Problem category
NAS
Access, storage, and services.
Synology Hyper Backup Insufficient Destination Quota
Inspect retained versions and destination usage before choosing a capacity or retention procedure, without deleting recovery points as a diagnostic test.
Synology Hyper Backup Restore Only After an Integrity Check
Confirm the integrity-check finding, preserve recovery options, and identify the evidence needed for a destination-specific recovery plan.
Synology Hyper Backup Destination Offline over Tailscale
Separate the Tailscale path from the Hyper Backup Vault service when a remote Synology destination over Tailscale cannot connect. Test from the source NAS, then the exact address, service port, and DSM 7 outbound access.
Synology Hyper Backup Taking Longer Than Expected
Check task state, logs, NAS resources, and destination-specific signals when Hyper Backup is still running without a confirmed error.
Synology Hyper Backup Task Suspended After Interruption
Distinguish a resumable interruption from cancellation, identify the interruption context, and preserve the right backup-version expectations.
Synology Tailscale Connected but NAS Is Unreachable
Separate tailnet connectivity, name resolution, the tailnet access policy, DSM firewall rules, and the exact Synology service port before changing the NAS.
Synology Tailscale Subnet Router: LAN Device Unreachable
NAS access works, but a LAN service behind it does not. Separate subnet advertisement, CIDR, approval, access policy, client routing and target-side evidence.
TrueNAS SCALE SMB Share Exists but Client Access Is Denied
Confirm the share is reachable and the client authenticates as a Samba-enabled user, then separate the share ACL, the dataset (filesystem) ACL, the parent Traverse permission, and the share read-only and enumeration settings before any ACL change.
Unraid Array Will Not Start
Match the exact Main Array Operation message first, then separate missing disks, device-limit, license, key-server, and withdrawn-release branches before any array, disk, or license change.