Справочник Пользователя для Sun Microsystems SL8500

Library Complex

96154 • Revision K

Chapter 1 Introduction 19

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The system PDU, connected directly to the branch circuit, provides AC power to 

three DC power grids and the electronics control module. 

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The N+1 PDU supplies added +48 VDC load sharing power to each of the three DC 

power grids and an extra AC-to-DC power supply for the electronics control 

module. 

The base power configuration provides power to the:

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Tape drive power supplies

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Robotic rail power supplies

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Customer Interface Module power supplies

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Touch screen operator control panel

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Electronics control module power supplies

The base power configuration does not offer redundant AC power.

2N Power Configuration

The 2N power configuration contains the base power configuration (PDU 1) and a 

second PDU, PDU number 2. 

This configuration provides power to the same components as N+1, plus power for:

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Optional, redundant load sharing power supplies

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Two additional accessory racks for customer components

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Redundant controller cards

The 2N PDU is required for the 2N drive power, 2N robotic power, and also for 

the additional rack installed.

Library Complex

A library complex is created by connecting two or more SL8500 libraries together with 

Pass-thru Ports (PTPs).

The maximum size library complex possible consists of either:

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32 libraries for Host Software Component (HSC) systems, connected through PTPs, 

containing over 320,000 cartridge slots and 2,048 tape drives.

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31 libraries for Automated Cartridge System Library Software (ACSLS) connection, 

connected through PTPs, containing over 320,000 cartridge slots and 1,984 tape 

drives.

A library complex with functional pass-thru ports (PTPs) cannot be partitioned. 

All PTPs must be disabled before partitioning can be enabled. See 

 for details.