✅ Checklist

• I have searched open and closed issues for duplicates.
• This is a problem observed when managing a Data Safe Haven.
• I can reproduce this with the latest version.
• I have read through the documentation.
• This isn't an open-ended question (open a discussion if it is).

💻 System information

• Operating System:
• Data Safe Haven version: 5.0.1

📦 Packages

Paste list of packages here

🚫 Describe the problem

Backup not functional, workaround in docs doesn't work.

A major problem here is, the storage account types we have chosen (for good reasons of performance, ability to upload/download to/from) are not compatible with Azure backup services.

🚂 Workarounds or solutions

Because of the incompatibility, I think our two options are

1. Change the type of storage accounts we use to ones which are compatible
   • This will mean we loose nice features like performance, nice integration with NFS, upload/download using Azure storage explorer
   • Quite a significant infrastructure change to make
2. Implement our own backup
   • Requires writing/supporting our own solution
   • There are off-the-shelf tools we could use (I think Borg/Borgmatic)
   • Should be fairly simple to implement with a VM or container, as we can mount all of our storage as NFS
   • I have a proposal for how this would look using Borg/Borgmatic in the comments below