Emulex 110 Guía de instalación descargar pdf (Pagina 26)

EMC Host Connecivity with Emulex Fibre Channel HBAs and CNAs in the Windows Environment

Installation and Configuration

Note adapter 5, which shows a universal adapter edge connector.

Universal adapters are compatible with both 3.3 V and 5 V PCI slots.

PCI-X (or PCI Extended) slots increase the speed with which data

travels over the bus. PCI-X slots appear identical to a 64-bit PCI slot

keyed for 3.3 V. (Refer to number 3 in Figure 3 on page 25 and

Figure 4.) PCI-X slots are backwards compatible with 3.3 V PCI

adapters and universal adapters. Inserting standard PCI adapters

into PCI-X slots will lower the bus speed as they cannot take

advantage of the improved performance.

PCI-X 2.0 is the next generation of PCI-X buses. PCI-X 2.0 increases

the bus speed again, providing more performance for adapters.

PCI-X 2.0 slots also appear identical to a 64-bit PCI slot keyed for 3.3

V. (Refer to number 3 in Figure 3 on page 25 and Figure 4.) PCI-X 2.0

is also fully backward compatible with 3.3 V PCI and PCI-X.

PCI Express (sometimes noted as PCIe) is a new bus type that uses

the existing PCI model, but implements it in a faster, serial protocol.

Because of the serial way it transmits data, the PCI Express bus slot

can be different sizes depending on the throughput it supports. PCI

Express slot speeds are expressed in "lanes" and are normally shown

as x1, x4, x8, and x16. Each type of slot is a different length (as shown

in Figure 5 on page 26) and adapter edge connectors will also be of

varying lengths depending on how many lanes they require for

throughput. Because of how PCI Express slots are keyed, an x1

adapter can be inserted in all four slot types, as the adapter will

negotiate with the slot to determine the highest mutually supported

number of lanes. However, an adapter requiring x16 lanes will not fit

into a smaller slot.

Figure 5 PCI Express slots

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 239 240

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Emulex 110 Guía de instalación Pagina 26