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Alternatives to RAID
This article is part of the Storage magazine issue of Vol. 9 Num. 3 May 2010
The various forms of RAID have been around for a long time and have done a good job of protecting data. But high-capacity drives and new performance demands have spurred development of RAID alternatives. Redundant array of independent disks (RAID) has been the standard for disk-based data protection since 1989, and is a proven and reliable method that's considered a basic data storage building block. Basic storage principles tend to change very slowly and, despite its popularity and track record, change is coming to RAID. To gain more insight into why an alternative to RAID might be appealing requires some understanding about RAID and the growing problems with the technology. RAID shortcomings in the 21st century The purpose of RAID is to protect data in the event a hard disk drive (HDD) fails. When that failure occurs, data from that failed HDD (or multiple HDDs) is recreated from parity or copied from a mirror, depending on the type of RAID in use. Disk drives are electro-mechanical devices that have the highest probability of...
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Features in this issue
The outlook for data storage managers in 2010 is a little brighter according to our Storage Purchasing Intentions survey. Find out what technologies respondents are looking at.
Solid state is emerging as a viable enterprise storage alternative, but there's lots of life left in hard disk drives, with higher capacity, greener and more capable drives coming.
RAID has been around for a long time and done a good job of protecting data. But high-capacity drives and new performance demands have spurred development of RAID alternatives.
In our survey, 50% of respondents use a tiered system in their storage shops, about the same as last year. But more automated methods are being used to move data from tier to tier.
Columns in this issue
The deep freeze in IT spending is starting to thaw and IT organizations are shifting from cost-reduction mode to cost containment.
The world of file content and NAS storage is disjointed and fraught with error; we need to unravel the problem of massive file stores before the issue gets too big to handle.
A storage vendor may have a great technology, but the bottom line is how fit it is for survival in the marketplace. So put down that spec sheet and pick up the business section.