1. Library Guide
  2. Library Addressing Reference
  3. Comparison of Cell Addressing Schemes

Comparison of Cell Addressing Schemes

The library has two main addressing schemes to identify each component in the library.

  • Library Cell Addressing Scheme (Library, Rail, Column, Side, Row) — used by the firmware and internal communications to represent all devices and locations within the library.
    • Begins at 1 and uses negative numbers.
    • Side indicates the front or back wall of the library (B or 1 for back wall, F or 2 for front wall).
  • SCSI Element Addressing — used by hosts with FC-SCSI connections to the library.
    • Uses single positive number for the element ID.
    • Storage cells begin at 2000, drive bays begin at 1000, CAPs begin at 10.
    • Unlike the SL3000, the SL4000 assigns empty drive bays an element number.
    • Default element numbering is reassigned with any library configuration change.