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The Human Factor: From accidentally deleting files to accidentally exposing the hardware to foreign substances, like coffee, accidents happen. Even efforts to back-up data can fail because they weren’t set-up properly (and tested), or they weren’t backed-up recently. We are, after all, only human and lost data happens.
The Inhumane Factor: A disgruntled employee can be very malicious. Note: Cherry Systems’ forensic team may also be helpful in these situations.
Software Corruption: In a typical week, a person writes or rewrites 100MB of data, which is 800,000,000 bits. When you consider that amount data being written to your hard drive every week, you can imagine a few being written incompletely or incorrectly. While the software is designed to self-correct some errors, the software has its limits.
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SOx Compliance (Sarbanes Oxley federal regulations): The need for increased security and confidentiality has led to corporate-wide data encryption. This corporate encryption and un-encryption can cause failures between the OS and controller, rendering lost data.
Contamination: Including that from fire and natural disasters: Smoke particles, minerals and particles in water, and debris from falling items can all contaminate the space between the read/write heads and the platter, or cause the heads to become misaligned.
Hardware Failure: The platters spin at extremely high speeds, some at 10,000 rpm, which is 600,000 revolutions per hour or 18 million revolutions per month if only turned on one hour per day. Or 1 billion times per year if turned on four hours per day. Hard drive manufacturers are very, very good; yet they're not perfect and lost data does occur.