All of my objects used standard redundancy. My recollection is that regardless of object class, you will get a 405 error if you try to fetch an object that has

All of my objects used standard redundancy. My recollection is that regardless of object class, you will get a 405 error if you try to fetch an object that has been lost. I didn't use SNS notifications at the time (which might only work for reduced redundancy). So that left two options: find out when attempting to fetch the object, or run bookkeeping jobs against the object catalog to periodically spider the data and ferret out any objects that are lost. The second option may be a tad nicer, but it is also more complex and more expensive and the end result is the same either way.