1. Administrator's Guide
  2. ACSLS Support of the SL8500
  3. Understanding SL8500 Internal Addresses and ACSLS Addresses

Understanding SL8500 Internal Addresses and ACSLS Addresses

There are differences in the internal addresses of the SL8500 and other libraries supported by ACSLS and HSC.

  • The SL8500 is one's-based (1) and uses negative numbers.

  • Other libraries use a zero-based (0) with no negative numbers.

  • The SL8500 uses five parameters: library, rail, column, side, and row.

  • Legacy StorageTek libraries (such as 9310) use: ACS, LSM, panel, row, and column (HLI–PRC).

Table C-1 SL8500 Addressing Descriptions

HLI-PRC SL8500 Description
ACS Library Number of the specific SL8500 library in a library complex. An ACS is a SL8500 library complex. There can be multiple SL8500s in a library complex.
LSM

LSM 0-3

Rail

Rail 1-4

The SL8500 library has four rails that the HandBots travel, which are numbered from top to bottom 1–4 (one's-based).

ACSLS considers each rail to be a separate LSM, numbered from top to bottom 0–3 (zero-based).

Panel

Panel 0

Panel 1

Panel 2-n

 Column

CAP Drives

Storage slots

Columns indicate the horizontal location in the library. As viewed from the front of the library column and panel numbers start at the center of the drive panel (1) and sweep forward with increasing numbers.

(The SL8500 does not use panels as an address.)

An HLI panel spans across the width of the library to include both sides (left and right) and both walls (inner and outer) for each LSM.

- Side

Wall location:

Outer wall

Inner wall

HandBot number:

Left (–)

Right (+)

Row Row Rows indicate the vertical location of a tape cartridge and are numbered from the top—down.
Column -

Rows for the HLI address are:

Storage panels start at 2 with Column 0 = left and Column 1 = right

Rows 0–12 outer walls

Rows 13–26 inner walls

Each column in a normal storage panel has 27 rows.

For a total capacity of 54 cartridges per panel.

Rows for the SL8500 address are:

Storage slots start at Column -3 = left Column +3 = right

Rows 1–13 outer wall

Rows 1–14 inner wall

  • Zero-based numbering (as with HLI) starts numbering at 0.

  • One-based numbering (as with the SL8500) starts numbering at 1.

  • This is an important difference in the numbering sequences between software (ACSLS or HSC) and hardware (physical SL8500 addresses)