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Onboard Raid vs Dedicated Raid Controller

Last response: in Storage
April 25, 2010 4:36:16 PM

I am getting a couple of the ssd's to run in raid 0 and was wondering if the performance of the controller and cache will be worth the loss of TRIM support since the controller won't pass those commands.

I have a 3ware 9650E 4 port with battery backup and 256MB of cache from a previous small server build and a ASUS P6T motherboard.

a c 126 G Storage
April 25, 2010 4:38:18 PM

Onboard will be faster in IOps; many hardware RAID actually slow down SSDs due to their insane high IOps rate.

I recommend you use Intel onboard RAID if possible, and enable write caching. Do keep a backup elsewhere though of stuff you don't want to miss.
a c 126 G Storage
April 25, 2010 4:40:22 PM

Since you don't have TRIM, i also highly recommend you do not use all space on the SSD. So if you get 2x 80GB = 160GB then you can create a C: drive on that volume of 120-140GB and leave the other space UNUSED and unpartitioned.

That would cope with having no TRIM support, and is necessary to keep SSDs from degrading rapidly in RAIDs without TRIM.
April 25, 2010 5:00:30 PM