Production VM recovery for virtualization administrators is a different engagement shape from end-user recovery. The work requires a written failure narrative before drives ship, NDA coverage on the VM images themselves (not just the contract), and a documented chain of custody that survives a downstream compliance audit. If your compliance program mandates a vendor with specific regulatory certifications, confirm with your auditor before shipping; our process is appropriate for standard corporate confidentiality and most attorney engagements, but it is not a substitute for a certification you are contractually obligated to use.
RTO and RPO by Failure Class
These ranges assume a single failure domain. A simultaneous logical-plus-physical failure (head crash on one member of a RAID 5 with VMFS corruption on the surviving members) follows the slower of the two timelines because imaging must complete before metadata work begins.
| Failure Class | Typical RTO | RPO Boundary | Driver |
|---|
| VMFS metadata corruption (intact drives) | 2 to 4 business days | Last completed VMFS journal commit before crash | VMFS heartbeat region and resource fork parsing |
| Broken VMDK snapshot chain | 2 to 5 business days | Last consistent delta with valid CID lineage | Grain directory and CID/parentCID reconstruction |
| Hyper-V interrupted checkpoint merge | 3 to 6 business days | Last AVHDX delta with intact BAT | BAT replay and VMCX timestamp correlation |
| RAID 5/6 single mechanical failure | 5 to 8 business days | Same as healthy array at moment of degradation | Donor drive sourcing, sector-by-sector imaging |
| Multi-drive RAID failure or vSAN disk group loss | 7 to 14 business days | Subject to parity recoverability across surviving members | Multiple head swaps, cache SSD FTL repair via PC-3000 SSD |
| SAN shelf with simultaneous head crashes | 10 to 20 business days | Dependent on platter condition across affected members | Serial donor sourcing, controller metadata reconstruction |
Rush queueing moves a case ahead of standard work but cannot shorten the physical imaging clock. A 4 TB drive with head damage images at the read rate the surviving heads can sustain; there is no shortcut. +$100 rush fee to move to the front of the queue.
Chain of Custody and Cryptographic Erasure
Every drive that arrives at the Austin, TX lab is logged at receipt with shipping label imagery, serial number capture, and external photographs documenting physical condition. Each internal transfer between imaging station, clean bench, reconstruction workstation, and return shipment is recorded with timestamp, technician, and a SHA-256 hash of the image taken at that station.
After delivery is confirmed, the recovered image is retained on encrypted internal storage for the customer-specified hold window (commonly 7, 14, or 30 days). At the end of the hold the image is cryptographically erased by destroying the LUKS header bound to the case-specific volume key, and a destruction confirmation is appended to the engagement record.
The chain-of-custody log is provided with the recovered data. The log is sufficient for routine corporate compliance review and most legal hold engagements; it is not a forensic chain of custody appropriate for criminal evidence handling, which requires a separately scoped forensic engagement.
NDA Coverage for Sensitive VM Images
We sign mutual NDAs before drives leave the customer site. The NDA covers the contents of the VM images, not only the contractual relationship; engineers handling the images do so under the same NDA scope. Single-location, in-house policy means images are not transferred to partner facilities, off-shore engineers, or cloud analysis pipelines.
If the dataset includes sensitive material, brief us in writing before drives ship so handling can be scoped against the relevant data-handling requirements. Requests for baseline NDA templates or redlines can be routed to help@rossmanngroup.com.
We do not perform decryption work against customer encryption layers; recovery returns the data in the same encrypted state it left the source, with the file system intact and the customer-managed key still required for guest access.
Engineer Engagement Protocol
Production incidents are best opened with a written failure narrative covering hypervisor and version, host filesystem (VMFS5/6, ReFS, NTFS, ZFS, Btrfs), storage backend (direct-attached, SAS shelf, SAN LUN, NFS, iSCSI, vSAN, Ceph RBD), the sequence of events that preceded loss, and any actions taken since (rebuild attempts, consolidation retries, forced unmounts). Send the narrative before the drives. A single thirty-minute call before shipping prevents a multi-day reconstruction in the wrong direction.
For multi-host or cluster failures, include the shared-storage topology and the inventory of which drives came from which bay in which shelf; bay position is required for RAID reconstruction on controllers that do not embed member ordering in the on-disk metadata. For deeper context on the underlying RAID mechanics, see our RAID data recovery and server data recovery workflow pages.
Direct Engineer Access for VM Recoveries
VMware ESXi and Hyper-V customers speak to the engineer running the recovery, not a sales relay. The technician parsing the VMFS metadata, walking VMDK descriptor chains across snapshot deltas, or rebuilding a corrupted VHDX log is the same person on the call thread and email exchange. Status updates cite actual work performed: members imaged, snapshot generations linked, partition tables reconstructed, parity rotation detected. The written failure narrative described above goes to that engineer; nothing is filtered through an account manager.
