Today I want to explain the different backup methods and their (dis-)advantages a bit more in detail. But let’s start with some background information: The Archive Bit The archive bit is a file attribute used in Microsoft Windows to flag newly created and changed files. This attribute can be interpreted (and changed) by backup products. […]
Some hardware vendors offer so-called virtual tape libraries (VTL) in their portfolio. A VTL is a server, usually run with a proprietary operating system. Those servers offer a defined amount of internal storage that they present over the network. They do this by simulating a tape library to the backup server. Most of the machines
In parallel to the file-based backup we produce with Backup Exec, there are software products that create images (snapshots) of whole volumes to back up he data contained. These images are usually stored locally on a disk oft he imaged server but can also be transported over the network or coped to removable devices. Hint:
As I wrote in Chapter 0, my personal opinion on why we do backups is, because we want (and have) to be able to do restores. In other words: Define, which data you need to restore in which amount of time. When you did this in detail, it’s quite easy to define, how your backups
How much space do you need to provide for backup purposes? Of course, my answer is again: it depends. There are some questions to be answered before you can make an educated guess about this number. And sorry, it won’t be more than a guess. Fist of all, we need the amount of data to