Kernel Upgrade on Windows

[former_member759680]

Hello,

While performing Kernel Upgrade (4.7 Enterprise Edition), I noticed that the in the system the following 2 directories have the same kernel files

G:\usr\sap\B47\SYS\exe\run

G:\usr\sap\B47\SYS\exe\nuc\NtIntel

There can't be 2 kernel directories. So I tried looking for Parameter - DIR_CT_RUN in the START profile.

But I couldn't find DIR_CT_RUN

So, which one of the above 2 directories is the Kernel directory?

And why are there 2 directories having the same kernel files?

Thanks.

Edited by: Gautam Poddar on Jul 21, 2009 8:43 AM

[Former Member · Accepted solution]

Hi,

In one of my R/3 4.7 system, I have got these kernel directories on the CI/DB server :

T:\usr\sap\PLG\SYS\exe\run where the running kernel is found

T:\usr\sap\PLG\SYS\exe\nuc\NTAMD64

T:\usr\sap\PLG\SYS\exe\nuc\NTI386

T:\usr\sap\PLG\SYS\exe\nuc\NtIa64

Why because the central instance server runs on Windows Itanium 64 bit and we have some application servers running on Windows Intel x86 32 bit and some others on Windows Intel x86 64 bit.

At startup, the server (central or app server) copies the main kernel executables from the right architecture to the right running kernel directory.

This is a way to mke sure that all serevers from the same SAP system run the same kerne l patch level for the right architecure.

Regards,

Olivier

[former_member759680 · Accepted solution]

Thanks Olivier. That makes it a lot clearer.

So, while doing Kernel Upgrade, I just need to copy the new files to - \usr\sap\SID\SYS\exe\run ?

Then during startup, the system will automatically copy them into - \usr\sap\SID\SYS\exe\nuc\NTIntel

Am I right?

[Former Member · Accepted solution]

Dear Gautam,

As per my knwoledge, first files should be copied to \usr\sap\SID\SYS\exe\nuc\NTINTEL and this will automatically copy the files to \usr\sap\SID\SYS\exe\run at the time of startup

Rgds...Sharath

[JPReyes · Accepted solution]

On windows files need to be copied to \usr\sap\SID\SYS\exe\run as per,

SAP Note 19466 - Downloading SAP kernel patches

Regards

Juan

[Former Member · Accepted solution]

Hi,

>So, while doing Kernel Upgrade, I just need to copy the new files to - \usr\sap\SID\SYS\exe\run ?

>Then during startup, the system will automatically copy them into - \usr\sap\SID\SYS\exe\nuc\NTIntel

This is just the contrary : Files are copied from \usr\sap\SID\SYS\exe\nuc\NTIntel (architecture reference) to

\usr\sap\SID\SYS\exe\run (running kernel)

But you still have to update both directories because sapcpe does not copy all kernel files, just the main ones.

Regards,

Olivier

[Former Member]

Hi

You can check this link for more clarity

http://www.saptechies.com/installing-640-kernel-in-sap-web-as-610620/

Regards

Uday

[Former Member]

Hi

G:\usr\sap\B47\SYS\exe\run is default kernal directory

Regards,

babitha

[former_member759680]

So could you tell me the significance of -

G:\usr\sap\B47\SYS\exe\nuc\NtIntel

Because I thought this was the kernel directory

[Former Member]

HI,

this directory " G:\usr\sap\B47\SYS\exe\nuc\NtIntel " contains old kernal backup files

Regards,

Babitha

Edited by: babitha.m on Jul 21, 2009 8:58 AM