Domain | Domain Validation is a software procedure in which a host queries a |
Validation | device to determine its ability to communicate at the negotiated Ultra160 |
| data rate. |
Double | In Double Transition (DT) Clocking, data is sampled on both the asserting |
Transition | and deasserting edge of the REQ/ACK signal. DT clocking may only be |
Clocking | implemented on an LVD SCSI bus. |
EEPROM | Electronically Erasable Programmable Read Only Memory. A memory |
| chip typically used to store configuration information. See NVRAM. |
External SCSI | A SCSI device installed outside the computer cabinet. These devices are |
Device | connected in a continuous chain using specific types of shielded cables. |
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. |
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. |
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. |
Main Memory | The part of a computer’s memory which is directly accessible by the CPU |
| (usually synonymous with RAM). |
NVRAM | NonVolatile Random Access Memory. Actually an EEPROM |
| (Electronically Erasable Read Only Memory chip) used to store |
| configuration information. See EEPROM. |
PCI | Peripheral Component Interconnect. A local bus specification that allows |
| connection of peripherals directly to computer memory. It bypasses the |
| slower ISA and EISA buses. |
Glossary of Terms and Abbreviations |