Data Recovery of 19TB After Power Failure on HGST RAID Array in Miami

A small business in Miami, Florida, faced a major crisis after a sudden power outage shut down its RAID system. The company relied on a 27TB HGST RAID array (model 0F12456MRKA100P32) to store business documents, databases, media files, virtual machines, and backups.

When power returned, the system would not boot. Nearly 19TB of essential data became inaccessible. With daily operations at risk, the business contacted WeRecoverData, a global leader in professional data recovery.

System Would Not Start After Power Returned

The outage struck without warning. After electricity was restored, the RAID array failed to initialize properly. The drives would not mount, virtual machines would not load, and the file system showed clear signs of corruption.

Internal IT staff attempted to bring the system back online. However, those efforts did not succeed. The team also recognized that forcing a rebuild could permanently damage the data.

Without a recent backup and with years of company data at stake, the business needed expert help immediately.

Power Failure and RAID Metadata Corruption

Power outages can severely disrupt RAID systems. In this case, the sudden shutdown corrupted the RAID controller metadata and damaged the file system structure.

Although the individual drives remained physically healthy, the RAID controller could no longer interpret how the data blocks were organized. Without accurate metadata, the system could not reconstruct the array correctly.

Because of this complexity, standard recovery attempts posed a serious risk. Professional RAID data recovery was the only safe option.

Secure Imaging and Manual RAID Reconstruction

When the RAID array arrived at the WeRecoverData lab, engineers began a full diagnostic evaluation.

First, they created sector-by-sector images of every drive in the array. This critical step protected the original disks and allowed all recovery work to proceed from safe copies.

Next, engineers manually rebuilt the RAID in a secure virtual environment. They analyzed and reconstructed:

Drive order
Stripe size
Parity rotation
RAID configuration parameters

This process required precision and experience. Even a small configuration error could corrupt files permanently.

Once engineers rebuilt the RAID structure correctly, they accessed the damaged volume and performed deep scans to locate and verify the data.

19TB of Business Data Successfully Recovered

After extensive reconstruction and validation, WeRecoverData recovered the full 19TB of data from the failed RAID array.

The restored data included:

Business-critical documents
Databases
Media and design files
Archived projects and backups
Virtual machine images

Engineers verified file integrity to ensure accuracy and usability. They then organized the recovered data and delivered it securely on external storage, ready for immediate deployment.

Business Operations Restored

For the Miami business, this recovery prevented a catastrophic loss. Instead of rebuilding years of work, the company resumed operations with its data intact.

This case highlights the risks that power outages pose to RAID systems. Even when drives remain healthy, corrupted metadata can bring entire arrays offline.

WeRecoverData specializes in RAID recovery and large-scale storage failures, including cases involving power outages, metadata corruption, and controller issues. From small arrays to enterprise systems, experienced engineers use advanced tools and proven methods to restore critical data.