Personal computing discussed

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by Glaring_Mistake
Tue Mar 17, 2020 10:42 am
Forum: Storage
Topic: Samsung 840 & 840 EVO Bug
Replies: 323
Views: 79269

Re: Samsung 840 & 840 EVO Bug

Hi, I still have an 840 with the old firmware and Samsung Magician 6.0.0 doesn't offer any updates for it anymore. Does anyone still have the new firmware and can provide me with the DXT0AB0Q.enc file, please? Don't know if it's all that necessary to update to the latest firmware version. The new f...
by Glaring_Mistake
Fri Aug 12, 2016 4:40 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

meerkt wrote:
I'm not sure you can assume there's a linear relation?


Based that estimation on this: http://nepp.nasa.gov/workshops/etw2015/ ... W-2015.pdf
by Glaring_Mistake
Fri Aug 12, 2016 11:19 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

You're right. SSDs in the freezer are a good idea. JEDEC specs say that client SSDs should have a data retention of one year if it the data was written to it at a temperature of 40 degrees and it was then unpowered with a temperature of 30 degrees. And this is of course when the drive has depleted ...
by Glaring_Mistake
Thu Aug 11, 2016 9:10 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

SSDs are not supposed to be left unpowered. Most manufacturers will not guarantee data integrity on an unpowered drive past a year. Are you talking about the JEDEC specs for data retention? If so they guarantee data retention that is much shorter and much longer than a year depending on the tempera...
by Glaring_Mistake
Thu Aug 11, 2016 9:03 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

If the OS is reinstalled or even from a full image restore then the performance would go back up? Since mention of power down then a system used daily will not have this slow down? Yes, new files have normal read speeds. If it is used daily it would most likely not reach these low levels, since lea...
by Glaring_Mistake
Wed Aug 10, 2016 4:23 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Not sure I'd be confident in the Sandisk SSD Plus though, given I can't find as much info on the controller or NAND (some Silicon Motion controller?). The SanDisk SSD Plus used to use their 19nm MLC NAND in combination with the DRAMless controller SM2246XT and then they changed it to 15nm TLC NAND ...
by Glaring_Mistake
Tue Aug 09, 2016 4:14 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

I don't know where you get that idea from. The Samsung 840 series was a disaster and there's little reason to think what you're seeing on that BX200 doesn't happen to other drives. Think I kind of misphrased that sentence, it would have been better to say something like: While TLC at such litograph...
by Glaring_Mistake
Tue Aug 09, 2016 1:56 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

I think it's known that most of the TLC, especially the 16nm planar stuff, is susceptible to voltage drift. The controllers are literally voltage-drift and error management boxes. I'm not suggesting that you stop testing, but if your goal is to prove that there is voltage drift you have achieved th...
by Glaring_Mistake
Mon Aug 08, 2016 9:21 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Yeah, at the moment it sounds like a torture test of sorts, rather than a real-world usage test, because the drive is not powered on long enough to let it run maintenance. It's akin to benchmarking Windows whilst windows is constantly patching and updating in the background because it's never given...
by Glaring_Mistake
Mon Aug 08, 2016 9:21 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Have not posted any screenshots of it here but it does rewrite (some) files which more than suggests that the slowdown is due to voltage drift rather than that it hasn't been able to keep up it's general maintenance. I don't understand how it suggests that. Shouldn't the background maintenance be r...
by Glaring_Mistake
Mon Aug 08, 2016 7:59 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Have not posted any screenshots of it here but it does rewrite (some) files which more than suggests that the slowdown is due to voltage drift rather than that it hasn't been able to keep up it's general maintenance.

Going to test how well it is going to recover however relatively soon.
by Glaring_Mistake
Mon Aug 08, 2016 7:22 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

I know this update is pretty late but here it is:
Image

It is not too exciting however since it is just a slight drop of 20MB/s since the last test.
by Glaring_Mistake
Tue Jun 21, 2016 12:28 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Just a bit late to update compared to the last time.

Results of last test:

Image

Read speeds continue to drop but haven't changed that much compared to last time.
by Glaring_Mistake
Fri Jun 03, 2016 1:20 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

I mean how much time between turning it on until running the test. I assume drives might do some sort of idle-time background rewriting to refresh cells. If there's no time for that, the test results might be more indicative of the real retention deterioration. Ok, I run the test right after I have...
by Glaring_Mistake
Fri Jun 03, 2016 1:17 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Methinks Micron's TLC could use some TLC. It does look like they plan to move almost completely to 3D NAND and the larger litography should mean it will not have the issue with read speeds that their current 2D 16nm TLC NAND has. So at least they don't intend to sell a lot of BX200s or of the NAND ...
by Glaring_Mistake
Fri Jun 03, 2016 8:53 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

The drive is left unpowered between tests so it doesn’t have a lot of ”on time”.
by Glaring_Mistake
Thu Jun 02, 2016 4:08 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Posting a bit late once again but here you can see the results from the latest test.

Image

So, read speeds are once again decreasing.
by Glaring_Mistake
Thu May 19, 2016 5:11 am
Forum: Storage
Topic: Corsair Force LE - Sandforce/Phison
Replies: 20
Views: 5721

Re: Corsair Force LE - Sandforce/Phison

I just bought a mainstream SanDisk ssd (x400, 512GB) and already regret it. Apparently, SanDisk has still not been able to fix their "I'd rather shut the system down than recover from sleep mode" issues on their Sandforce controllers. Their support gent recommended a registry patch (which...
by Glaring_Mistake
Thu May 05, 2016 1:38 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Update may be a bit late this time but here you can see the results from the the latest test. http://u.cubeupload.com/Glaring_Mistake/20160422173417Result.png I’ll have to say that it is an impressive result seeing as the average read speeds are higher than last time despite it being unpowered for f...
by Glaring_Mistake
Thu Apr 21, 2016 12:06 pm
Forum: Storage
Topic: Corsair Force LE - Sandforce/Phison
Replies: 20
Views: 5721

Re: Corsair Force LE - Sandforce/Phison

How about the new Intel 540s series?[/quote]

Think that it would perform pretty similar to an ADATA SP550 seeing as it uses the same NAND and controller.
by Glaring_Mistake
Tue Apr 12, 2016 6:41 pm
Forum: Storage
Topic: Corsair Force LE - Sandforce/Phison
Replies: 20
Views: 5721

Re: Corsair Force LE - Sandforce/Phison

Just want to make it clear that Corsair Force LE uses TLC NAND, don't know which brand or which litography but you have to consider the posibility that it will suffer from read speed slowdowns just like the 840/840 EVO do/did. Otherwise in terms of general performance it is definitely not among the ...
by Glaring_Mistake
Fri Mar 25, 2016 2:03 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Did not run TRIM this time since I did not find an option for it in Crucial Storage Executive, though I think we have established that it is most likely not in stead state. Nonetheless here you can see the latest results with SSDReadSpeedTester. http://i.cubeupload.com/PNt7vk.png Let me know if you ...
by Glaring_Mistake
Fri Mar 25, 2016 2:03 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

When people I know archived CD's 15 years ago, they bought the most premium Gold CD-R's they could find. I'm not sure where your "cheap SSD archive" research is headed, but it's not where I would spend my time. Have at it, though. This is not how SSD's are designed to work. Yes, and he's ...
by Glaring_Mistake
Thu Mar 24, 2016 9:45 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

2) It's because the drives are not powered up for any length of time - try leaving the drive in the system powered but idle for the next week (unless that negates your research plans). 3) I also love Crucial drives, especially since they released ssd software last year (which is excellent). The fac...
by Glaring_Mistake
Wed Mar 23, 2016 5:47 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

I love crucial drives so that's why I feel like I need t post here ^^ I have been rocking 2 crucial ssd's now. The MX100's. I have two of them. A 256 for my OS and a 512 for my steam games. I love these drives. Had em for over a year now and not a single problem. They still read just as fast as whe...
by Glaring_Mistake
Wed Mar 23, 2016 5:11 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

I see what you're getting at now. That thought had crossed my mind, but you didn't mention length of time between writing the data and testing. The Samsung TLC bug needed some time to let the cells discharge. Simply writing the drive full and testing right away didn't show degraded performance. FWI...
by Glaring_Mistake
Wed Mar 23, 2016 4:07 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

It looks like its pretty much the same story with the BX200, SP550, and Trion 100 from what I saw. I'm picking up an Arc 100 instead for my laptop at about the same cost. Have you seen any read speed issues with any of those besides in my posts? If so I would be interested in seeing them, especiall...
by Glaring_Mistake
Wed Mar 23, 2016 4:05 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

You're right, TRIM traditionally affects/improves write speeds. Read speeds generally don't degrade. ( example ) However, it seems oddly convenient that only the blocks that have been written to are affected for reads in the above tests. That's the reason I suggested running TRIM manually (to ensur...
by Glaring_Mistake
Tue Mar 22, 2016 5:11 pm
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

This just looks like the progression to steady-state performance to me. The performance drop happens in the same range as the amount of data that's currently on the drive. TRIM should recover most of that lost performance though (not all, you'd have to secure erase the drive to get back to "ou...
by Glaring_Mistake
Tue Mar 22, 2016 10:06 am
Forum: Storage
Topic: Preliminary results for Crucial BX200 degraded read speeds
Replies: 72
Views: 11370

Re: Preliminary results for Crucial BX200 degraded read spee

Interesting. Out of curiosity do your testing methods include using TRIM and waiting a few minutes for steady-state? TRIM is always active, but is not forced before testing. Nor do I test it in steady-state. I start the read test after the OS has booted up properly in order to prevent the (pretty u...
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