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Forum Discussion
TimeMachine Backup question
I want one disk in my NAS (currently deciding between DuoV2 and NV+V2 - would probably buy an Ultra if it had USB3.0 Ports) to be dedicated for TimeMachine backups for my two Mac notebooks. AFAIK you...
fesh wrote: for the NAS it will just be one big file located on its Ext4 formatted disk, right?
No - the target is a sparsebundle disk image which, while appearing as a single disk image to Time Machine is in fact a data structure consisting of multiple smaller files (IIRC 8MB blocks)
Try creating one on your Mac using disk Utility, and explore it to see how the image is built.
fesh wrote: Or does the NAS know that the last TM run only changed less than 1MB, and so only needs to transfer that changed 1MB to the external USB drive?
All backups are incremental (except the first) - only data changes are backed up.
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