Re: Supermicro SAS controller
On 5/1/2012 12:37 PM, Ramon Hofer wrote:
> I have the RPC-4220 case with 20 howswap slots.
You should have mentioned this sooner, as there is a better solution
than buying 3 of the 9211-8i, which is $239*3= $717. And you end up
with one SFF8087 port wasted.
Instead, get a 24 port Intel 6Gb SAS expander:
http://www.provantage.com/intel-res2sv240~7ITSP0V8.htm
$238.24
and the LSI 9240-4i, same LSISAS2008 chip as the 9211-8i:
http://www.newegg.com/Product/Product.aspx?Item=N82E16816118129
$189.99
Total: $429
W/4 extra SFF8087 cables (assuming you already have 2):
http://www.newegg.com/Product/Product.aspx?Item=N82E16816116093
$60
Total: $489
This solution connects all 20 drives on all 5 backplanes to the HBA, and
will give you ~1.5GB/s read throughput with 20 7.2k RPM drives using md
RAID 5/6, and ~800MB/s with hardware or md RAID10.
You connect the SFF8087 of the LSI card to port 0 of the SAS exapander.
You then connect the remaining 5 ports to the 5 SFF8087 ports on the 5
backplanes.
--
Stan
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