On Fri, Oct 23, 2009 at 3:48 PM, Bruno Sousa <bso...@epinfante.com> wrote:
> Could Sun'x x4540 Thumper reason to have 6 LSI's some sort of "hidden" > problems found by Sun where the HBA resets, and due to market time pressure > the "quick and dirty" solution was to spread the load over multiple HBA's > instead of software fix? > > Just my 2 cents.. > > > Bruno > > What else were you expecting them to do? According to LSI's website, the 1068e in an x8 configuration is an 8-port card. http://www.lsi.com/DistributionSystem/AssetDocument/files/docs/marketing_docs/storage_stand_prod/SCG_LSISAS1068E_PB_040407.pdf While they could've used expanders, that just creates one more component that can fail/have issues. Looking at the diagram, they've taken the absolute shortest I/O path possible, which is what I would hope to see/expect. http://www.sun.com/servers/x64/x4540/server_architecture.pdf One drive per channel, 6 channels total. I also wouldn't be surprised to find out that they found this the optimal configuration from a performance/throughput/IOPS perspective as well. Can't seem to find those numbers published by LSI. --Tim
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