LSI 9300-8i does it run 8087 @ 6GB/s? Compatibility with SAS2?

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cgtechuk

Member
Dec 27, 2016
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Hi All,

I currently have 2 x LSI 9211 Cards flashed to IT Mode and they run 3 Enclosures an SC846 (Dual Expander) an SC847 (Dual Expander) and a SC936 (4 x SFF8087 no expander)

I also inherited a few LSI 9300-8i Controllers.

What I am asking is with the SC936 Chassis it is 4 x SFF 8087 connectors and has no expander, If I get 2 x LSI 9300 Cards can i run all 4 SFF 8087 ports at 12G/Bs (SAS3) if the drives support it or does the SFF8087 onmly support 6GB/s?

I am asking as i have some nice enterprise SAS3 SSDs to be fitted and I want to know if I hook them up via SFF8643 => SFF 8087 cables what speed they will run at? Or am I as well keeping the 9211 cards and selling the new ones as the fastest I can run at is 6?

I know the SC846 and SC847 are a lost cause as they have SAS2 expanders so will only ever run at SAS2 speeds
 

whitey

Moderator
Jun 30, 2014
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Should run at 12Gbps granted your backplane is SAS3 or A-style backplane...maybe even TQ if memory serves me correct but I may be wrong there. Are you asking if host only on the SC936 if you connect some sas3 ssd's if those will run at 12Gbps, again when you say 8643 minisas-hd to 8087 minisas they are 99.999% of the time involving a backplane/expander so your limitation in there unless pass-thru type-A again or a sas3 backplane.

Ninja edit: Disclaimer I am not too familiar w/ the SC936 but if it's a JBOD I'd bet again it's all abt the backplane/interconnect.

Double ninja edit: Yep looking at this https://www.supermicro.com/manuals/chassis/3U/SC936.pdf

Page 64 of 124 here it looks like typical 8087 connectors on the SC936 JBOD unit so 12Gbps end-to end for you buddy if you use the 9300-8i's and 8643 to 8087 cables. A-style it appears to me.
 
Last edited:

K D

Well-Known Member
Dec 24, 2016
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If you have the 936 with A backplane(Four 8087 connectors) it works at 12GBps with 9300-8i.
 

cgtechuk

Member
Dec 27, 2016
73
1
8
@whitey & @K D Many thanks for the confirmation it does indeed have 4 x 8087 connectors on the Backplane with no expander on the 936 (believe it is A) Then this is great news as my 12GB/s SSDs are going to be lightening fast!