What happens to cloud backups if we start on-prem from scratch?

[CH79]

I'm trying to find out what would happen to our cloud backups if we were to to recreate the RAID volume on our NAS where we store our nightly backups and start our on-premises backups from scratch.

We use a NAS to store our on-premises Veeam backups for the last 30 days. We also have a backup copy job that uses a Veeam cloud connect partner to store backups for the last 7 days on the cloud.

We're planning on installing new larger capacity drives in the NAS and move from RAID-1 to RAID-10 which we know will mean recreating the RAID and losing all the data on the drives.

After moving to RAID-10 the drives would be blank and so new backups would have to take place.

We did think that we could take copies of Veeam backups from the NAS however they are ~8TB in size all in and we don't have another storage location to keep them (plus they would take a very long time top copy).

Hope this makes sense.

Thanks


Case # 04755827

[Vitaliy S.]

Hi Chris,

Your cloud backups will remain intact if this is what you're asking. Once you re-build your primary repository, you will need to map your new backups to the old chain stored in the cloud repository.

Thanks!

[CH79]

Thanks Vitaliy

Yes we want to ensure our cloud backups remain intact.

Once we have rebuilt the primary (NAS) repository how do we map the new backups to the old chain stored in the cloud repository?

[veremin]

Check the second point here, should clarify your questions. Thanks!

[CH79]

I was wondering if I could get some clarification on how the existing cloud backup would treat the initial on-premises backup after we have done the upgrade?

My concern is that after we have done the upgrade the first on-premises backup would of course be a full 3TB backup. How would the existing cloud backup job treat this initial backup?

Would Veeam recognise the data and continue on an incremental basis or would Veeam have to backup the entire 3TB on-premises backup to the cloud storage?

[Vitaliy S.]

It depends If nothing was re-created in the source infrastructure (IDs of all objects didn't change), then you would need to map your backups to cloud copies via the second point mentioned by Vladimir in the post above. Thanks!

[CH79]

What I'm saying is after the NAS upgrade the on-premises storage would be empty, or at least it would be until the first backup takes place. At that point the first backup would be a full backup (3TB) in size.

How would the existing cloud backups treat the new on-premises backup after we have mapped it to the cloud copies? Would the cloud copies see the new on premises backup as a brand new 3TB backup?

[Vitaliy S.]

Cloud copies would not see anything until you map the new full backup to the existing backup copy chain in the cloud. If you don't map these backups, then your backup copy job will start the new full job pass over the WAN to the cloud repository.

[CH79]

Once we map the full backup to the existing backup copy chain in the cloud, how would Veeam treat this? i.e. would it recognise the new backup as a brand new backup and upload the entire 3TB backup or would it continue on as normal and just copy what has changed (incremental)?

I'm trying to get my head around how Veeam will treat the new full backup once it has been mapped.

[Vitaliy S.]

Yes, it will recognize the existing backup and continue the incremental job pass given that all requirements are met for mapping > Limitations for Mapping

[Technogod]

From my experience.You would need to save your original backup. Add your new drives. Copy your original backup to the NAS. Map your original backups to the Cloud.

[RGijsen]

Long shot - you say you bought new disks. Couldn't you take a few of those new disks, copy the last chain to those disks (or if you still have space - create a new full so that's the only files you need to copy), install the rest of the disks in your Veeam server, install / configure the RAID10, copy the files back on it, and then expand the RAID set? It's all a hassle, but then you can be sure the mapping works fine, and as you are still working with the same backup chain, your incrementals towards your cloud will not be massive. We have the exact same config as you, 30 days in our main site, and 7 on remote, and when we upgraded our disks in the main site and made new fulls there, after mapping them to remote, we still found massive incrementals taking place. Not as big as full, but certainly way more than regular incrementals.