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Using the CPU Enclosure
2-3
Setting the Key Mode Switch
The key mode switch has three positions:
•
– Normal
•
– Secure
•
– Service
The switch is used to establish the initial program load (IPL) path. The IPL loads the system
programs, checks the system hardware, and prepares the system for user operation.
Before starting the system unit for normal day-to-day operation, set the key mode switch to
the Normal (
) position. This permits the operating system to load after the power-on
self-tests (POSTs) are completed.
This system has an electronic mode switch feature. This feature allows the operator to
change the IPL mode from the SystemGuard console or system console without changing
the physical key mode switch. This function is controlled by flags (permissions). The
functions of the electronic mode switch are the same as the physical key mode switch. Refer
to “Physical and Electronic Key” on page 3-4.
Note: It is possible to set the Electronic Mode Switch (E-Key) through SystemGuard
firmware from the local or remote SystemGuard BUMP console. In Normal mode an
electronic key may be used to set Normal, Secure and Service modes. For remote
maintenance, see “Electronic Mode Switch” page 3-4. In Secure and Service
modes, the physical key setting prevails.
Key Mode Switch
Normal
Secure
Service
Operator Panel
Summary of Contents for ThinkPad R30
Page 1: ...7015 Models R30 R40 and R50 CPU Enclosure Operator Guide...
Page 12: ...xii Operator Guide...
Page 16: ...xvi Operator Guide...
Page 20: ...1 4 Operator Guide...
Page 132: ...4 10 Operator Guide AC Rack Cables and the CPU Enclosure Connectors CPU Enclosure...
Page 156: ...6 4...
Page 194: ...10 4 Operator Guide...
Page 238: ...B 8 Operator Guide...
Page 248: ...D 4 Operator Guide...