SGPIO
SGPIO (Serial General-Purpose Input/Output) is a 4-signal (or 4-wire) bus used between a Host Bus Adapter (HBA) and a backplane. Out of the 4 signals, 3 are driven by the HBA and 1 is driven by the backplane. Typically, the HBA is a storage controller located inside a server, desktop, rack or workstation computer that interfaces with Hard Disk Drives (HDDs) to store and retrieve data.
The MG9082 supports 2 SGPIO channels. Multiple instances of the MG9082 can be cascaded so that drives on the same logical SGPIO-bus can be spanned across physical backplanes. This is especially useful in blade servers and high configurability systems, where a single backplane with few drives can be combined into larger storage arrays.
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