IBM 6C1, Service Manual

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2. Turn off the system.
3. Wait 30 seconds, and turn on the system.
4. After the keyboard indicator appears during startup, and before the tone sounds,
press the F6 key on a directly attached keyboard (or the number 6 key on an ASCII
terminal).
5. Enter any requested passwords.
After any requested passwords have been entered, the system attempts to boot from
the first device of each type found on the list. If no bootable image is found on the first
device of each type on the list, the system does not search through the other devices of
that type for a bootable image; instead, it polls the first device of the next type.
If all types of devices in the boot list have been polled without finding a bootable image,
the system restarts, this gives the user the opportunity to start the System Management
Services (by pressing the F1 key on a directly attached keyboard or the number 1 on
an ASCII terminal) before the system attempts to boot again.
Default Boot List and Service Mode Boot List
The default boot list is:
1. Diskette drive
2. CD-ROM drive
3. Tape drive
4. Disk drive
5. Network adapter
v
Token-ring
v
Ethernet
Pressing the F5 key on a directly attached keyboard (or the number 5 key on an ASCII
terminal) causes the system to load Standalone Diagnostics provided that a
diagnostic CD is present in the CD-ROM drive.
Pressing the F6 key on a directly attached keyboard (or number 6 key on an ASCII
terminal) loads Online Diagnostics using the service mode boot list. No diagnostic CD
should be in the CD-ROM drive because Online Diagnostics are typically run from a
hard disk. Like the default boot list, the service mode boot list can contain five entries.
The F6 and 6 keys work like the F5 and 5 keys, with the following exceptions:
v
The system searches for a boot record according to the service mode boot list.
v
If the service mode boot list is discovered by a cyclical redundancy check to be
corrupted, the system rebuilds the service mode boot list according to the default
boot list. (The default boot list contains five entries, and for each matching device
type found in the system unit, the system makes an entry in the service mode boot
list.)
v
If no service mode boot list is present, the system uses the default boot list.
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Service Guide