IBM I Kernel downgrade from 741_ext to 721_ext

[Amarnath]

Hi Experts,

I am in a very tough situation. We have restored the production data to test system (Cleared library R3TTTDATA in test system and restored R3PPPDATA )

Created journals and catlogs as well.

I have noticed my test system is with 741 kernel where as my production is at 721 kernel now I am not able bring the system up.

I assume the only solution is to downgrade the kernel in my test system. Could you please help me in this tough situation. What all steps I need to take to downgrade the kernel version.

Please guide me with detailed steps.

Thanks,

Amarnath

[christoph_ostrop · Accepted solution]

Hi,

what system (netweaver version) did you have on produktion and on test system ?

ensure first, what Kernel is needed and released for your netweaver system

sapnote: 1097751 - iSeries: Information and recommendations for kernel libraries

http://service.sap.com/sap/support/notes/1097751

sapnote: 1994690 - Using the 7.41 kernel instead of 7.40

http://service.sap.com/sap/support/notes/1994690

sapnote: 2128122 - Use of 7.42 kernel instead of 7.40 or 7.41 kernel

http://service.sap.com/sap/support/notes/2128122

sapnote: 1716826 - Usage of the downward compatible kernel 721 (EXT)

http://service.sap.com/sap/support/notes/1716826

regards

[Amarnath · Accepted solution]

Hi Christoph,

The note 1097751 you have provided was very useful and got the system online Thanks a lot for the information provided.

Now I am not able to login with SAP*. I have deleted it from OS level but the ID is not re-creating by itself.

Could you please guide me with this.

Regards,

Amarnath

[Amarnath · Accepted solution]

Hi Christoph,

Could you please help me how to recreate SAP* in AS400.

Regards,

Amarnath

[christoph_ostrop · Accepted solution]

Hi,

maybe this scn-Thread will help

Forgot password of ddic and SAP * user | SCN

or

https://scn.sap.com/thread/1262802

or

or have a look at this sapnotes:

Check notes:

2383 - Dokumentation: Beschreibung der "Super-User" SAP*

http://service.sap.com/sap/support/notes/2383

8852 - Logon with SAP* password 06071992 not possible

http://service.sap.com/sap/support/notes/8852

or

68048 - Deactivating the automatic SAP* user

http://service.sap.com/sap/support/notes/68048

regards

Christoph