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[OCZ/Intel] Intel: No TRIM for RAID

post #1 of 53
Thread Starter 
http://techreport.com/discussions.x/18653

http://www.ocztechnologyforum.com/fo...tion(-)/page12

Quote:
The latest: Intel® RST 9.6 will be released this week which includes TRIM support for SSDs. It will support TRIM with SSDs in an AHCI configuration, or with the RAID controller enabled and the SSD is used as a pass through device. An example of this use case is for users that want to use the SSD as a boot drive but still be able to RAID multiple HDDs together to allow for large protect data storage – a great use for the home theater PC. TRIM support for SSDs in a RAID configuration is under investigation and is not included in Intel® RST 9.6.
Translation: if your Intel storage controller is set to RAID mode, you'll now be able to benefit from your solid-state drive's TRIM functionality when running it alongside a RAID array comprised of mechanical drives. TRIM isn't supported for SSDs participating in a RAID array, however. Intel may add that feature in the future, but it hasn't committed to doing so.

Thanks Pings and DannyM for making me researching it further.

To summarize (assuming that your SSD is TRIM-Capable):
SSD + ACHI Mode + Windows 7 Driver = TRIM
SSD + ACHI Mode + Intel Driver = TRIM
SSD + ACHI Mode + NVIDIA/AMD/VIA Driver = No TRIM
SSD + RAID Mode + Non-Intel Driver = No TRIM
SSD + RAID Mode + Intel Driver = TRIM
SSD RAID = No TRIM


This driver update is really important only if you have individual SSDs and RAID of HDDs.
Edited by DuckieHo - 3/25/10 at 7:10am
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post #2 of 53
Is the other thread going to be locked?
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post #3 of 53
Damn. The bubble of before has now been shattered
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post #4 of 53
Quote:
Originally Posted by MrDeodorant View Post
Is the other thread going to be locked?
That would be best.
EDIT: Thanks Duckie.
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post #5 of 53
Duckie I had a lot of other info in that thread. You killed why?
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post #6 of 53
Thread Starter 
Quote:
Originally Posted by DrFPS View Post
Duckie I had a lot of other info in that thread. You killed why?

I didn't kill it.... another mod must have....

And all the info in the other thread was basically wrong.
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post #7 of 53
Than nothing special for now, when they release TRIM support when SSDs are in RAID that would be awesome!

Anyway on question, I am running my SSD in IDE mode and I have Win7 and 1.5 Firmware is my TRIM working or I need to switch to ACHI mode to get TRIM working?
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post #8 of 53
Quote:
Originally Posted by DuckieHo View Post
I didn't kill it.... another mod must have....

And all the info in the other thread was basically wrong.
This still doesn't explain the performance gains? I have yet to see a creditable source?

benko I had all the commands for enabling trim in win 7 in the other thread sorry.
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post #9 of 53
Quote:
Originally Posted by DrFPS View Post
This still doesn't explain the performance gains? I have yet to see a creditable source?

benko I had all the commands for enabling trim in win 7 in the other thread sorry.
Well the question is does this commands work in IDE mode?

I think TRIM is working but I don't know how to check it...
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post #10 of 53
Thread Starter 
Quote:
Originally Posted by DrFPS View Post
This still doesn't explain the performance gains? I have yet to see a creditable source?

benko I had all the commands for enabling trim in win 7 in the other thread sorry.

Intel, OCZ, and Anand Lal Shimpi aren't creditable sources?

Intel wrote the drivers.
OCZ is the most active supporter of SSDs.
Anand is one of the most informed on SSDs.


You don't need to enable TRIM for Windows 7. If the OS detects a disk with a rotational speed of 0, it enables TRIM. However, it does NOT mean the TRIM command is being passed to the SSD. The ONLY way to truely test if TRIM is working is actually benchmarking.


Quote:
Originally Posted by benko View Post
I think TRIM is working but I don't know how to check it...
Write a large file to the SSD (i.e. 10GB BluRay movie) and then delete it. Watch your HDD Activity light. After a few minutes, it should come on as the SSD cleans the sectors. That's the quick way.

The long way would be to fill up your SSD with files and delete them all. Then run a write benchmark. Then wait. The run the same benchmark again.
Edited by DuckieHo - 3/25/10 at 7:50am
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