Intel 12Gb/s, User Manual

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12Gb/s Intel® RAID Controllers User Guide 9
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They permit multiple initiators to address a single target (in a fail-over
configuration) through an expander.
PCI Express Performance
The following list describes the PCIe performance features of the RAID controllers:
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They provide a PCIe interface that does the following:
— Supports a dedicated PCIe bus.
— Supports x8 lane configuration.
— Supports transfer rates of up to 8GT/s per lane.
— Complies with the PCI Express specification, Revision 3.0 , and the Serial ATA
specification, version 3.0 .
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They provide unequaled performance through the Fusion-MPT architecture.
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They provide high throughput and low CPU utilization to offload the host
processor.
Usability Features
The following list describes the usability features of the RAID controllers:
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They simplify cabling with point-to-point, serial architecture.
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They support smaller, thinner cables that do not restrict airflow.
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They provide drive spin-up sequencing control.
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They provide one LED signal for each PHY to indicate link activity (this is a fault
LED only for controllers with internal port connectors).
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They provide an I
2
C interface for enclosure management.
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They support the internal SAS Sideband signal SFF-8485 (SGPIO) interface.
Flexibility Features
These features increase the flexibility of the RAID controllers:
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They support a Flash ROM interface, a nonvolatile static RAM (NVSRAM)
interface, and a pipelined synchronous burst SRAM (PSBRAM) interface.
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They offer a flexible programming interface to tune I/O performance.
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They permit mixed connections to SAS targets or SATA III targets.
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They leverage compatible connectors for SAS connections and SATA III
connections.
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They permit grouping of up to four PHYs in a single quad port to form a wide port.
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They permit programming of the World Wide Name.