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A SCSI host adapter connects host system to boot from a SCSI device, but also facilitates configuration of the host adapter. Typically a device driver, linked to the.

Emulex Drivers for Windows Release Notes 2 P011383-01B Rev. A 2. In a boot from SAN configuration using iBFT, if the Internet Small Computer System.

NOTE : No future driver updates are planned for this operating system. The versions listed on this page are the final versions, and no additional support is available.
Emulex Standard Downloads Firmware, Boot Code, Drivers, Utilities and Documentation.

The document titled Supported Hardware List, Device Driver, Firmware and Recommended Software Levels for the IBM Storwize V7000 provides the operating.

V7.4.x Supported Hardware List, Device Driver, Firmware and Recommended Software Levels for IBM Storwize V7000.

Fibre Channel host bus adapter a 64-bit PCI-X card

SCSI host bus adapter a 16-bit ISA card

In computer hardware, a host controller, host adapter, or host bus adapter HBA connects a computer, which acts as the host system, to other network and storage devices. The terms are primarily used to refer to devices for connecting SCSI, Fibre Channel and eSATA devices. However, devices for connecting to IDE, Ethernet, FireWire, USB and other systems may also be called host adapters.

The term network interface controller NIC is more often used for devices connecting to computer networks, while the term converged network adapter can be applied when protocols such as iSCSI or Fibre Channel over Ethernet allow storage and network functionality over the same physical connection. These can include TCP offload engines.

Contents

1 SCSI

2 Fibre Channel

3 InfiniBand

4 ATA

5 SAS and SATA

5.1 eSATA

6 Mainframe I/O channels

7 See also

8 References

9 External links

SCSI edit

Main article: SCSI host adapter

A SCSI host adapter connects host system to boot from a SCSI device, but also facilitates configuration of the host adapter. Typically a device driver, linked to the operating system, controls the host adapter itself.

In a typical parallel SCSI subsystem, each device has assigned to it a unique numerical ID. As a rule, the host adapter appears as SCSI ID 7, which gives it the highest priority on the SCSI bus priority descends as the SCSI ID descends; on a 16-bit or wide bus, ID 8 has the lowest priority, a feature that maintains compatibility with the priority scheme of the 8-bit or narrow bus.

The host adapter usually assumes the role of SCSI initiator, in that it issues commands to other SCSI devices.

A computer can contain more than one host adapter, which can greatly increase the number of SCSI devices available.

Major SCSI adapter manufacturers are HP, ATTO Technology, Promise Technology, Adaptec, and LSI Corporation. LSI, Adaptec, and ATTO offer PCIe SCSI adapters which fit in Apple Mac, on Intel PCs, and low-profile motherboards which lack SCSI support due to the inclusion of SAS and/or SATA connectivity.

Fibre Channel edit

The term host bus adapter HBA is most often used to refer to a Fibre Channel interface card. Fibre Channel HBAs are available for open systems, computer architectures, and buses, including PCI and SBus obsolete today. Each HBA has a unique World Wide Name WWN, which is similar to an Ethernet MAC address in that it uses an OUI assigned by the IEEE. However, WWNs are longer 8 bytes. There are two types of WWNs on a HBA; a node WWN WWNN, which is shared by all ports on a host bus adapter, and a port WWN WWPN, which is unique to each port. There are HBA models of different speeds: 1Gbit/s, 2Gbit/s, 4Gbit/s, 8Gbit/s, 10Gbit/s, 16Gbit/s and 20Gbit/s.

The major Fibre Channel HBA manufacturers are QLogic and Emulex. As of mid-2009, these vendors shared approximately 90 of the market. 1 2 Other manufacturers include Agilent, ATTO, Brocade, and LSI Corporation.

HBA is also known to be interpreted as High Bandwidth Adapter in cases of Fibre Channel controllers.

InfiniBand edit

The term host channel adapter HCA is usually used to describe InfiniBand interface cards.

ATA edit

ATA host adapters are integrated into motherboards of most modern PCs. They are often improperly called disk controllers. The correct term for the component that allows a computer to talk to a peripheral bus is host adapter citation needed. A proper disk controller only allows a disk to talk to the same bus.

SAS and SATA edit

SAS or serial-attached SCSI is the current connectivity to replace the previous generation parallel-attached SCSI PAS devices. Ultra320 was the highest level of parallel SCSI available, but SAS has since replaced it as the highest-performing SCSI technology.

SATA is a similar technology from the aspect of connection options. HBAs can be created using a single connector to connect both SAS and SATA devices.

Major SAS/SATA adapter manufacturers are Promise Technologies, Adaptec, HP, QLogic, Areca, LSI and ATTO Technology.

eSATA edit

External Serial ATA disk enclosures and drives are increasingly common citation needed in the consumer computing market, but not all SATA-compatible motherboards and disk controllers include external SATA ports. As such, adapters to connect external SATA devices to ports on an internal SATA bus are commonly available.

Mainframe I/O channels edit

Main article: I/O channel

In the mainframe field, the terms host adapter or host bus adapter were traditionally not used. A similar goal was achieved since the 1960s with a different technique: I/O channel, or simply channel, is a separate processor that can access main memory independently, in parallel with CPU like later DMA in personal computer field, and that executes its own I/O-dedicated programs when pointed to such by the controlling CPU.

Protocols used by I/O channels to communicate with peripheral devices include ESCON and newer FICON.