Storage expert warns of short life span for burned CDs
And don't count on hard disk drives for long-term storage, either
Computerworld - Although opinions vary on how to preserve data on digital storage media, such as optical CDs and DVDs, Kurt Gerecke, a physicist and storage expert at IBM Deutschland GmbH, takes this view: If you want to avoid having to burn new CDs every few years, use magnetic tapes to store all your pictures, videos and songs for a lifetime.
"Unlike pressed original CDs, burned CDs have a relatively short life span of between two to five years, depending on the quality of the CD," Gerecke said in an interview this week. "There are a few things you can do to extend the life of a burned CD, like keeping the disc in a cool, dark space, but not a whole lot more."
The problem is material degradation. Optical discs commonly used for burning, such as CD-R and CD-RW, have a recording surface consisting of a layer of dye that can be modified by heat to store data. The degradation process can result in the data "shifting" on the surface and thus becoming unreadable to the laser beam.
"Many of the cheap burnable CDs available at discount stores have a life span of around two years," Gerecke said. "Some of the better-quality discs offer a longer life span, of a maximum of five years."
Distinguishing high-quality burnable CDs from low-quality discs is difficult, he said, because few vendors use life span as a selling point.
Hard-drive disks also have their limitations, according to Gerecke. The problem with hard drives, he said, is not so much the disk itself as it is the disk bearing, which has a positioning function similar to a ball bearing. "If the hard drive uses an inexpensive disk bearing, that bearing will wear out faster than a more expensive one," he said. His recommendation: a hard-drive disk with 7,200 revolutions per minute.
To overcome the preservation limitations of burnable CDs, Gerecke suggests using magnetic tapes, which, he claims, can have a life span of 30 to 100 years, depending on their quality. "Even if magnetic tapes are also subject to degradation, they're still the superior storage media," he said.
But he's quick to point out that no storage medium lasts forever and, consequently, consumers and business alike need to have a plan for migrating to new storage technologies.
"Companies, in particular, need to be constantly looking at new storage technologies and have an archiving strategy that allows them to automatically migrate to new technologies," he said. "Otherwise, they're going to wind up in a dead end. And for those sitting on terabytes of crucial data,that could be a colossal problem."
Related Blog: CDs, Lies, and Magnetic Tapes
Read more about Data Storage in Computerworld's Data Storage Topic Center.
- Silicon Valley's 19 Coolest Places to Work
- Is Windows 8 Development Worth the Trouble?
- 8 Books Every IT Leader Should Read This Year
- 10 Hot Hadoop Startups to Watch
- Slideshow: 7 security mistakes people make with their mobile device
- iOS vs. Android: Which is more secure?
- 11 sure signs you've been hacked
- Data Warehouse Augmentation: The Queryable Data Store While organizations have, to date, been busy exploring and experimenting, they are now beginning to focus on using big data technologies to solve...
- Rebranded Quadmark revamps its IT solutions with Google Apps Switching to Google Apps halved Quadmark's IT admin costs while achieving 10% time savings per employee. The global consulting firm now spends 80%...
- CrashPlan PROe Security Because mobile laptops often are connected to unsecured networks, a very high standard of security is required to ensure privacy.
- Protecting Digitalized Assets in Healthcare Healthcare providers face an urgent, internal battle every day: security and compliance versus productivity and service. For most healthcare organizations, the fight is...
- Live Webcast LIVE EVENT: 5/7, The End of Data Protection As We Know It. Introducing a Next Generation Data Protection Architecture. Traditional backup is going away, but where does this leave end-users?
- LIVE EVENT: 5/7, The End of Data Protection As We Know It. Introducing a Next Generation Data Protection Architecture. Traditional backup is going away, but where does this leave end-users?
- Make or Break: New Auto Products Must Go To Market On Time This Webcast quantifies the value of time to market for the auto industry and highlights how Primavera Enterprise Portfolio Management can help organizations. All Data Storage White Papers | Webcasts