Recover corrupted or broken backups
TerveData provides technical analysis and recovery of damaged enterprise backup systems and storage repositories.
- >Broken backup chains (VBK / VIB / VBLOB)
- >Invalid restore points
- >Corrupted backup repositories (ZFS / XFS / NTFS)
- >Failed VM restores
- >Partial backup extraction
// common_failure_scenarios
Common failure scenarios
ERR_VBK_OPENVeeam "Unable to open backup file"
Backup file header corruption or incomplete write operations
ERR_RP_INVALIDRestore point marked invalid
Metadata inconsistency between restore point and actual data blocks
ERR_CHAIN_SEGMissing incremental chain segments
VIB files deleted, moved, or corrupted breaking the restore chain
ERR_REPO_CORRUPTRepository corruption after storage failure
Controller failure, power loss, or RAID rebuild errors affecting backup data
ERR_REFS_METAZFS / XFS fast-clone metadata issues
Block-cloning metadata corruption preventing file-level access
ERR_CHAIN_MIGBackup chain inconsistency after migration
Path changes, storage migration, or repository moves breaking chain references
// technical_recovery_process
Technical recovery process
Backup chain analysis
Analysis of VBK/VIB/VBLOB metadata structure, block mapping, and chain integrity verification
Corruption detection
Identification of corrupted blocks, missing restore points, and metadata inconsistencies
Chain reconstruction
Reconstruction of valid backup chains where possible using surviving data blocks
Data extraction
Extraction of recoverable VM disks, file-level data, and application-consistent snapshots
Recovery assessment
Estimation of recovery success probability and prioritized recovery options
// supported_environments
Supported environments
Backup Software
- +Veeam Backup & Replication
Hypervisors
- +VMware vSphere
- +Microsoft Hyper-V
File Systems
- +ZFS
- +XFS
- +NTFS
Repositories
- +Windows Server repositories
- +Linux-based backup repositories
// deliverables
What you receive
Recovery feasibility assessment
Detailed analysis of what data can be recovered and probability estimates
Technical root-cause analysis
Identification of failure origin and contributing factors
Extracted data
Recovered files, VM disks, and application data where possible
Prioritized recovery options
Ranked list of recovery approaches based on success probability and criticality
Full recovery attempt
Optional comprehensive recovery service for maximum data extraction
// recovery_cases
Example recovery cases
CASE-2026-023Repository size: 90TB+Storage controller failure
Scenario
Repository corruption after RAID controller failure
Outcome
Partial VM recovery achieved
Details
Multiple critical VMs extracted from damaged backup chain after storage controller firmware failure caused repository-wide corruption.
CASE-2026-012Repository size: 12TBIncremental chain break
Scenario
Broken incremental chain after snapshot mismatch
Outcome
Critical VMs restored
Details
VMware snapshot consolidation failure caused Veeam chain break. Reconstructed valid restore points for 15 production VMs.
CASE-2025-046Repository size: 45TBZFS metadata corruption
Scenario
ZFS dataset metadata failure
Outcome
File-level extraction completed
Details
Linux ZFS repository with corrupted metadata structures. Partial file-level extraction from affected backup files.
// request_analysis
Request recovery analysis
Describe your backup failure scenario. Include error messages, backup software version, and repository details if available.
TIP: Providing logs or error messages improves analysis speed.