Online JFS layout 4 and 11.3x

[William R Bowen]

We are migrating an application from an 11.11 system to an 11.31 system and we hae used vxupgrade to migrate the JFS layouts to version 4 so that they data may be mounted temporarily to to new system as a mock migration.
We have the need put these filesystems back on its original host which is why we only upgraded to layout 4. During the migration, we may have the need to increase some of the version 4 filesystems, is this possible without fsadm changing the filesystem layout type to something other than version 4? If it does change them then we can not move the filesystems back to the original host as required.

Thanks for your input

[James R. Ferguson]

Hi William:

If by "increase some of the version 4 filesystems" you mean increase their size, that won't change the layout version. Thus, they will still be mountable on your 11.11 system.

Regards!

...JRF...

[William R Bowen]

Thanks James!

Yes, I mean if I did an lvextend and then fsadm complete the filesystem extention
I didn't think it would change the layout, but I just wanted to have a second opinion.