TRIM check tool

[CyberShadow]

I wrote a tool that (hopefully) will allow to easily determine if TRIM is really working on an SSD / RAID.

It uses the same basic idea as here: http://www.anandtech.com/show/6477/trim-raid0-ssd-arrays-work-with-intel-6series-motherboards-too/2

This is different from using "fsutil" as fsutil can only display if the OS is configured to send TRIM commands, and not whether they actually do anything (or if they work on a RAID).

Let me know how it works for you. 🙂

Source, download

 

[Elixer]

Interesting. Was all set to check out the source and compile it, when I noticed you used D... hmm

 

[John Connor]

Verify TRIM is enabled on your SSD
A) Click start and type in cmd and hit the enter key
B) Type in fsutil behavior query disabledeletenotify
- DisableDeleteNotify = 1 (Windows TRIM commands are disabled)
- DisableDeleteNotify = 0 (Windows TRIM commands are enabled)

 

[John Connor]

I get a 0, but your program says something like do what needs to be done to activate TRIM. 😕

 

[choliscott]

I believe it's supposed to do the Hex editor trick to see if Trim is actually working & not just the fsutil command

I get a 0, but your program says something like do what needs to be done to activate TRIM. 😕

 

[John Connor]

This is what I get.

fsutil command says TRIM is on, but this program apparently says TRIM is off. So what is the case?

 

[Brahmzy]

All we need now is a nice GUI! This tool would rock if it truly checks out.

 

[choliscott]

Wait a couple of minutes after running it, as I got the same message, but a few minutes later I re-ran it & it shows that the sector was overwritten.

This is what I get.

fsutil command says TRIM is on, but this program apparently says TRIM is off. So what is the case?

 

[taltamir]

Verify TRIM is enabled on your SSD
A) Click start and type in cmd and hit the enter key
B) Type in fsutil behavior query disabledeletenotify
- DisableDeleteNotify = 1 (Windows TRIM commands are disabled)
- DisableDeleteNotify = 0 (Windows TRIM commands are enabled)

except this does not verify trim is enabled on your SSD.

It checks if windows is generating trim commands at the FS level. The only possible way for it to not be is if you manually turned it off for debug purposes.
Even if you have nothing but HDDs in the system fsutil will still display 0. Even if you have an SSD that is NOT trim compatible fsutil will still display 0.

The fsutil method is thus worthless.

 

[murphyc]

Recent SSD's are essentially COW, and figure out when you overwrite a file what blocks are to be removed from use. It doesn't need TRIM.

And exception to this might be OS level full disk encryption, which converts the whole drive by rewriting all sectors (e.g. OS X). In that case as every sector is read and encrypted, it seems to me that the SSD will see every sector as being allocated. So it won't have a large supply of reserve zero'd blocks ready to go.