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Chapter 2. Host Software Component Functions 19
1st ed., 6/30/04 - 312579601
Chapter 2. Host Software Component Functions
Overview of HSC Functions
This chapter describes the basic function of the HSC. Functions for each of the HSC
components fit within the architecture structure presented in Figure 1 on page 4. Not all of
the components of the architecture structure have functions directly visible to you. Only
those HSC functions that you can control or those that are operationally apparent are
described in this chapter.
System functions relating to HSC architecture components represented in Figure 1 on
page 5 include:
• installation
• initialization/termination
• mount/dismount processing
• volume/cell control
• CAP processing
• common recovery
• command
• utility
• LMU server
• communications
• tape management interface (TMI)
• batch application program interface.
The Automated Cartridge System provides the facilities and software to perform various
functions with or without operator intervention. Such major system functions are
described in this chapter.
Automatic Functions of the HSC
Among the functions handled automatically by the HSC are:
• mounting and dismounting of cartridges
• automatic and manual operating modes
• handling of abnormal situations occurring during mounting or dismounting of
cartridges
• Cartridge Access Port processing to allow the operator to enter or remove cartridges
• tape management system assistance