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rusdi
American V
Premium,MVM
join:2001-04-28
Flippin, AR
kudos:2
reply to trparky

Re: Buggy Intel SSD 520 Series SSD Firmware

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said by trparky:

I thought that TRIM was supposed to be done even if Windows does it itself. I know that Windows performs a TRIM when you delete files but what about when you overwrite a file?

Microsoft hasn't exactly been very forthcoming with their policy on the TRIM command that's built into the OS. When does a TRIM happen?

It "should" be.

Here's a way to check if it's enabled.

Open a command prompt, (Administrative level).

Command prompt > fsutil behavior query disabledeletenotify

DisableDeleteNotify = 1 (Windows TRIM commands are disabled)
DisableDeleteNotify = 0 (Windows TRIM commands are enabled)


trparky
Apple... YUM
Premium,MVM
join:2000-05-24
Cleveland, OH
kudos:2

I know about that, but appears that that may indicate that a TRIM only happens when you delete files. What about an overwrite of a file?



rusdi
American V
Premium,MVM
join:2001-04-28
Flippin, AR
kudos:2

said by trparky:

I know about that, but appears that that may indicate that a TRIM only happens when you delete files. What about an overwrite of a file?

Overwrite doesn't happen with NAND flash. it must be deleted and written in other blocks...

Here's a nice article that might help explain the difference between TRIM, and Garbage collection.
»thessdreview.com/daily-news/late···-primer/


DarkLogix
Texan and Proud
Premium
join:2008-10-23
Baytown, TX
kudos:3

1 recommendation

reply to trparky

said by trparky:

I know about that, but appears that that may indicate that a TRIM only happens when you delete files. What about an overwrite of a file?

Due to wear leveling you don't ever overwrite

overwriting nand is very slow and time consuming so instead it writes to a new location and marks the old for GC to clean up
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