Fusion 2 & Time Machine - best practices

With regard to the use of Time Machine backup virtual machines: my best reading of the various positions is "it works but don't do it."

(1) unusual can happen to the virtual machine. SCARY

(2) the backup drive will be consumed quickly. I always check this by looking at the rate at which free space is consumed. A tech rep Apple is said to be "file deltas" are stored - i.e. If the file then change only the changed items are written on the next backup, not the entire file. From there, I concluded that Time Machine is looking at allowance individual disk (blocks) units. This seems to be just what is called for with a file of the machine virtual multi GB. Hmm... not sure that I am continuously on the ground here.

In any case, can someone provide the consensus of the bottom line - I should exclude the virtual machines from Time Machine backups or not?

Best regards

Robert

RobertVaessen wrote:

A tech rep Apple is said to be "file deltas" are stored - i.e. If the file then change only the changed items are written on the next backup, not the entire file.

Either Apple technology does not know what he was talking about or you misunderstood or both.

From there, I concluded that Time Machine is looking at allowance individual disk (blocks) units.

This isn't how Time Machine works.  After the initial backup, which is a backup full, he then made incremental backups at the level of the file system not at the level of the block, and as such, there is more of that potential do not have all of the files that make up the full package of Virtual Machine backed up in its entirety.

In any case, can someone provide the consensus of the bottom line - I should exclude the virtual machines from Time Machine backups or not?

While Time Machine can back up and restore a virtual machine with success there are a number of conditions that can cause this to fail and without warning, and therefore it is not considered reliable for backup of Virtual Machines under normal conditions.

AFAIC backup is valid of a Virtual Machine is when it is done with the Virtual Machine to stop, not suspended and closed merger and the entire Virtual Machine is copied to another location in which one has a little bit duplicate of the complete set of the VM total at this point in time, and nothing less.

Tags: VMware

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