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Chapter 7. Initial Program Load (IPL) Information
IPLtype,mode,andspeedoptions......217
IPLspeedrecommendations.......217
Methods to perform IPL..........217
Alternate installation IPL .........218
IPLsequence .............218
Service processor initialization.......218
Functions performed .........218
What is initialized ..........218
Abnormal ending ..........219
Licensed Internal Code (LIC) initialization. . . 219
Functions performed .........219
Abnormal ending ..........219
Initialization output .........220
Data descriptions ..........220
Log entries ............220
Status SRCs ..............221
IPL type, mode, and speed options
Set the IPL options from function 02 on the control panel. To permanently change
the IPL speed use the CHGIPLA command.
v Use function 01 to display the current IPL option, including IPL speed. This is
the option and speed that the system will use at the next IPL. Refer to “Function
01–Display Selected IPL Type and Speed (on Systems with a Keystick)” on
page 162 for more information about function 01.
v Refer to the information in Table 15 on page 159 for speed override definitions.
v Use the HDWDIAG (hardware diagnostics) parameter of the CHGIPLA command to
permanently change the IPL speed. The values are: The default shipped value
*MIN (minimal) for fast diagnostics and *ALL for all (full) diagnostics.
IPL speed recommendations
v Use CHGIPLA *MIN, or Function 02 F or V=F for most IPLs (to perform a fast IPL
that uses minimum diagnostics).
v Use CHGIPLA *ALL, or Function 02 S or V=S, if you change hardware or suspect an
intermittent hardware failure (to perform a slow IPL that uses all diagnostics).
v Use CHGIPLA *ALL, or Function 02 S or V=S during the first Install IPL. You can
set this at the panel with Function 02; it affects only the one IPL because the
next IPL will again pick up the value set with CHGIPLA.
For more information about:
v IPL types, see Table 13 on page 159
v IPL modes, see Table 14 on page 159
v IPL speeds, see Table 15 on page 159
v Control panel functions, see “Control panel function descriptions (Models 150,
170, 250, 4xx, 50x, 51x, 530, 53S, 6xx, 7xx, SB1, and Sxx)” on page 162 or the
system operator information
Methods to perform IPL
Table 43. Methods to perform IPL
Methods Description
POR Power on reset IPL. The system was powered off and powered on. During the power on,
all hardware runs diagnostic tests.
© Copyright IBM Corp. 1997, 2002 217