4.3. Chapter Summary

Operating Systems and SCSI I/O

  • Applications view storage resources as abstract representations of the underlying physical devices.

  • I/O requests are generated by applications, files systems, and operating systems.

  • Logical storage identifiers (for example, the F: drive) are mapped to the SCSI addressing scheme of bus/target/LUN.

  • The mapping function is provided by device drivers that support SCSI ports or adapters.

  • The supporting SCSI infrastructure may also provide additional mapping between the conventional bus/target/LUN addressing and the address scheme required for that topology.

SCSI Architectural Model

  • SAM-2 separates SCSI commands from SCSI delivery protocols and underlying interconnects.

  • SAM-2 defines SCSI relationships ...

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