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This would be a major simplification that reduces the code size significantly, making QEMU's audio backend smaller and easier to maintain. QEMU has added command primitives that can be combined to perform both full and incremental disk backups while the virtual machine is running. A full backup copies the entire contents of the disk. An incremental backup copies only regions that have been modified. Orchestrating a multi-disk backup to local or remote storage is non-trivial and there is no example code showing how to do it from start to finish. It w