Many people have a box in the attic in which they keep items that are precious to them. Unique and irreplaceable objects, collected throughout a lifetime: wedding photographs, sports trophies, academic certificates, the book a grandmother gave them, clippings of past triumphs covered in the local paper. A box in the attic is a low maintenance and stable archive for objects that, although one might not need to look at everyday, would be devastating to lose.
Many companies have data that is, in more practical terms, just as precious to them: customer records, original contracts, emails with suppliers, employee pension documents.
Instead of, figuratively, tucking this important data away in a box in the attic, many companies leave it scattered around their house: in their SAN, on application servers, personal laptops, and on backup tapes sitting in a filing cabinet. Although a company may not care as deeply for their data as an individual cares for the book their grandmother gave them, it is time that they started caring just a little bit more.
There are many reasons why it is important for companies to be able to safely hold electronic records over a long time period. Clearly, it is bad practice to lose an employee’s pension record, or be unable to look over old but still current business contracts and their supporting email chains.
On top of bad practice, it is also quite likely to be illegal. Data protection legislation and a growing body of industry specific regulations bestow on companies the obligation to safely manage data archives for many years. Archived data needs to be quickly accessible for discovery, and must maintain its authenticity to ensure it hasn’t been altered.
Once data is no longer actively being used companies must decide if they need to keep it and for how long according to best practice, legal obligation and regulatory compliance.
If it is not needed, it should be deleted to free up space on their primary storage systems. However, if it is still required, companies are likely to want to move the data to a lower cost and lower maintenance archiving system.
The archiving systems commonly available today are based on three different technologies: hard disk drive, tape and optical.
Hard disk drive systems, for example, RAID storage, are a popular archiving choice for businesses as they are usually relatively easy to attach to a network, have fast access speeds and unit costs have fallen, making them relatively cheap to purchase.
However, as a spinning mechanical system, which needs to be powered at all times, these systems will eventually break and can cost a considerable amount to power and cool over their lifetime. Additionally, data is written to the magnetic disk can become unstable leading to data corruption over time. These physical traits demand that data stored on magnetic disk be protected through a secondary backup procedure, adding extra cost and administration.