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I recently upgraded the firmware on my SSD to support TRIM and upgraded to Windows 7. How can I tell whether Windows is recognizing the drive as SSD and using TRIM correctly?

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Which SSD and firmware are you using? – Sim Nov 1 '09 at 23:16
Crucial 128GB M225 firmware version 1819 – Dan Hook Nov 2 '09 at 2:48
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4 Answers

up vote 10 down vote accepted

According to the Crucial User Forums - Is TRIM Running? to test if TRIM is enabled run "fsutil behavior query disabledeletenotify" in an administrative command window.

If it comes up as 0 then it is enabled.

Have a read of the comments of Support and Q&A for Solid-State Drives and this Intel Community Forum for more info.

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Unfortunately this might be too high-level and inconclusive. Google disabledeletenotify and you will find the same quote everywhere which says this among other things: "When the disk driver receives the command, it will either act on it or ignore it." – Bender Nov 2 '09 at 17:13
Does this really tell you if the drive is using TRIM, or does it just tell you if the OS supports TRIM? I tried this on a Windows 7 installation with no SSDs, but that command still returned 0. – Nate Jan 18 at 22:24
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up vote 6 down vote

I'm still looking for an authoritative answer, but I noticed that on my machine, automatic defragging is scheduled for all of my HDDs, but not my SSD. I think this means Windows is recognizing the disk as an SSD.

The click-by-click version of the answer:

1) Right click on a disk drive, go to properties.

2) Select the Tools tab and click on Defragment now...

3) Click on Configure schedule...

4) Click on Select disks...

5) The SSD should not show up in the list of disks if Windows recognizes it as an SSD.

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my SSD shows up there! what should I do? and why should I care..it's still fast – vsync Jul 1 '11 at 18:42
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up vote 3 down vote

Until there're better answers you can use indirect clues from the latest AnandTech article on SSDs: The SSD Improv: Intel & Indilinx get TRIM, Kingston Brings Intel Down to $115:

TRIM won't work on a RAID array.

(Other information previously here about non-MS drivers not supporting TRIM was out of date. For example, Intel added TRIM in March 2010 provided the drive is not in a RAID array: Intel RAID driver adds pass-through TRIM support )

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up vote -2 down vote

If it sees the drive and you can format it, it recognizes it and is using it correctly. All SSD "features" are handled through the SSD's firmware. Your SSD's manufacturer may have some tools to initiate TRIM on demand such as a "garbage collection" tool.

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TRIM isn't about tools and is a feature, not a "feature". It is supposed to be supported by an OS. – Bender Nov 2 '09 at 0:02
He's not entirely wrong, but this question is about Windows 7. – JL. Oct 27 '10 at 15:06
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