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 device connection to |
| the host. |
Internal SCSI | A SCSI device installed inside the computer cabinet. These devices are |
Device | connected to one another with an unshielded ribbon cable. |
PCI and | Peripheral Component Interconnect. A high performance local bus |
| specification that allows connection of devices directly to computer |
| memory. The PCI Local Bus allows transparent upgrades from a |
| data path at 33 MHz to a |
| path at 66 MHz to a |
| path at 133 MHz to a |
Peripheral | A piece of hardware (such as a disk drive, printer, or |
Device | a computer and under the computer’s control. SCSI peripheral devices |
| are controlled through a SCSI host adapter. |
SCSI Bus | A host adapter and one or more SCSI devices connected by cables in a |
| linear configuration. The host adapter may exist anywhere on the bus, |
| allowing connection of both internal and external SCSI devices. A system |
| may have more than one SCSI bus by using a |
| or by using multiple host adapters. |
SCSI Device | Any device that conforms to the SCSI standard and is attached to the |
| SCSI bus by a SCSI cable. This includes SCSI host adapters, SCSI disk |
| drives, SCSI |
SCSI ID | An identifier that addresses specific devices on the SCSI bus and |
| determins device selection when multiple devices contend for ownership |
| of the SCSI bus. Wide SCSI buses support SCSI IDs 0 through 15, and |
| narrow SCSI buses support SCSI IDs 0 through 7. A device gains |
| ownership of the bus according to the priority of its SCSI ID. The order |
| of priority, from highest to lowest, is: 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, |
| 11, 10, 9. The host adapter is usually set to the highest priority SCSI ID, |
| which is SCSI ID 7. |
A hardware specification for connecting SCSI devices. It references each | |
SCSI | SCSI signal to a common ground. In contrast, differential SCSI uses a |
| separate ground for each signal. |
Glossary of Terms |
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