Hardware Components
1-4 StorageTek SL8500 Library Guide
Electronics Control Module
The electronics control module (ECM) is responsible for electronics control, robotic and
drive control, and host connectivity. The ECM is located in the rear of the library in the
DEM. The main controller cards are the HBCR (library controller) and HBT (drive
controller).
Figure 1–3 Electronics Control Module
Figure Legend:
1. Serial port (reserved)
2. Serial port (CLI port for service representatives)
3. Primary Ethernet port
4. Dual TCP/IP Ethernet port
5. Ethernet port (reserved)
Command-Line Interface (CLI)
The command-line interface (CLI) is used by Oracle support to configure and diagnose
the library. Service representatives can access the CLI through the electronics control
module:
■ Serial Port Connection on the HBCR card (RS-232) and a HyperTerminal
connection to enter the commands.
■ Ethernet Port Connection (ports 1A, 2A, or 2B) on the HBCR card and a secure
shell (PuTTY) to enter the commands.
Redundant Electronics Option
The optional redundant electronics (RE) feature provides failover protection with a
second set of controller cards including HBCR, HBT, HBS, and an internal Ethernet
switch. If an active controller experiences errors, operations switch automatically to a
stand-by controller, with minimal disruption to library and host operations. For more
information, see "Redundant Electronics Overview" on page D-1.
Cartridge Access Ports (CAPs)
CAPs import and export cartridges. There are two types of CAPs:
■ Bulk CAP
■ Rotational CAPs (legacy)
An SL8500 library cannot contain both CAP types. It may contain either the bulk CAP,
or a maximum of two rotational CAPs.
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