Chain of Custody for Shipped Drives

When a customer ships a failed drive to a data recovery lab, the drive passes through multiple handling stages: packaging, carrier transport, intake, diagnosis, recovery work, data transfer, and return shipping. Each stage introduces physical risks (shock, vibration, static discharge, temperature extremes) and requires documentation to maintain a verifiable chain of custody. This article covers the practical requirements at each stage and explains why proper handling matters for recovery outcomes.

Packaging Requirements for Shipping a Failed Drive

A failed hard drive is more vulnerable to shipping damage than a working drive. Drives with degraded heads may have heads resting on the platter surface (stiction). Drives with loose internal components (broken head arm, dislodged filter) can sustain additional damage from vibration and impact during transit. Proper packaging minimizes these risks.

SSDs are less sensitive to physical shock than HDDs (no moving parts, no platter surfaces), but they still require antistatic protection. NVMe M.2 drives are particularly vulnerable to physical damage during shipping because they are small, thin PCBs that can flex and crack if not properly cushioned.

Intake Documentation and Labeling

When a drive arrives at the lab, intake documentation creates the formal chain of custody record. The intake process typically includes:

1. Package condition inspection. Note any visible damage to the shipping box (crushed corners, wet spots, punctures). If the package is damaged, photograph it before opening. This documentation is relevant if an insurance claim is needed.
2. Drive identification. Record the drive's manufacturer, model number, serial number, firmware revision, and capacity from the drive label. Photograph the label. This information uniquely identifies the drive and prevents mix-ups in a lab handling multiple cases simultaneously.
3. Physical condition assessment. Note any visible damage to the drive itself: dents, scratches, broken connectors, signs of liquid exposure, missing screws (which may indicate the drive was previously opened). Record whether the drive was received in an antistatic bag.
4. Case assignment. The drive is assigned a unique case number that follows it through every stage of the recovery process. All work performed, notes, and results are logged under this case number.
5. Secure storage. After intake, the drive is stored in a designated area with access limited to recovery technicians. Drives are not left on open benches or in unsecured areas.

Handling During the Recovery Process

During active recovery work, the drive may go through multiple stages: initial diagnosis, physical repair (head swap, PCB work), firmware repair, and imaging. Each stage is documented with what was done and what was found.

Key handling practices during recovery:

• ESD precautions. Technicians wear grounding straps when handling exposed PCBs. Antistatic mats are used on workbenches. The PCB is the most ESD-sensitive component of a hard drive.
• Clean environment for open-drive work. Any procedure that requires opening the drive (head swap, platter inspection) is performed in a laminar flow bench with HEPA or ULPA filtration.
• No unnecessary disassembly. Drives are not opened unless the diagnosis indicates a mechanical problem requiring internal access. If the failure is firmware-level (accessible through PC-3000 without opening the drive), the drive stays sealed.
• Original components preserved. If parts are removed (original HSA, original PCB), they are stored with the case file. The patient drive's original parts are returned with the drive unless the customer specifies otherwise.

Data Transfer and Verification

After successful imaging, the recovered data is transferred to the return media (typically a new external hard drive or SSD provided by the lab). The transfer process includes:

• File listing generation. A complete file and folder listing is generated from the recovered image. This listing is provided to the customer for verification before the return media is shipped.
• Data integrity verification. The transferred files are spot-checked for readability. Critical file types (databases, PST files, virtual machine images) are verified to open correctly.
• Customer approval. The customer reviews the file listing and approves the recovery before the return media is shipped. This step confirms that the recovered data matches the customer's expectations and that no critical files are missing.

What Happens to the Original Drive After Recovery

After recovery is complete and the customer confirms receiving the recovered data, the lab handles the original drive according to the customer's instructions:

Return to customer (default)

The original drive is returned via insured shipping. Customers should not reuse the drive for storage, as the failure that caused data loss may recur. The drive may be kept as a backup reference or disposed of by the customer.

Secure destruction

If the customer requests it, the lab can securely destroy the drive. For HDDs, this typically involves degaussing (exposing the platters to a strong magnetic field that erases all magnetic data) or physical destruction (shredding). For SSDs, physical destruction is the only reliable method because degaussing does not affect NAND flash. Documentation of destruction is provided.

Data purge from lab systems

The recovered data image stored on the lab's imaging workstation is deleted after the customer confirms receipt of the return media. Labs do not retain customer data indefinitely. The retention period (typically 7-30 days after confirmation) is defined in the lab's terms of service.

Frequently Asked Questions