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How to TRIM in Windows 7?

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ben805

Limp Gawd
Joined
Nov 27, 2006
Messages
188
Have a 920 D0 with Asus P6T Deluxe mobo, I’m running 4x 1TB in RAID 0 on SATA II port 3, 4, 5, and 6 with the intel raid, port 1 is for DVD drive, if I connect my SSD in port 2 would the drive still have TRIM? Or do I need to get rid of the RAID rray and change to AHCI mode for the TRIM to function in win7?

I will receive my Sammy 830 256GB SSD tomorrow...
 
You don't need AHCI mode for TRIM, so as long as it's not part of the RAID array / controller you should be good to go.
 
AHCI is actually active in RAID mode for any drive that is not part of the array. With any Intel drivers from the last couple of years it should just work.
 
Does windows 7 auto-trim? Since it makes data unrecoverable, I'd think there would be a user-end confirmation. If it does, how often does it do it?
 
acewolf said:
Does windows 7 auto-trim? Since it makes data unrecoverable, I'd think there would be a user-end confirmation. If it does, how often does it do it?
Click to expand...

Milliseconds later, and it could be quite often. Why would you need user confirmation? The data could exist in pieces in 20 different places on the SSD, but in small fragments. Without TRIM, the drive wouldn't know which should be kept and which should be deleted.

If you want, you can enable trim one day a week, but you should leave it on. It greatly diminished the amount of internal housekeeping the SSD must perform. It's not occurring at the file level, but at the block and page level. Without TRIM, the spare area is all that the SSD can rely on. With TRIM, the drive gets access to a much larger pool of clean blocks, as any non-used space on the user partition can be "trimmed" and thrown into the pool essentially. Without TRIM, write amplification goes way up, reducing longevity and performance.

Depending on how you look at it, TRIM is either somewhat important or very important. Either way, it's still important. Some drives do manage much better without TRIM, but most drives tend to lean on TRIM more than internal garbage collection.
 
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does TRIM only kicked in when the drive was idling or in sleep mode? what is the command to manually activate it?
 
ben805 said:
does TRIM only kicked in when the drive was idling or in sleep mode? what is the command to manually activate it?
Click to expand...

Open command prompt and type fsutil behavior query disabledeletenotify

0=Enabled
1=Disabled

If its disabled type fsutil behavior set disabledeletenotify 0
 
TRIM kicks in when you delete some files, for example. It only takes fractions of a second. It's just marking blocks which should be cleaned on a proactive basis.
 
Trim is a command sent by the OS to the drive. It's send every time a cluster (logical) is freed up by the OS. It doesn't mean the SSD acts on it at that exact moment, it can have a todo list and wait for enough work before doing anything.
 
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