| Fast SCSI | A standard for SCSI data transfers. It allows a transfer rate of up to |
| 10 Mbytes/s over an |
| SCSI bus. |
| FCC | Federal Communications Commission. |
| 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 | A SCSI device installed inside the computer cabinet. These devices are |
Device | 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. It allows devices to send and receive data up to |
| 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 a SCSI bus. |
| LUN | Logical Unit Number. An identifier, zero to seven, for a logical unit. |
Glossary of Terms and Abbreviations |