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StorageTek SL150 Modular Tape Library Systems Assurance Guide 22579-04 |
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# A Locations

This appendix describes the SL150 Modular Library System walls (sides), tape slots, and location scheme.

## Library Walls

There are two types of walls in the library:

1. Left side wall, which consists of a 15-cartridge slot magazine array

2. Right side wall, which consists of 15-cartridge slot array magazine and 4-cartridge slot Mailslot magazine array

Figure A-1 and Figure A-2 show valid slot and drive locations.

Tapes (cartridges) placed in slots lay flat, hub down, and parallel to the floor. To prevent slippage, tapes are held within their slots by molded-in internal retainer clips.

## Tape Slot Locations

Tape locations in previous StorageTek libraries were listed by a LIBRARY Physical addressing scheme involving "Panel, Row, and Column" indices. SL150 uses the USER Physical addressing scheme which may change per the component being referenced.

Component | SCSI Element Address | USER Physical addressing
--- | --- | ---
Slot (Data) | Yes | `module`,`side`,`row`,`column`
Slot (Reserved) | No | `module`,`side`,`row`,`column`
Drives | Yes | `module`,`top|bottom`
Mailslot | Yes | `slot number`
Power Supply | No | `module`,`top|bottom`
Hand (Robot) | Yes | n/a

Figure A-1 and Figure A-2 illustrate where these terms apply; Table A-1 shows the starting element address and the maximum number of each element type when the SL150 library is installed with 10 modules.

### Slot Maps

Figure A-1 and Figure A-2 show valid storage slot, mailslot, and drive locations.

Table A-1 shows the starting element address and the maximum number of each element type when the SL150 library is installed with 10 modules.

Note: The mailslots allow an operator to insert or remove cartridges during library operations. The mailslots are also referred to as Import/Export elements or cartridge access ports (CAPs).

### Default Element Mapping

The following table shows the default first element and maximum number of elements in the SL150 library.

Table A-1 Default Starting Element Address and Maximum Number of Elements

Element Type | First Default Element Address | Maximum Number of Elements for an SL150 Library with 10 Modules
--- | --- | ---
Hand | 0 | 1
Mailslot | 10 | 4
Drives | 500 | 20
Storage Slots | 1000 | 300

The following table shows the element type and the associated numbering key in the SL150 library.

Table A-2 Numbering Key

Element Type | Numbering Key
--- | ---
Hand | Host Address: `SCSI Element Address`
Maillslot | Host Address: `SCSI Element Address` User Physical: `slot number`
Drives | Host Address: `SCSI Element Address` User Physical: `module`,`Top|Bottom`
Storage Slots | Host Address: `SCSI Element Address` User Physical: `module`,`side`,`row`,`column`
Reserved Slots | User Physical: `module`,`side`,`row`,`column`
Power Supply | User Physical: `module`,`Top|Bottom`

Figure A-1 Base Module Slots of Non-Partitioned SL150 Modular Tape Library

Illustration Legend:

1 - Module 1 (Base)

2 - Robot

3 - Power supplies

4 - Mailslots

5 - Left magazine front

6 - Right magazine front

7 - Slots available for customer data tape

8 - Tape drives

Figure A-2 Base Module and Drive Expansion Module Slots (After Configuring Reserved Slots)

Illustration Legend:

1 - Module 1 (Base)

2 - Robot

3 - Power supplies

4 - Mailslots

5 - Left magazine front

6 - Right magazine front

7 - Slots available for customer data cartridges

8 - Reserved slots (Configurable)

9 - Tape drives

10 - Module 10 (Expansion)

The library supports only HP LTO Ultrium Linear Tape-Open (LTO) Generation 5 or Generation 6 tape drives. The following table shows how many LTO cartridges can be placed in the library, depending on the modules installed.

Address numbering changes when a library is partitioned. Partition number is prefixed to the USER addressing indices (see Appendix B, "Partitioning Overview").

Table A-3 Storage Slot, Mailslot, and Drive Counts for Different Configurations

Configuration | Module 1 | Expansion Module | Total Slots | Mailslots | Maximum Drives
--- | --- | --- | --- | --- | ---
Module 1 | 30 | N/A | 30 | 4 | 2
Module 1 +1 drive expansion module | 30 | 30 | 60 | 4 | 4
Module 1 +2 drive expansion modules | 30 | 60 | 90 | 4 | 6
Module 1 +3 drive expansion modules | 30 | 90 | 120 | 4 | 8
Module 1 +4 drive expansion modules | 30 | 120 | 150 | 4 | 10
Module 1 +5 drive expansion modules | 30 | 150 | 180 | 4 | 12
Module 1 +6 drive expansion modules | 30 | 180 | 210 | 4 | 14
Module 1 +7 drive expansion modules | 30 | 210 | 240 | 4 | 16
Module 1 +8 drive expansion modules | 30 | 240 | 270 | 4 | 18
Module 1 +9 drive expansion modules | 30 | 270 | 300 | 4 | 20
Notes: 1. Expansion modules have 30 slots and 2 drives each (no mailslots) 2. When the mailslots are used for storage slots, add the mailslots count number in that column to the number in the total slots column.

### Diagnostic and Cleaning Cartridge Locations

A total of up to 3 slots are allowed to be configured within the front left (Column 1) of the base module. The reserved slots may contain diagnostic and cleaning cartridges. The customer may not elect to configure any reserved slots, in which case these are used as normal storage slots.

The user may configure up to 3 of these reserved slots in the base module magazine beginning from row 1, column 1 and proceeding to row 3 of Column 1.

Reserved slots in a partitioned library must be configured prior to enabling partitioning.