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cke
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Full Name: Chris Keschnat

Size of full backup not changing after injection?

Post by cke » Apr 22, 2015 8:03 am

Hey,
please help me understand. I have a forever forward backup. My understanding was that incremental backups get injected into the full backup. However the size of the file never changes (not in the Backup properties and not in Windows Explorer).
Is this as intended? Are there some kind of reserved blocks in the vbk that just get filled? Here is an example screenshot with shots taken two days in a row and it looks as if there was just one file deleted and one file added.
Image

foggy
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Re: Size of full backup not changing after injection?

Post by foggy » Apr 22, 2015 9:53 am

Chris, this could mean that no essentially new blocks were backed up during the corresponding incremental job run, so all the blocks from the increment have replaced their previous "versions" stored in the full backup. Another point to consider is that once the block is deleted, it is not physically removed but just marked as free and can be subsequently reused by other data.

veremin
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Re: Size of full backup not changing after injection?

Post by veremin » Apr 22, 2015 10:16 am

If you feel worrisome about the oldest restore point, there is no preventing you from performing test restore to confirm its recoverability. Thanks.

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