Intel SASWT4I SAS/SATA Controller Question

Posted by Joe Hopfgartner on Server Fault See other posts from Server Fault or by Joe Hopfgartner
Published on 2011-02-27T14:24:48Z Indexed on 2011/02/27 15:26 UTC
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storage

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sata

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sas

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controller

Hey there!

I want to assemble a cheap storage sytem based on the Norco RPC-4020 Case.

When searching for controllers I found this one:

Intel® RAID Controller SASWT4I

This is a quote form the Spec Sheet:

Scalability. Supports up to 122 physical devices in SAS mode which is ideal for employing JBODs (Just a Bunch Of Disks) or up to 14 devices in RAID 0, 1, 1E/10E mode through direct connect device attachment or through expander backplane support.

Does that mean I can attatch 14 SATA drives directly to the controller using SFF-8087 - 4x SATA breakout cables?

That would be nice because then I can choose a mainboard that has 6 Onboard SATA and i can connect all 20 bays while only spending 155$ on the controller and like another 100$ on cables.

Would that work? And why is it 14 and not 16 when there are 4 Ports?

I am really confused about all the breakout/fanout/(edge-)expanding/multiplying/channel stuff...

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