LSI SYM8953U Manual do Utilizador descarregar pdf (Página 75)

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48.583 pc

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34.5 pc

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B-3

File A named collection of information stored on a disk.

Firmware Software that is permanently stored in ROM. Therefore, it can be

accessed during boot time.

Hard Disk A disk made of metal and permanently sealed into a drive cartridge. A

hard disk can store very large amounts of information.

Host The computer system in which a SCSI host adapter is installed. It uses

the SCSI host adapter to transfer information to and from devices

attached to the SCSI bus.

Host Adapter A circuit board or integrated circuit that provides a SCSI bus connection

to the computer system.

Internal SCSI

Device

A SCSI device installed inside the computer cabinet. These devices are

connected in a continuous chain using an unshielded ribbon cable.

IRQ Interrupt Request Channel. A path through which a device can get the

immediate attention of the computer’s CPU. The PCI bus assigns an IRQ

path for each SCSI host adapter.

ISA Industry Standard Architecture. A type of computer bus used in most

PCs.Itallowsdevicestosendandreceivedataupto16bitsatatime.

Kbyte Kilobyte. A measure of computer storage equal to 1024 bytes.

Local Bus A way to connect peripherals directly to computer memory. It bypasses

the slower ISA and EISA buses. PCI is a local bus standard.

Logical Unit A subdivision, either logical or physical, of a SCSI device (actually the

place for the device on the SCSI bus). Most devices have only one logical

unit, but up to eight are allowed for each of the eight possible devices on

aSCSIbus.

LUN Logical Unit Number. An identifier, zero to seven, for a logical unit.

LVD Link Low Voltage Differential link allows greater Ultra2 SCSI device

connectability and longer SCSI cables. LVD Link lowers the amplitude of

noise reflections and allows higher transmission frequencies. Detailed

information may be found in Section 1.3.4, “LVD Link Technology”.

Mainboard A large circuit board that holds RAM, ROM, the microprocessor, custom

integrated circuits, and other components that make a computer work. It

also has expansion slots for host adapters and other expansion boards.

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LSI SYM8953U Manual do Utilizador Página 75