Fix Corrupt VMFS Volumes Using DiskInternals VMFS Recovery A corrupt VMware Virtual Machine File System (VMFS) volume can bring an entire business infrastructure to a halt. When ESXi hosts lose access to datastores due to power outages, hardware failures, or metadata corruption, virtual machines become inaccessible. DiskInternals VMFS Recovery is a specialized software solution designed to bypass failed hypervisors and recover data directly from damaged storage media. Understanding VMFS Corruption
VMFS is a high-performance cluster file system designed for virtual machines. Because multiple ESXi hosts often access the same VMFS volume simultaneously, corruption can lead to severe data locking issues and broken file hierarchies. Common causes of VMFS corruption include:
Improper Shutdowns: Sudden host failures or power loss during write operations.
Storage Area Network (SAN) Issues: Faulty Fibre Channel, iSCSI, or SAS connections.
RAID Controller Failures: Corrupted cache or bad sectors on physical disks.
Accidental Deletion: Human error resulting in formatted volumes or deleted VMDK files. Key Features of DiskInternals VMFS Recovery
DiskInternals VMFS Recovery works independently of the VMware vSphere environment. It reads the raw storage sectors directly to reconstruct the original virtual machine structures.
Hypervisor-Independent Recovery: Works without requiring a running VMware ESXi host.
Automatic RAID Reconstruction: Reassembles broken RAID 0, 1, 5, 6, and JBOD configurations automatically.
Supports Large Drives: Safely processes storage volumes larger than 2 TB.
Multi-Version Compatibility: Supports VMFS versions 3, 5, and 6.
Virtual Disk Mounting: Mounts recovered VMDK files as local drives in Windows for easy file extraction. Step-by-Step Guide to Recovering Corrupt VMFS Volumes Step 1: Prepare the Recovery Environment
Do not install recovery software or perform write operations on the corrupted storage. Connect the physical hard drives, SAN, or iSCSI target containing the corrupt VMFS volume to a healthy Windows machine. Step 2: Initialize DiskInternals VMFS Recovery
Download and launch the application on your Windows system. The software will automatically trigger the built-in Recovery Wizard. If you are dealing with a broken RAID array, the program will attempt to reconstruct the array configuration at this stage. Step 3: Select the Target Drive
Locate the corrupted VMFS volume or the reconstructed RAID disk from the list of available drives. Select the drive and click Next. Step 4: Choose the Scanning Mode
Select Full Scan for deep analysis. This mode searches the raw disk sectors to find missing parameters, fragmented VMDK files, and lost directory structures. The process may take several hours depending on the storage size. Step 5: Preview and Verify VMDK Files
Once the scan concludes, navigate through the reconstructed virtual directory structure. DiskInternals provides a free preview feature. Double-click on the recovered .vmdk files or individual text files inside the virtual machine to verify that the data is intact before committing to a license purchase. Step 6: Export and Save Data
Select the required VMDK files or specific documents from within the virtual disks. Click the Save icon. Choose a secure, external storage destination that is separate from the corrupted drive to prevent data overwriting. Preventative Best Practices
To minimize future risks of VMFS data loss, implement the following safety measures:
Maintain updated, offsite backups using dedicated VM backup solutions.
Utilize Uninterruptible Power Supplies (UPS) for all hosts and storage arrays.
Monitor storage hardware health frequently using S.M.A.R.T. alerts.
If you want to ensure a smooth recovery process, please let me know:
The exact error message or behavior your ESXi host is showing.
The type of storage setup you are using (RAID level, SAN, local drives). The version of VMFS or ESXi you are running.
I can provide specific troubleshooting steps tailored to your infrastructure.
Leave a Reply