Is there Linux support for TRIM on SSD drives?

Does any know if there is a way to enable TRIM support on Linux for SSDs? This is included with Windows 7, and I was surprised that I couldn't find much information about it under Linux.

Info on SSD and TRIM can be found here - http://www.anandtech.com/storage/showdoc.aspx?i=3531&p=10

Solution 1:

Notice that you probably need a more recent kernel than 2.6.28, see here (based on 2.6.30-rc4 with last activity in May this year). I do not know to what degree that tree has been merged, maybe you can search the [email protected] mailing list. Update: see for instance this thread (also discussed on the kernel list).

For using TRIM you are probably interested in hdparm-9.20, released a few days ago (and I see there is even a newer wiper-1.7 release).

Update: See also this LWN article about the relationship between filesystem, TRIM, performance and SSD disks.

Solution 2:

Linux supported the TRIM command in 2.6.28, released on December 25, 2008. See here for details.

Solution 3:

I think Linux already supports Trim. Its just no SSD has support for it yet. The firmware upgrade is required for current generation OCZ and Intel drives for Trim to be enabled.

Solution 4:

For ext4 you have to add the discard option in your fstab to enable ATA Trim.

Solution 5:

Initial support added in 2.6.28, 2.6.33 has "full" trim support... whatever that means.