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RAID Data Recovery
RAID Crash?

If you need RAID data recovery, we can help. We specialize in complex RAID arrays. RAID 0, RAID 1, RAID 5 and beyond. We can get your data back quickly.

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Case Studies

Case studies include information about actual recoveries completed within our lab. You may find similar symptoms to a problem you are having with your drive. Here are a couple of recent cases:

• 250GB Seagate Clicking
• 1TB Raid 0

Brands We Service

maxtor data recovery

seagate data recovery

western digital data recovery


beyond micro




fantom drives



**No Evaluation Fees / No Attempt Fees** Free evaluation and free external hard drive with every successfull recovery. You pay nothing unless your data is recoverable. Call now for a free quote: 1-800-717-8974.

Hard Disk Platters

A Western Digital Scorpio 2.5 inch drive with a scored platter.The platters of a hard drive actually hold your data. The image on the left illustrates what a platter looks like after it has been scored by a head crash.

The magnetic surface of each platter is divided into magnetic regions less than a micrometer in size. Each of these regions makes up a single binary unit of information. A binary region on a hard drive platter (as of 2006) is about 200-250 nanometers wide (within the radial direction of the platter) and extends about 25-30 nanometers in the down-track direction. This comes to about 100 billion bits (100 gigabits) per square inch of hard drive platter area. The materials which make up the magnetic layer are usually a cobalt-based alloy. Today, each of these magnetic regions within the hard drive is composed of a few hundred magnetic grains. It is these magnetic grains which become magnetized when data is written to the drive. It is possible that in the future, drive manufacturers may use different systems to create the magnetic regions.

The actual platter is most often made of aluminium or glass substrate. After the platter is machined, it is then coated using a vacuum deposition process called magnetron sputtering. Vacuum deposition is a wonder all on it's own, as this process deposits material, atom by atom or molecule by molecule onto a solid surface. The coating itself is comprised of mostly non-magnetic metallic alloys which is very complex in structure. There is also a protective coating that is carbon based and is applied in the same manner. Finally, a thin lubricant layer, approximately one nanometer is applied by dipping the platter into a solution. The platter is then allowed to cure and receives a final buff to remove any defects in the surface. A special sensor examines the platter surface for any remaining defects.

Platter surfaces have a mirror finish. Any contamination can render the contaminated area of the platter unreadable. The surface of the platter is especially succeptible to finger prints with even the slightest touch. That is why careful handling of a hard drive is critical during the recovery process, and all recovery work must be completed in a clean room environment.

When a hard drive suffers a physical failure, such as a head crash, the platters can sometimes become scored due to the head coming in contact with the platter and grinding the surface. In these cases it is rare that data will be recoverable. For more information, please call 1-800-717-8974.

You can easily see the deep groove cut into the platter by the failed read-write head.
Scored platter due to a hard drive crash. Notice the debris
radiating around the cut in the platter. This debris often
causes even more damage to the platter.

A closer look.

Even closer.


**No Evaluation Fees / No Attempt Fees** Call now for a free quote: 1-800-717-8974. For over a decade we have been dedicated to recovering data for clients across the globe.
Death Of A Hard Drive

Does Your Drive Sound Like This?

• Head Crash
• Bad Head
• Bad Head 2
• Bad Head 3
• Slow Spindle Motor
• Head Stuck To Platter

If your hard drive sounds like any of the above, it more than likely has suffered a physical failure. It is recommended you, power your system down immediatly! Just pull the plug if you have to, and do not reapply power to the drive. Call us at 1-800-717-8974 for more information about our services.

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Featured Videos

Head Swap and Data Recovery On A Western Digital Hard Drive

We take a Hitachi Travelstar into our clean room for a head swap.

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Contact Information

ACS Data Recovery
1005 Marlandwood Rd. Suite 117
Temple, TX 76502

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