How dbnodeupdate.sh takes your OS backup?

Backup OS

It took 20 min to complete backup.It depends on the size of your volume.During backup process it basically take the snapshot of active LVM (logical volume –>/dev/mappper/VGExaDB-LVDbSys1) and copy to inactive LVM (logical volume –>/dev/mappper/VGExaDB-LVDbSys2).Open an another session and type df -h command.it shows you how it creates spare mount point.

 

If something go wrong and OS not come up successfully, linux is able to use your backup image.

How to recover from a failed Linux Exadata DB Server dbnodeupdate or rollback (Doc ID 1952372.1)

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