http://www.anandtech.com/show/8550/samsung-acknowledges-the-ssd-840-evo-read-performance-bug-fix-is-on-the-way Anandtech already reported this Hope they fix the issue soon.
Atleast it is not as bad as the old firmware bugs that were in the early editions of the Crucial M4's.
I was under the impression that defragging an SSD opened up an enormous black hole that would end the universe and create another Big Bang.
No it doesn't, its fine. SSD of today, are very durable. Due you don't want to defrag TLC base nand SSD on a daily basis, but they can take large amount of writing. The reality of thing however, is that defraging an SSD, normally, results in no performance increase. As the SSD doesn't have seek time in collecting every peace of data that form 1 file. It gets everything together, and on purpose fragments the data for fast access. However, in this case, it seams you need to move data inside to keep the speed up.
Copying away and back is a better solution than defragging. Also please not this doesn't affect 840 Pro, only 840 and 840 EVO.
Firmware fix due 15th October clicky. It's not clear on what it is, nor whether it's for all 840s or just the EVOs though.
And this is why I swapped out for Intel. Samsung were sitting on this, big thread reporting probe all over the place, it took anandtech to blow apart the myth that Samsung are the best because they are fully integrated vertically etc etc so no need to worry... Look forward to the wash-up here. The fact the pro was unaffected which uses proper toggle nand drives me to my own conclusions here though... You get what you pay for.
Looks like Samsung have released a fix. http://techreport.com/review/27212/samsung-840-evo-update-fixes-slow-reads-with-old-data
Cheers Corky although us non-evos are either waiting or left in the lurch. I'll have to check to see if I'm affected yet though I guess.
Anyone know if this includes the 840 Pro? I hope not or we're going to have a very few busy few days at work.
840 EVO affected.(unknown if all old fw versions or not though) 840 affected but less severe. 840 PRO not affected.
This issue has been patched afaik. http://techreport.com/review/27212/samsung-840-evo-update-fixes-slow-reads-with-old-data Tool is here http://www.samsung.com/global/business/semiconductor/samsungssd/downloads/Samsung_SSD840EVO_Performance_Restoration.zip Guide http://www.samsung.com/global/business/semiconductor/samsungssd/downloads/Samsung_Performance_Restoration_v10_Installation_guide.pdf
