If you think you know it all with regard to backup and recovery, I'm quite sure there is some little bit you are missing. One person who doesn't appear to miss much is W. Curtis Preston who, early 2007, published Backup & Recovery. The book is quite amusing, although I did wince a couple of times upon reading some of the anecdotes in the book, remembering a few of the foobars that have happened to me in the past... It is packed full of background information as to why and when to do backups, what media and devices to use, how to recover, and Preston concentrates on readily available tools which belong to Unix/Linux, Mac OS X and Windows. A few larger Open Source products are also discussed, notably Amanda and Bacula, and these certainly whet the appetite for more. Database backup for DB2, Oracle, PostgreSQL and MySQL are also discussed in detail. I highly recommend Backup & Recovery to any person in charge of backups, be it in a multi–billion–euro corporation or be it in a small office or home office, because the author has recommendations for a very low budget as well as a very high backup budget. O'Reilly have the table of contents online, and it is worth a look.