IPL type, mode, and speed options

Set the initial program load (IPL) options from function 02 on the control panel. To permanently change the IPL speed use the CHGIPLA command.

Note: Systems managed by the management console should use the management console to perform control panel functions.
  • 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.
  • 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

  • Use CHGIPLA *MIN, or function 02 F or V=F for most IPLs (to perform a fast IPL that uses minimum diagnostics).
  • 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).
  • Use CHGIPLA *ALL, or function 02 S or V=S during the first 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.