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- SBA: system bus adapter
- LBA: local bus adapter
- Device number: identification of an individual device (e.g., and an Ethernet card).
- Function: identification of a particular unit of functionality (e.g., one Ethernet port or one SCSI bus) on a specific device. There can be up to four functions per device.
- Target: optional further identification. Its use depends on the type of device connected. For example, a SCSI target ID.
- LUN: logical unit number of SCSI devices (e.g., disks and tapes). Used to address a logical unit associated with a SCSI target ID.
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