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Chapter 12. Software for IBM iSeries and AS/400e systems 415
12.3 OS/400 upgrade paths
The following table shows the valid upgrade paths for OS/400.
Refer to the appropriate software installation manual for instructions to upgrade software.
Single step RISC-to-RISC upgrades are supported as normal upgrade procedures.
12.4 Current-release to previous-release support for OS/400
The Target Release (TGTRLS) parameter specifies the valid OS/400 release of the operating
system on which you intend to restore and use the object.
To:
F r o m :
V4R1 ** V4R2 ** V4R3 ** V4R4 ** V4R5 ** V5R1 ** V5R2 **
V3R2 X
*
X
*
X
*
X
*
X
*
-
V3R6 X-----
V3R7 XXX - -
V4R1 XXXX-
V4R2 XXX-
V4R3 X X -
V4R4 XX
V4R5 XX
V5R1 X
V5R2
* OS/400 V4R5 is the last release to offer single-step CISC-to-RISC upgrade capabilities from V3R2.
** Withdrawn from IBM support.
Values for TGTRLS parameter
Current iOS/400 release *CURRENT *PRV Other valid values
V5R2 V5R2 V5R1 V4R5
V5R1 V5R1 V4R5 V4R4
V4R5 V4R5 V4R4 V4R3 V4R2 V3R2