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pseudo TRIM?


NfiniteZERO

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On my adventures throughout the Interweb, I stumbled upon this gem over at a certain rival's forum. This info seems to good to go unshared so I'll take the 10,000 lashings for it.

 

<LINK REMOVED>

 

From what I can understand of it, doing this would be akin to a TRIM command as sent from the OS or from one of those WIPER.exe utilities. I'll fire up my laptop and run a quick test.

 

And the best part - this works with all SSDs and RAIDed SSDs too.

 

Numbers in a bit - watch this space.

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  • Corsair Employees
No that may get you banned, if its something that you see would be helpful then post links to the original content; any information from another competitors site will most likely not have anything to do with our products.
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Gotcha boss. Don't want to be agitating people's dots now. I'll run the test and let the numbers decide.

 

First, test methodology and setup:

 

ASUS G50Vt-X5 laptop w/ Corsair P256 SSD

 

Tweaks:

-Everything in Davyc's sticky

 

Tools used:

-PerfectDisk 10 Home Trial

-AS-Cleaner

 

Hypothesis:

By using PerfectDisk 10 to agressivly consolidate free space, followed by AS-Cleaner to write logical 1's to the empty space on the SSD, performance can be improved.

 

Current ATTO benchmark before testing is attached.

 

attachment.php?attachmentid=6118

before_tony_trim.PNG.c5d1fdf9d7d627946c8d50345c86f0e4.PNG

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The article talks about using PerfectDisk 10 (supposedly SSD compatible but I wasn't able to find proof of this on their website) to consolidate free space. There's a 15-day free trial of the software, but that's obviously not a permanent fix, and there's no way anyone would recommend buying software to run in the background to patch up a HW issue.

 

After the consolidation of free space they used a AS-Cleaner (free) that fills up the drive with a file that's all logical 1s (which they say is the same as erasing blocks, which is akin to TRIM), and then erases said file.

 

They said it showed speed gains, but no benchmarks so far to prove it. They recommended that this process be run once or twice a week.

 

Don't know about anyone else, but I see this as a band aid at best. However, if there was a TRUE free piece of software that could do the consolidation, it may sate the minds of some until new firmware is out.

 

 

NfiniteZERO: Can't wait to see the results.

 

NOTE: Just came across a post where someone ran ONLY the AS-Cleaner (trying to find a 3rd party source for that software) and it helped.

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The article talks about using PerfectDisk 10 (supposedly SSD compatible but I wasn't able to find proof of this on their website) to consolidate free space. There's a 15-day free trial of the software, but that's obviously not a permanent fix, and there's no way anyone would recommend buying software to run in the background to patch up a HW issue.

 

After the consolidation of free space they used a AS-Cleaner (free) that fills up the drive with a file that's all logical 1s (which they say is the same as erasing blocks, which is akin to TRIM), and then erases said file.

 

They said it showed speed gains, but no benchmarks so far to prove it. They recommended that this process be run once or twice a week.

 

Don't know about anyone else, but I see this as a band aid at best. However, if there was a TRUE free piece of software that could do the consolidation, it may sate the minds of some until new firmware is out.

 

 

NfiniteZERO: Can't wait to see the results.

 

I agree Wired - it's nothing but a band-aid but right now, that's all we can have as far as fixes with cutting edge tech like this. I'll have the results as soon as the test is done and maybe it can deafen some of the griping that people are posting on here as of late.

 

I know RAM GUY and the gang are working hard enough as it is and I'm not going to try to beat down their door with QQ about TRIM and firmware - I know better. I'll spend my time constructively to try and help where I can to solve problems, (hopefully) not create more problems.

 

If this works, I say great! If not, oh well - at least I tried, right? :D:

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Interesting!!

 

It seems a few days use makes one heck of a difference..This is kinda confusing but does not look that good!

 

http://www.the-firmclan.co.uk/picture_library/ssd1.PNG

 

1st screenie today and the below sreenie on the 9th Nov. Just a few days??

 

http://www.the-firmclan.co.uk/picture_library/ssd2.PNG

 

I must add though that that WEI scores remain exactly the same ie 7.6 for both..?

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I ran the Perfect 10 defrag and the AS free space cleaner....initially,the write speeds went down,but after a couple of restarts,they are up to 365K from 265K. Read speed is up as well but as much (375 from 355K). It seems to work,although I was pretty happy with everything before. Don't seem to have the huge performance drop offs a lot of people are complaining about..at least not so far
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Overall looks worse than the ATTO before testing.

 

[table=head]Write|Read

[table=head]Transfer Size (KB)|Before Testing|After PD/AS-C|After multiple reboots

0.5|12160|11053|7953

1.0|14760|20073|17664

2.0|25600|29474|29688

4.0|46033|45722|46407

8.0|59308|63488|61638

16.0|82462|65048|73515

32.0|89667|88158|74740

64.0|115395|108060|115970

128.0|125432|111700|124549

256.0|134217|116610|120312

512.0|137894|124853|121189

1024.0|153684|105062|133549

2048.0|168827|112316|131157

4096.0|130097|116965|121464

8192.0|153684|117477|134217

[/table]|[table=head]Transfer Size (KB)|Before Testing|After PD/AS-C|After multiple reboots

0.5|12704|13085|10315

1.0|24259|25088|25217

2.0|48518|47497|47261

4.0|84306|84693|74818

8.0|120893|121192|117428

16.0|143633|142054|139617

32.0|170905|164113|161338

64.0|176741|174637|176317

128.0|236161|227276|226725

256.0|233067|226634|226154

512.0|234441|227487|224632

1024.0|233422|222306|226050

2048.0|234441|227487|225576

4096.0|235469|226527|225576

8192.0|235469|226527|226527

[/table]

[/table]

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Hrm...Not exactly what I was looking for, but perhaps more tinkering is in order.

 

So I'm thinking there might be something going on here that might have affected test results...possibly.

 

Here's a brief history on the drive that I tested on:

-Used OEM restore disk (Windows Vista)

-Windows 7 upgrade as a clean install (saw Vista install, thus "qualifying" for the upgrade code, but just like a clean install)

-Deleted Windows.old from upgrade install

-Performed tweaks from Davyc's thread

-Installed commonly used programs (Acrobat Reader, Flash, Office, ETC)

-Installed quite a few games (3-4 were in the 16gb range, all else were 8GB or less)

 

Notice that my drive is running at ~25% free space. Perhaps this is where the hardware limitations come in and start bogging down performance? I remember reading someplace that between 25-15% free space remaining is when you take a sizable performance drop.

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The same decrease in performance occurred for me when I used the procedure as well, I don't recommend it. The only thing I have found that helps restore performance on the X-series drives is running wiper.exe (google it, I can't post the link here, but it works on the Corsair branded Indilinx drives).
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It is beta, but I think it's been in beta for about 6-8 months and will likely never change to a final version. Some people have reported data loss under x64 systems, and there is a disclaimer when you run it stating that fact. But, as stated above, I have had zero issues using it on my X128 and X64 Corsair drives. Just be sure to use IDE mode and not AHCI... it takes about a minute in IDE and most of the night in AHCI!
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Found what I was looking for.

 

Anand over at AnandTech wrote his 3 part SSD Anthology (http://www.anandtech.com/storage/showdoc.aspx?i=3631&p=1) where he tested SSDs with the 3 major controllers out on the market.

 

Seems that the Samsung controller (aka the P-series) takes the biggest performance hit after going into a "used" state. After doing the garbage collection, it did recover to ~91% of normal speed. (No GC for my drive since I don't have the GC firmware).

 

Sad part is that he doesn't say anything really about the capacity and the role it plays in performance drop, though his magic number is 20% free space.

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It is beta, but I think it's been in beta for about 6-8 months and will likely never change to a final version. Some people have reported data loss under x64 systems, and there is a disclaimer when you run it stating that fact. But, as stated above, I have had zero issues using it on my X128 and X64 Corsair drives. Just be sure to use IDE mode and not AHCI... it takes about a minute in IDE and most of the night in AHCI!

 

Hmm that's strange.

I'm using wiper in AHCI mode and the process never took longer then 30 sec.

Intel chipset drivers installed.

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