fiber channel are not common). now most sata ssd have reached speed limit. in order to break that limit certain sata ssd's offer ram-based caching. (which rely on system ram to boost its speed further; not ideal but enough to make someone happy. it's a cheap 'solution' without rising the price of ssd's).

however in terms of raw speed, ssd's need a technology optimized just for them to run better. that technology is nvme. as of now, nvme ssd's run at minimum 4x sata3 speed. if you care to know, w8.1 has native support already.

pcie based ssd have been in the consumer market for a while. (either in the form of bare m.2, or comes with pcie adapter. one example is plextor m6e). however most of them only use pcie x2, which translate to about read speed of 700MB/s. the top m.2 pcie ssd that i know of is samsung xp941 (which uses pcie x4, read speed is over 1GB/s).

now the ugly part: many told us that these m.2 ssd's are great at speed. not many told the story that with the speed it comes with heat problem, and the current packaging does not take care of this. for instance, xp941 directly connected to m.2 slot can reach more than 100c in minutes just by simple large file transfers. (the source of heat is from its controller, not nand flash. maybe this was why no thermal sensor was deployed on xp941). so, a more practical and safer packaging for these m.2 ssd's is to mount them to an pcie adapter with heatsink contacting the ssd directly. (of course if you run it as boot drive the temperature might not be as high. again, better safe than sorry)
hehe what made you think i am not there?

yah 840 pro good
(the same goes to samsung 830, sm841, sm843, sm843t, and xp941
sp941 got issues ??? speed bad for old files like 840 evo right

sweet you can go for samsung 850 pro 512gb (ronaldjoe @garage sales), for mlc chip, 150tbw, warranty wise it's 10 years, but no power loss protection. (since it's a laptop i guess it's not a big deal)

plextor m6pro and crucial m550 are decent too, but warranty is 5 years and 3 respectively. if you need power loss protection, then crucial drive is your choice. (although the plextor drive has some sort of data loss preventions due to power interruption but i am not really sure about this)

no. non-pro have tlc (840/840 evo/upcoming 850 evo). 84o pro and 850 pro have mlc.

ah those insanely high-speed product releases. i'm not sure about other samsung products, but in terms of ssd's, they are one of the best, as of now (because of their advantages in that particular industry)

it's fine that you don't like their products, because you still have plenty of choices

Benchmark is usually done few times to confirm your performance optimization, other than that, you won't need benchmarks all the time, so Write cycle of the NAND should last you decades to come with normal daily usage. Downloads and BT will be another story.

crucial mx100 is below 1k.

We've got even lower.

From Hikari85, but I think the promo ends already, still the normal price seems lower.

In a year or two hopefully sata ssd can reach a price point that is much more affordable to most people.

For the next coming wave i hope laptops that i want will have at least 1x pcie 3.0 x4 m.2 slot. (Like asus g-series g751, g771) Unlike desktops, the pcie lanes in laptop chips/cpu are limited. Hopefully that will change in near future. By the look at the current chips, if you go for gpu sli config (like aw18), the m.2 slot will very likely be pcie x2 only. (The 2x gpu have taken up 16 pcie lanes)

The best bet is still laptops with single gpu.

ok story time

technically, to get rid of bottlenecks by sata's  bandwidth limitation, pci-e is used to provide more bandwidth to ssd so that it can run much faster in a system. commercially, most people thought pci-e 2.0 x2 is good enough. (so that they can earn more money, before releasing more powerful versions, i.e. from pci-e 2.0 x2 to 2.0 x4, then 3.0 x2, finally 3.0 x4)

however, two companies thought otherwise.

the first one was samsung. instead of following the norm, they released xp941, a pci-e 2.0 x4 m.2 ssd to oem in year 2013 (that's the first pci-e consumer-centric ssd). with that move samsung was forcing everyone to change their game plans, including totally skipped pci-e x2 to be at least competitive. initially there were not much enthusiasm among these oem. until the second company reacted. a few months ago, asrock put an ultra m.2 slot (1x pci-e 3.0 x4) in their product lineup, the extreme series. back then, those were the only mobo that provides such a m.2 slot. on top of that, despite this premium feature, they sold them cheap. that move made asrock to suddenly become one of the best recognized mobo manufacturers almost everywhere, and their products were recommended and awarded in macam-macam best awards.

all the above happened in a year. see? these companies really can make a difference if they want to.

now the market is populated with compatible slots. (desktop mobo's, laptops) this year samsung did it again to complete the whole story. this time they announced sm951, the first consumer-centric pci-e 3.0 x4 nvme ssd. (sm953 is for enterprise) maybe we can get hold some of these beasty ssd sometimes next year

pcie is computer bus, m.2 is a standard for a physical component (including size, form factors) and connectors (including key type, slot) that i think replacing msata, and nvme is the specification to access ssd via pcie.

1. I believe this is the small size only SSD, as small as the size of laptop wireless card.
2. This is the full lane PCI-E SSD meant for desktop/tower chassis only, mostly enterprise and/or high-end server.

If you want the faster, definitely the 2nd, no doubt, uses Enterprise grade NAND and full lane bandwidth.
But you're bound to only tower chassis, M.2 is usually for laptop especially those very slim type which can't fit the normal SATA SSD.

small form factor storage like this are necessary, since these days everything is going slimmer, and the trend of storage is moving towards nas/cloud. (think aio desktops)

yes for current implementations m.2 and pci-e slot share the same pci-e lanes. for normal users, i think there is no need for most of us to worry about this lane sharing thing. it's sufficient for general use. for instance, i can set up my desktop to have dual-gpu sli/cfx, and run 1x pci-e ssd at the same time, with no conflicts.

ONe question:

There are a few PCIE slots in our mobo.

Graphic Card will occupy one PCIE slot.

There remain 2 more empty PCIE slots. Does it make a difference which PCIE slots we install the PCIE SSD ??

oh ok. yeah most probably you will upgrade in two years hehe

--

samsung 850 evo is coming, with new tlc nand and 5-year warranty. a tlc that can do 2k p/e (samsung said). inside one of articles they also mentioned the p/e cycles of samsung 850 pro and 845dc pro to be 6k p/e and 40k p/e. it's no wonder the price is so steep!

http://www.anandtech.com/show/8747/samsung...-850-evo-review
http://www.extremetech.com/computing/19553...-the-mainstream

TLC will be the future of large and cheap SSD, i read the article bout it somewhere.
also larger SSD has longer life span if the SSD controller and the OS is doing it right.

HDD capacity can increase as large as they want as i dont really care, you dont wanna lose 60TB of data at once do you?  

if you looked at samsung's case closely, you will find that they introduce new technology every time. with that, there will be at least 2 costs sunk into the total. one is r&d, another is manufacturing. (different processes) this will always happen when a new technology is used in production. the price will be high, until it gets stabilized with appropriate volumes in production.

controlling the whole process is an advantage mainly for technology development. lowering production costs might come later.

for now, we still have plenty of options. just wait until the technology becomes mature and harvest it at the right time. (it might be sooner than you thought )

as for hdd, it's still the cheapest option for years to come. just make sure you have redundancy, including cloud-based backups.

The current state of HDD tech seems to stalled, they only introduce larger capacity every year, there are no news about transfer rate improvement, only the SATA 6Gbps gimmick which they could never be achieved.
Also the drive with >2TB has higher failure rate, they just reduce the warranty period, there is no new tech for the hdd protection.
You want longer warranty and longer MTBF? get enterprise drive, double the price with same capacity.       

And you guys seems forget there is a thing called RAID
forget about new SATA 6Gbps SSD, they're for laptop that don't have m.2 slot or lousy AMD mobo.
get a dual cheapo SSD and RAID the hell out of it if your mobo support TRIM on RAID 0 array, or just get XP941.