TRIM and Raid

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TRIM and Raid

Postposted on Wed Dec 23, 2009 6:31 pm

Simple question, but not one I've seen addressed anywhere (even in the reviews on the site here); Does it work?

For clarification, TRIM on SSD drives in a raid array.
Bensam123
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Re: TRIM and Raid

Postposted on Sun Dec 27, 2009 6:33 pm

*bump*
Bensam123
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Re: TRIM and Raid

Postposted on Sun Dec 27, 2009 6:44 pm

No, it doesn't. I got an OCZ vertex ssd for Christmans and have been doing a lot of research lately on ssd's.

http://www.ocztechnologyforum.com/forum ... ostcount=9
http://www.ocztechnologyforum.com/forum ... ostcount=6
http://www.ocztechnologyforum.com/forum ... ostcount=4
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Kulith
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Re: TRIM and Raid

Postposted on Sun Dec 27, 2009 6:58 pm

It could work but the OS would need to pass the TRIM command to the RAID controller/driver/software which would then need to pass it along to the appropriate drives in the stripe or to both drives in a mirror. I am not aware of any RAID systems which support this yet.

Update:

After doing a little browsing I found references to Adaptec and Areca preparing to release TRIM support for their RAID products. TRIM support for RAID 0, 1, and combinations thereof is straightforward but TRIM support for parity RAID is problematical because of lack of support and undefined behaviors in the drives themselves.
dwhess
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