• Thanks for your response it is good to know that it could have been done without corruption - I was just being conservative due to the length of the recovery if corruption did occur.

    With the database in recovering state, would all of the log backups have been needed to allow SQL to roll back the index? From the lack of free space in the database I don't think that it was building a new index in parallel, so I don't see where else the data for the rollback would be stored.

    Regards

    Andrew