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RAID's Days May Be Numbered

Sep 18, 2009, 10:36 (0 Talkback[s])
(Other stories by Henry Newman)

[ Thanks to Paul Shread for this link. ]

"The bottom line is this: Disk density has increased far more than performance and hard error rates haven't changed much, creating much greater RAID rebuild times and a much higher risk of data loss. In short, it's a scenario that will eventually require a solution, if not a whole new way of storing and protecting data.

"We'll start with a short history of RAID, or at least the last 15 years of it, and then discuss the problems in greater detail and offer some possible solutions.

"Some of the first RAID systems I worked on used RAID-5 and 4GB drives. These drives ran at a peak of 9 MB/sec. This, of course, was not the first RAID system, but 1994 is a good baseline year. You'll need to click on the image below for how the RAID rebuild picture has changed in the last 15 years."

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