Recently we were working on the DR exercise . we were trying to restore the mksysb and faced some unique issue . After checking the IBM sites also we were not able to get the satisfactory steps to resolution .
Issue noticed and troubleshooting steps:
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- while restoring , we were recieving the below errors and it was redirecting us to the main page ,language selection page after this .
- we noticed that ,the system was getting error while pharsing the image.data file and was throwing the error "image.data has invalid logical volume data" .
- further for isolating the issue . we again created the new image.data file from the source servers and again tried to restore themksysb after adding the image.data resources .
- But no luck , after this also we were facing the same errors. This make us clear that there is no issues with the image.data file , but issue with the content of the image.data file .
- We tried to again validate the image.data files from many of the other servers which were successfully restored .
- After lot of investigation and validating the many image.data files of the successfully restored servers , we figured out that , the problematic server was not having paging space(hd6) defined under rootvg .
Resolution :
- As a hit and trial method , We edited the image.data file of the server and added the paging space logical volume into it .
- Created new image.data resource and assigned it to nim-client .
- After doing so , the NIM mksysb restoration started smoothly without any issues .
