On 25.07.19 18:21, Max Reitz wrote: > On 25.07.19 17:28, Maxim Levitsky wrote:
[...] >> For example, QMP reference states that MIRROR_SYNC_MODE_TOP copies data in >> the topmost image to the destination. >> If there is only the topmost image, I could image the caller assume that >> target is identical to the source. > > It doesn’t say that it copies the data in the topmost image. It says it > copies the data *allocated* in the topmost image. It follows that it > will not copy any data that is not allocated. (I just saw that MirrorSyncMode indeed just says “data in the topmost image”. I was looking at DriveBackup and blockdev-backup, which say “only the sectors allocated in the topmost image”. I think what DriveBackup and blockdev-backup say takes precedence here.) Max
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