- IPL type A
- Use IPL type A when directed for special work, such as applying program temporary fixes (PTFs) and diagnostic work. For example, use IPL type A in the following circumstances:
- When IPL type B fails
- When the procedures direct you to use IPL type A
- When you suspect problems with temporary Licensed Internal Code PTFs
- IPL type B:
- Use IPL type B for routine work and when directed by a PTF procedure. This type of IPL runs the newest copy of Licensed Internal Code and is necessary when you permanently apply certain PTFs.IPL type B uses the B copy of Licensed Internal Code during and after the IPL. This copy is said to reside in System Storage Area B. This copy contains temporarily applied PTFs.
- IPL type C
- This type of IPL is reserved for hardware service representative use under the direction of Rochester development support. Attention! Do not use this function! Severe data loss can occur with improper use of this function.
- IPL type D
- Use IPL type D when directed for special work, such as installing and reloading programs. IPL type D loads the system programs from an alternate IPL load source, such as a tape drive or CD-ROM.
Usually an IPL uses programs stored on the primary IPL load source (usually a disk drive). Sometimes it is necessary to perform an IPL from another source, such as programs stored on tape. To do this, you must use IPL type D to IPL from the alternate IPL load source.
Use IPL type D only during one of the following situations:- When install or restore procedures direct you to use IPL type D
- When IPL type B and IPL type A fail (when the primary IPL load source cannot IPL the system properly) and only when directed by your support personnel
- When service directs you to perform an alternate install
IPL types: The IPL type determines which copy of programs your system uses during the initial program load (IPL).
There are four IPL types: Restart *YES / *No
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