If you use a backup application e.g. backup exec/veeam for backing up of virtual servers, if the backup job completes fine day in day out, and assuming you have selected all relevant drives etc when you come to restore can there still be issues in restoring the data if the backup file is available, e.g. the storage hosting the backup files is online and healthy (these are disc based on not tape based)?
Can you give some examples of the type of issues that could STILL prevent the restore of the data from within the backup itself, this justifying the benefits of a test restore schedule. I totally get test restores are a good idea for many scenarios, e.g. to find if you have missed critical data off the backup selection list and therefore wouldn't be able to restore it, or to find issues with the backup media itself, e.g. tape failure, but I would be very interested to hear what kind of issues can still prevent the restore of data if a backup has been successful created each day, all relevant data was backed up, and the backup file is easily accessible on disc.