Mud-Caked Drives Yield Water, Dirt, And Data
On June 12, 2008, Cedar Rapids School District Print Shop was given four short hours to prepare for the impending flood of water heading in their direction. With the deadline looming, shop supervisor Robin Rieke was instructed to “put anything of value on top of furniture that was at least three feet off the floor and evacuate everyone from the building.” For extra safety, she placed all the shop’s computers on surfaces five feet and above.
Surely you can already guess what happens next.
The floodwaters rushed into the building and destroyed the print shop. The water level was more than double what was expected and crested at seven and a half feet, submerging everything under water including all the print shop’s computers that contained vital data for the survival of the shop.
Surveying The Damage
Rieke arrived on the scene a day later, against the recommendation of local officials, and immediately searched for the hard drives. The shop’s waterlogged drives stored documents from over 40 schools in the Cedar Rapids School District, including newsletter layouts, student handbooks, forms, curriculum, and more.
Rieke knew she had little time to recover her shop’s critical data and called DriveSavers, a professional data recovery service provider. According to company representatives, DriveSavers specializes in recovering data from hard drive problems like media damage, directory corruption, and virus attacks, as well as severely traumatized storage devices that have been submerged in water, fire-damaged and more.
Hopefully you're protecting yourself with regular backups and virus scans. But what happens when catastrophic failure craters a drive with irreplaceable data on it (if you missed Tom's Guide's CES 2009 coverage of an external drive being submerged and burnt, check it out here)?
The Start Of A Long Process
When Reike’s three mud-caked drives arrived at DriveSavers, it was clear they had suffered severe trauma. Their external cases were immediately cleaned and disinfected in the receiving department before delivery to a special clean zone for disassembly. DriveSavers notes that data recovery software of any kind should never be used on hard drives that have been traumatized or on drives where data is critical. They recommend that off-the-shelf data recovery software and other disk utilities be used with extreme caution and only when a clone or disk image of the hard drive has been obtained first.
The company also says it frequently receives drives that are pronounced unrecoverable due to severe media damage (which it says can be caused by attempts at using data recovery software). It is recommended that anyone experiencing the loss of irreplaceable, one-of-a-kind data should seek the assistance of a professional data recovery service.
A Closer Look
Recoveries from water-damaged storage devices are extremely complex for several reasons. Despite popular belief, hard disk mechanisms are not sealed. They often have breather holes, which allow air to enter the mechanism and compensate for altitude changes.
Note the small hole in the top cover. Water and other contaminants can seep into the mechanism, causing spots on the platter surfaces.
Behind The Scenes
Once the drives are disinfected, they are taken to a cleanroom, which, at DriveSavers, includes three separate ISO certified zones: ISO 5 (Class 100), ISO 6 (Class 1000), and ISO 7 (Class 10,000). DriveSavers says it has an inventory of over 20,000 parts and drives stored in an ISO 8 (Class 100,000) clean zone, which are used to swap in and out of drives in the recovery process. For more information on cleanroom standards, check out this link.
Cleanrooms are dust-free environments that maximize recovery results. Even the tiniest airborne particles can collect on open hard drives and cause read-write heads to malfunction. If the read-write heads damage the drive platters, valuable data could be lost forever.
Cleaning Up A Mess
During disassembly and cleaning in DriveSavers' ISO certified cleanroom, rust was found already building up inside the drive’s external enclosure.
Zooming In On Damage
A closer look at the circuit board reveals rust on the drive’s metal surfaces, after only a few days out of water.
A Little Latent Water
After removing the drive’s printed circuit board, more water was found underneath the protective foam padding.
Worst Fears, Confirmed
Here's where things get nasty. A large amount of moisture found its way into the drive mechanism.
A Race Against Time
The platters need to be removed and professionally cleaned to prevent hard water spots from forming. Hard water spots can develop on platter surfaces if platters are left to dry out. The spots are difficult to remove and make recovery nearly impossible.