Introduction

ESXi 6.7 virtual machines rely heavily on VMDK files, which store all VM data. Accidental deletion of a VMDK can result in significant data loss, affecting both operational systems and critical business information. Understanding recovery methods, risks, and realistic outcomes is essential for system administrators. Jiwang Data Recovery specializes in recovering most critical VMDK files while keeping key VM data intact. www.sosit.com.cn

Problem Definition

Deleting a VMDK file removes the virtual disk from the datastore. Unlike removing a VM from inventory, this action eliminates the primary storage for a VM. Recovery is possible only if the underlying datastore sectors have not been overwritten. The probability of recovery diminishes with continued writes to the affected datastore.

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Engineer Analysis

VMDK recovery requires understanding VMFS storage structure and block allocation. Key points include:

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• Deleted VMDK sectors may still exist until overwritten by new data.
• SSD datastores complicate recovery due to TRIM and wear leveling.
• RAID or NAS storage introduces additional complexity, especially if partial failures occurred.
• Backups and snapshots dramatically improve recovery success.

Recovery involves scanning the datastore at the block level, reconstructing the virtual disk, and ensuring VMX configurations align with restored VMDK files.

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Common Causes of VMDK Deletion

• Accidental manual deletion through vSphere client or CLI.
• Scripts or automated cleanup processes removing inactive disks.
• Corrupted snapshots ing deletion of dependent VMDK files.
• Storage errors, including failed NAS or RAID operations.

Recovery Procedure

1. Immediately stop all writes to the datastore containing the deleted VMDK.
2. Create a block-level image of the datastore to prevent accidental overwrites.
3. Use VMFS-aware recovery software to scan for deleted VMDK sectors.
4. Reconstruct the VMDK file in isolated storage for validation.
5. the restored VMDK by attaching it to a test VM before reintegrating into production.

Jiwang Data Recovery emphasizes careful handling to maximize recovery probability while preserving remaining VM integrity.

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Case Studies

Case Study 1: Windows VM Deleted VMDK on SSD Datastore

• Steps Taken:
  1. Verified SSD datastore health.
  2. ped all writes immediately to prevent sector overwrites.
  3. Used professional recovery software to scan deleted VMDK sectors.
  4. Recovered virtual disk to isolated storage.
  5. Mounted VMDK on test VM and validated critical Windows system files.
• Expected Results: Most critical Windows data recovered; some unsaved or overwritten files could not be restored.
• Precautions: SSD TRIM prevented some blocks from being recoverable.

Case Study 2: Mac VM Deleted VMDK on NAS RAID

• Steps Taken:
  1. Created snapshot of RAID volume to protect remaining data.
  2. Performed low-level scan for deleted VMDK blocks.
  3. Reconstructed virtual disk in isolated storage.
  4. Verified VM boot functionality and recovered most user data.
  5. Reintegrated reconstructed VMDK into production environment.
• Expected Results: Key Mac VM data intact; minor files unrecoverable due to overwrites.
• Precautions: RAID rebuild postponed; recovery conducted on copied volume.

Cost & Success Rate

• SSD Datastore: $200–$400 per VM; 70–85% success rate for critical VMDK blocks.
• NAS or RAID Volumes: $350–$800; 60–80% recovery depending on RAID health and overwrites.
• External storage or backups: $100–$250; up to 95% if snapshots exist.

The probability of recovery failure increases if the datastore is heavily used after deletion. Early intervention greatly improves outcomes. 技王数据恢复

FAQ

1. Q: Can a deleted VMDK always be fully recovered? A: No, recovery success depends on whether data sectors are intact. Overwrites reduce probability.
2. Q: Which storage type has the highest recovery chance? A: NAS or SSD with minimal post-deletion writes and available snapshots.
3. Q: Is it safe to continue VM operations after VMDK deletion? A: No, writes can overwrite recoverable data; halt operations immediately.
4. Q: Are professional recovery tools necessary? A: Yes, manual attempts may corrupt remaining VMDK blocks.
5. Q: How long does VMDK recovery take? A: Hours to several days depending on datastore size and complexity.
6. Q: Can Jiwang Data Recovery guarantee recovery? A: While most critical data can be restored, absolute guarantees are impossible due to potential overwrites and storage conditions.

Conclusion

Recovering deleted VMDK files on ESXi 6.7 is possible if intervention is prompt and proper tools are used. Most critical virtual disks and key VM data can be restored, but some files may be unrecoverable if storage blocks were overwritten. Partnering with experts like Jiwang Data Recovery ensures careful handling, maximizing recovery success while preserving remaining VM integrity.

www.sosit.com.cn

www.sosit.com.cn