Discussions about nuances of using tape as a backup target.
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Posts: 51
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Joined: May 25, 2022 2:44 pm
Full Name: Jack T.
Location: United Kingdom

VM Size Question

Post by JackT »

Was just wondering, does Veeam backup the whole size of a Virtual Machine? We're struggling with a 2.6TB VM when it's only used 1.1TB on it's VHD. Any help is appreciated :)

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Full Name: Fabian K.
Location: Switzerland

Re: VM Size Question

Post by Mildur »

Hi Jack

Is this a tape question?
Backup of VMs are normally Backup Jobs to Disk.

What sort of issues do you see?

Our product will use compression and deduplication in backup jobs when storing a backup file in the repository. Empty blocks and pre-allocated blocks will not be stored in the backup file.
https://helpcenter.veeam.com/docs/backu ... ml?ver=110

For VmWare and HyperV backup we also have an option to ignore blocks inside the virtual disk which are marked as deleted.
This only works for NTFS. If you have a reFS or another type with blocks marked as deleted, veeam will backup these blocks.

https://helpcenter.veeam.com/docs/backu ... ml?ver=110

Product Management Analyst @ Veeam Software
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