I was decommissioning a Linux server and accidentally deleted both a data folder and its supposed backup folder using terminal commands. The data was stored on an Azure-mounted filesystem. I stopped making changes immediately and contacted the team responsible for the Azure storage and mount configuration. They checked the available snapshots and recovery options but reported that the deleted files could not be recovered.
Are there any remaining possibilities, such as filesystem-level recovery, hidden Azure backup mechanisms, recovery from the underlying storage, or offline forensic tools? I am not yet certain whether the mount is backed by Azure Files or another Azure storage service. I can provide non-sensitive details about the mount type, filesystem, and storage configuration if needed.
3 Answers
This incident also suggests that the backup was reachable from the same shell and could be deleted by the same account. A proper backup should have separate retention, access controls, or immutability so that a mistake on the source cannot remove every copy. Snapshots can help with short-term rollback, but they should not be treated as the only backup unless their retention and deletion protections are well understood.
If the mount is backed by a directly attached disk or a block device, stop all writes, unmount it, preserve an image, and work only from a read-only copy. A qualified data-recovery specialist could then examine the image with filesystem-specific tools for ext4, XFS, or whatever filesystem is actually in use. Do not run repair or recovery commands against the original volume first, since they may overwrite recoverable metadata.
For Azure Files or another remote file service, this approach generally is not available because you cannot obtain the raw storage image. In that case, check storage-account recovery features, share snapshots, soft delete, backup vaults, replication targets, and any independent backup system.
The first step is to identify exactly what is mounted. Check the mount details with commands such as `findmnt`, `mount`, `df -T`, and `lsblk` where applicable. The result will show whether this is Azure Files over SMB or NFS, a managed disk, or another storage service. Recovery options differ significantly between those types.
If it is a network-mounted Azure service, traditional Linux undelete tools usually cannot recover the files because the Linux host does not contain the underlying disk blocks. You would need a provider-side snapshot, backup, soft-delete feature, or another copy of the data.
That is the key distinction: a second directory on the same mounted storage is not an independent backup. Before concluding that everything is gone, verify whether another system, backup server, replication site, or retained snapshot contains an older copy.