Ask a Disaster Recovery Specialist
By June Campbell
What would happen to your data if:
Data recovery specialists restored the lost data in all of the above situations. Fire, flood, and road rage is all in a day's work for these knights of the byte.
Michael Peltier is the Senior Data Recovery Engineer for Data Recovery and Reconstruction in Tucson, Arizona. He has stories to tell and suggestions to offer.
About a Drive Unit
But first, some background. Drive units contain read/write heads that transmit data to recording platters. The head flies above the platter, separated by a painfully thin cushion of air.
Measured in microns, the thickness of a human fingerprint is many times higher than the head's flying height. If the head makes direct contact with the recording platter, particles are knocked off the head and the platter and are caught in the air cushion where they grind off the platter's recording media. The drive can corrupt in as little as fifteen minutes or it could take several days.
Peltier reminisced about the customer who applied "a few drops of oil" inside the drive enclosure because the motor wasn't turning. The enclosure was saturated with oil and the oil prevented the head from flying. The recording surface was ground clean. "A few drops! He should have added a dipstick!" Peltier said.
Then there was the time he discovered a family of ants had taken up residence in a drive enclosure.
Causes of Damage
However, obsolescence is the typical culprit. All drives will fail eventually, but a mixed bag of conditions causes premature drive failures -- heat, water, impact, power interruptions, viruses or environmental contaminants.
While fire can cause heat damage, overheated equipment is the most likely cause. If the ambient (i.e. room) temperature becomes too high, changes in air pressure will reduce the air cushion's thickness. The read/write head contacts the recording platter and corruption occurs.
Physical shocks or high vibration levels cause similar damage.
Environmental contamination usually occurs if the seal that goes around the drive is damaged. (Not all drives have these seals). With the seal damaged, particles in the air or cigarette smoke can find their way between the head and the platter where they will grind away the recording media.
Water damage occurs because contaminants in water are corrosive to the metals found inside the drive, causing microscopic pitting.
Power interruption also causes damage. Sudden power failure or lightning strike can cause the drive to lose RPMs (revolutions per minute). This causes air pressure to drop, which in turn reduces the head's flying height.Viruses can create havoc through software damage.
Peltier suggests the following practices will increase your chances of data recovery:
Large files are more at risk of corruption than smaller files. If possible, separate your work into smaller files.
File recovery cannot be guaranteed, but if conditions are right, much can be accomplished. Peltier once recovered 7566141f lost data from a reformatted hard drive. Deleted files or formatted drives leave "shadows" of data behind, and disaster recovery specialists can sometimes retrieve this data.
If you ever need a data recovery specialist, Peltier suggests that you look for a company or individual with experience, ask for references, find out the pricing policy in advance, and look for a "no data, no charge" policy. "If somebody is charging a diagnostic fee, there is a possibility that they will tell you that they are your best shot in getting the data recovered just to get the diagnostic fee. Without a diagnostic fee, you know they are working in your best interests."
And oh yes, did we mention do a backup?Interested in publishing this article in your ezine, website or print publication? This article is available for your use provided you include the info box below and use a live, DO FOLLOW link to this site.
How to Write Business Plans, Business Proposals, JV Contracts, More!
No-cost ebook "Beginners Guide to Ecommerce".
Business Writing by Nightcats Multimedia Productions