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Samsung 840 EVO TLC NAND still suffering from read speed slowdowns
The chaps at TechReport noticed that the Samsung 840 EVO TLC NAND is suffering from read speed slowdowns. A few months ago this created a lot of controversy, after which Samsung was fast to release a Firmware that should have fixed this.
Samsung issued a fix for an algorithmic error in the management routine that tracks the status of cells over time but ... that obviously does not work well enough.
If you look at the screenshot above you can see the performance degraded. This test unit 840 EVO SSD spent more than three months of the shelf, he results are pretty shocking: the months old data on the disk was only recoverable with an average read speed of 35.1MB/s.
After formatting the disk and loading it with new data the disk averaged 430MB/s in HD Tach, there's a abvious issue with long-term degradation of data stored in the triple-bit-per-cell memory.
There sure are lots of technology oddities this week to report.
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Krimson
Junior Member
Posts: 7
Joined: 2010-05-28
Junior Member
Posts: 7
Joined: 2010-05-28
#5002109 Posted on: 01/28/2015 11:04 AM
i begin to be pissed i bought a gtx 970 a evo 840 and 2 3tb brracuda hd few times ago and you guys report oddities on all of them.....
i begin to be pissed i bought a gtx 970 a evo 840 and 2 3tb brracuda hd few times ago and you guys report oddities on all of them.....
War child
Senior Member
Posts: 334
Joined: 2013-01-03
Senior Member
Posts: 334
Joined: 2013-01-03
#5002113 Posted on: 01/28/2015 11:06 AM
I thought Samsung released firmware last October to fix this issue?
So basically it is more than a firmware fix required. Do I detect a reason to RMA many disks then?
Either way, in order for this to be fixed they had to have known about it for a long time as SSD degradation validation isn't something you can test in a short space of time. And come up with an immediate fix.
I thought Samsung released firmware last October to fix this issue?
So basically it is more than a firmware fix required. Do I detect a reason to RMA many disks then?
Either way, in order for this to be fixed they had to have known about it for a long time as SSD degradation validation isn't something you can test in a short space of time. And come up with an immediate fix.
BadDriver
Senior Member
Posts: 293
Joined: 2013-08-15
Senior Member
Posts: 293
Joined: 2013-08-15
#5002125 Posted on: 01/28/2015 11:26 AM
Krimson you bought the devils hardware bug pack.
I use my 840 evo as the 2nd SSD d:\ with al my games on it.
Many times BF4 just stops and i get a timed out from the server, can it have someting to do with the 840 evo?
I cant find any other problem with my pc.
I use the latest firmware version: EXT0CB6Q
i begin to be pissed i bought a gtx 970 a evo 840 and 2 3tb brracuda hd few times ago and you guys report oddities on all of them.....
Krimson you bought the devils hardware bug pack.
I use my 840 evo as the 2nd SSD d:\ with al my games on it.
Many times BF4 just stops and i get a timed out from the server, can it have someting to do with the 840 evo?
I cant find any other problem with my pc.
I use the latest firmware version: EXT0CB6Q
Fyew-jit-tiv
Senior Member
Posts: 857
Joined: 2008-04-10
Senior Member
Posts: 857
Joined: 2008-04-10
#5002156 Posted on: 01/28/2015 12:37 PM
been following this for a while now. Waited for the fix and the last week I purchased 2 from amazon. Seriously thinking about returning them.
been following this for a while now. Waited for the fix and the last week I purchased 2 from amazon. Seriously thinking about returning them.
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Senior Member
Posts: 14289
Joined: 2014-07-21
Hmm still got two of those running... maybe that's what's slowing down my gaming rig's program and windows disk and lets me feel hickups from time to time recently.