Sun Microsystems SL8500 manual Library Complex, 2N Power Configuration

Library Complex

■The system PDU, connected directly to the branch circuit, provides AC power to three DC power grids and the electronics control module.

■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:

■Tape drive power supplies

■Robotic rail power supplies

■Customer Interface Module power supplies

■Touch screen operator control panel

■Electronics control module power supplies

Note – 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:

■Optional, redundant load sharing power supplies

■Two additional accessory racks for customer components

■Redundant controller cards

Note – 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:

■32 libraries for Host Software Component (HSC) systems, connected through PTPs, containing over 320,000 cartridge slots and 2,048 tape drives.

■31 libraries for Automated Cartridge System Library Software (ACSLS) connection, connected through PTPs, containing over 320,000 cartridge slots and 1,984 tape drives.

Note – A library complex with functional pass-thru ports (PTPs) cannot be partitioned. All PTPs must be disabled before partitioning can be enabled. See “Library Partitioning” on page 22 for details.

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