Restores with differential backups

Hows are restores from full ( init) & differential backups effected if you don’t know or have the incr_backup_id ? For example say my backups are stored on NFS share ( full with differenitials for a week) . and something happens to the cluster and it needs rebuilt. At this point I don’t have a incr_backup_id to use to
restore db "wifth file =x ". What are my options for restoring ?

Check your backup directory. Do you see file names like %d.fin where %d is a number. If you do, try to cat the file with the largest number. You can validate the timestamp in it. The %d is your latest incremental backup id.

Let us know if you have any problems locating this incremental backup id.