ssd trim in ubuntu?

[hemlok]

Hi, I've been using ubuntu netbook remix 9.04 for a little while(I'm still a novice) on my 1810t with no problem but I just bought a intel X-25 V and I'm wondering if I got my trim working right (i'm not 100% sure what it does except boost performance)

I'm sorry if there is a thread that covered the subject I scrolled quickly in the search tab and couldn't find one.

I did some research and I think it only work on ext4 file system and I'm not sure if it's supported on 9.04 so i upgraded to a 9.10 netbook remix (wich caused me more trouble on the ui side then 9.04)

I found some help via google and installed hdparm-9.27 and got a hold of a wiper-2.5 file that support intel ssd.

I then run sudo ./wiper.sh --commit /
in my hdparm folder and I get this

Does this seem like working trim? If so how often should I run this (my guess is its automatic in w7) and what is a good way to test hd performance in ubuntu so I know if it actually works?

Thanks alot for any help I can get

[Pitabred]

http://lwn.net/Articles/353411/

That article might shed some light on things Google for Linux trim instead of Ubuntu... it's more a function of the kernel than anything.

[DEagleson]

I dont know for certain if Ubuntu 9.04 supports ssd trim, but maybe Ubuntu 10.04 LTS will since its based on a newer kernel.

[jasperjones]

I'm fairy sure 9.04 doesn't support ATA Trim. Neither does 9.10.

Linux has full Trim support only since 2.6.32. (According to Wikipedia, Trim was prepared in 2.6.28 but not fully implemented.)

Since 10.04 LTS will use 2.6.32, it should support Trim (it seems some of the necessary changes on the file system side have already been implemented with Karmic).

[jasperjones]

Just a quick update on this: while 2.6.32 supports the ATA TRIM command, it only does so for the btrfs file system. The 2.6.33 kernel released today now also supports it on ext4, nowadays the default file system in many distros.

However, in the standard config, support for TRIM is not activated. Let's hope our favorite distros will enable it nevertheless during the upcoming release cycle.

[ALLurGroceries]

I'm not sure it was in any flavor of 2.6.32, but it's surely in vanilla 2.6.33. This patch came 1 day after .32 was released:
http://git.kernel.org/?p=linux/kerne...84f55ca330a80c

[Ayle]

Well it's not like the OP can't compile it's own kernel right? Unless they have changed the procedure, I'll I had to do was download a tarball, select whatever options I wanted to have on the kernel when creating the makefile, launch the build and go outside while the computer was crunching numbers... It is fairly straightforward.

[jasperjones]

^^^ agreed, if OP doesn't mind grabbing a 2.6.33 vanilla and compiling it, there should be no problem.

i'd be interested to hear if somebody knows more. all i figured is that trim must still be somewhat experimental since it's deactivated by default.

[mr_raider]

Is the TRIM tool restricted to Intel SSDs?

[ALLurGroceries]

No, TRIM is a (mostly) standard ATA command, so any drive that implements it (some need firmware updates, etc) should work given a filesystem (and kernel) that supports it.