I am planning make an O.S. upgrade from V5R3M0 to V5R4M0 with R/3 4.6C kernel 4.6D_EXT 2341 level.
Our landscape is a DB server with two application servers (all over iseries V5R3M0).
I review the OSS notes
Note 68440 - AS/400:How do I upgrade to a higher OS/400 Release?
Note 156557 - Released operating systems SAP Kernel 4.6x DB2/400
In this notes i see that our kernel version is OK.
I dont know wich secuence follow for decrease the dow time in our 3 servers.