ACSLS and SL150 Library Differences
This section discusses ACSLS and SL150 library differences.
Library Configuration
-
ACS, LSM - SL150 library is an ACS with a single LSM (1 ACS and 1 LSM).
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SL150 does not currently support the pass-thru port.
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SL150 has at least one base module, and can have up to nine expansion modules.
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ACSLS considers each SL150 module as a panel.
-
SL150 libraries managed by ACSLS reports 6-character
volserlabels through ACSLS interface.
Identifying Library Locations
This section discusses library locations.
Addressing schemes
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ACSLS addressing is ACS, LSM, panel, row, column.
-
SL150 addressing is module, sides, row, column for storage cells.
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ACSLS addresses are zero-based. They start with panel 0, row 0, and column 0.
-
SL150 libraries are one-based. They start with module 1, row 1, and column 1.
-
In order to ensure consistency between the SL150 library and ACSLS internal addresses, ACSLS defines placeholders for panel 0, row 0, and column 0.
Row Numbers
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Within each module (panel), rows are numbered 1-3.
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Rows are numbered consecutively from the top down.
-
Numbering is identical between the SL150 and ACSLS.
Column numbers
SL150 Addressing:
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module, side, row, column
-
Columns 1-5, front to back on each side
ACSLS Addressing:
-
Numbered from 1 to 10.
-
Columns 1-5 are on the left side from front to back.
-
Columns 6-10 on are the right side from front to back.
Drive addresses
SL150 addressing:
-
module, position
-
module 1 = base
-
modules 2-10 = expansions
-
position = top to bottom
ACSLS addressing:
-
ACS, LSM, panel, drive
-
Panel = module
-
Drive number = 1-20, numbered from top to bottom
Table E-1 Example of drive addressing
| Module | ACSLS Drive Identifier | SL150 Drive Address |
|---|---|---|
|
Base module |
0, 0, 1, 1 |
1, T |
|
- |
0, 0, 1, 2 |
1, B |
|
Expansion module |
0, 0, 2, 3 |
2, T |
|
- |
0, 0, 2, 4 |
2, B |
|
Expansion module |
0, 0, 3, 5 |
3, T |
| - |
0, 0, 3, 6 |
3, B |
|
Expansion module |
0, 0, 4, 7 |
4, T |
|
- |
and so on. |
and so on. |