That report isn't exactly clear telling how often faults occurred, it more or less says sometime during testing they occurred.
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SSD Problems
- Thread starter BradHatter
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That report isn't exactly clear telling how often faults occurred, it more or less says sometime during testing they occurred.
At the bottom of that report we see:
"11th USENIX Conference on File and Storage Technologies (FAST 13) 271"
and doing a Google on that I find the dates of the conference to be Feb. 12-15, 2013. I think it's safe to assume that the report was generated using SSDs made in 2012 or earlier.
that's sort of a long time ago.
"11th USENIX Conference on File and Storage Technologies (FAST 13) 271"
and doing a Google on that I find the dates of the conference to be Feb. 12-15, 2013. I think it's safe to assume that the report was generated using SSDs made in 2012 or earlier.
that's sort of a long time ago.
Do you know of any that disavow that report? Any that say "This old problem doesn't happen anymore?"
Take a quick look at this one:
http://www.enterprisestorageforum.c...sd-vs.-hdd-performance-and-reliability-2.html
That's from last October so it's pretty new. If you read it they list several things that can go wrong with an SSD, and the power surge problem is still listed among them, along with others I never even heard of.
http://www.enterprisestorageforum.c...sd-vs.-hdd-performance-and-reliability-2.html
That's from last October so it's pretty new. If you read it they list several things that can go wrong with an SSD, and the power surge problem is still listed among them, along with others I never even heard of.
Pretty much all storage media, and pretty much all electronic components can be affected by power surge/outage, that is specific to SSD, a write to a normal HDD can get messed up in the same way. Both kinds of drive contain capacitance to try and mitigate but there are still going to be units and circumstances that have issues.
It likely doesn't, what gets corrupted is probably something more critical, similar to losing the FAT table, the data is still there but the system can't tell where it is. Writing zeros all over an SSD takes time, it can't be done in an instant so if it happens with a power failure I'd theorise it is something in the SSD controller structure that is corrupted.
I've not seen any reports as to whether file search software can find the data files after such a hit though to support or blow that theory.
Moot TBH unless the manufacturer comes up with some tools to deal with it, if it can be dealt with after the fact. Best to just cover it with a good backup regime to cover the loss of the data from whatever cause.
Is there any free or cheap program for SSD reconditioning without Windows?
My Samsung 840 Evo has only 135 & 106MB/s read/write speed at the moment even after a successful Samsung's own performance restoration update. I have used a Trim Enabler right from the beginning. The SSD is about two years old.
My Samsung 840 Evo has only 135 & 106MB/s read/write speed at the moment even after a successful Samsung's own performance restoration update. I have used a Trim Enabler right from the beginning. The SSD is about two years old.
Hold command-s when booting to get to single user mode. Then at the command prompt enter "fsck -fy" (without the quotes). That will TRIM all unused blocks on the drive and should restore performance. Type reboot after.
It won't work on the 840 Evo (which that user has). TRIM alone can't help.
What he has to do is to apply the 840 Evo performance restoration firmware update. And even that is a hit and miss.
He mentioned he had already applied that, so I figured it was worth a shot.
Hmm. In that case, this appears that the algorithms of the MEX controller of the 840 Evo seems to have screwed up big time and not respond to the firmware update.
On a side note, the 850 Evo uses the MGX controller, but the 850 Pro still uses the MEX controller. I really hope this screwup won't affect the 850 Pro as well.
I think I've read about this problem before.
http://www.extremetech.com/computin...d-performance-issues-being-prepped-by-samsung
The following Google search yields tons of info, FWIW:
Samsung SSD performanec problems
I'm under the impression the media is wiped, if even usable. It sounds to me like some of the units were not re-usable after the problem. Either I missed it or the details in the report are lacking in clarity.
He mentioned he had already applied that, so I figured it was worth a shot.
Might need the second generation version of the fix for the Samsung 840 EVO which came out just a short time ago.
http://anandtech.com/show/9196/samsung-releases-second-840-evo-fix
What I'd like to know is whether or not a Mac will indicate to a user that the SSD is about to go because its memory cells are starting to die off. There was a post on here some time ago where a user had to have his SSD replaced because of that but he had to take it to the Apple store to find out.
To me this implies the Mac's don't necessarily let anyone know an SSD is about to become toast.
Anyone know if this is correct or not?
To me this implies the Mac's don't necessarily let anyone know an SSD is about to become toast.
Anyone know if this is correct or not?