Sun Microsystems StorageTek StreamLine SL8500, System Assurance Manual

Page: 25 / 278

E24254-01 Chapter 1 Introduction 5
Introduction
Understanding the Address Scheme
There are differences in the addresses of the SL8500 and other libraries.
• The SL8500 is one’s -based (1) and uses negative numbers.
• Other libraries use a zero -based (0) and no negative numbers.
• The SL8500 uses five parameters: library, rail, column, side, and row.
• Other libraries use: ACS, LSM, panel, row, and column (HLI–PRC).
Table 2. Addressing Descriptions
HLI–PRC SL8500 Description
1. Outer wall
2. Inner wall
1. Left (–)
2. Right (+)
• 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.
• Storage slots start at

Column -3 = left

3 = right
• Rows 1–13 outer wall
• Rows 1–14 inner wall
• Zero-based numbering (as with HLI) starts numbering at 0.
• One’s-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)
ACS Library Number of the specific library in a library complex (ACS).

Note: An ACS contains multiple SL8500’s in a library complex.
LSM
LSM 0
➩

LSM 1
➩

LSM 2
➩

LSM 3
➩
Rail
Rail 1

Rail 2

Rail 3

Rail 4
The SL8500 library has four rails that the HandBots travel, which are
numbered from top to bottom 1–4 (one’s-based).
ACSLS and HSC 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.
Note: See Figure 3 on page 6 for an example of a storage panel .

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 HandBot number
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: Rows for the SL8500 address are: