Linked by Thom Holwerda on Fri 18th Sep 2009 13:40 UTC, submitted by Robert Escue
Hardware, Embedded Systems This is an article which discusses the increase in storage capacity while performance and hard error rates have not improved significantly in years, and what this means for protecting data in large storage systems. "The concept of parity-based RAID (levels 3, 5 and 6) is now pretty old in technological terms, and the technology's limitations will become pretty clear in the not-too-distant future " and are probably obvious to some users already. In my opinion, RAID-6 is a reliability Band Aid for RAID-5, and going from one parity drive to two is simply delaying the inevitable."
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Robert Escue
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Is it? I can't think of too many companies that are betting the farm on SATA storage in terms of performance or reliability. How are 7,200 RPM SATA disks going to compare to a 4 GB Fibre Channel array using 15,000 RPM disks, there not. SATA only beats FC in terms of capacity and cost.

SSD's are also immature technology that is only beginning to be integrated into devices like Sun's Unified Storage System 7000 series arrays, and even then they are being used as cache, not primary storage. While this might not be the case in five to ten years, SSD's are not quite ready for prime time data center use just yet.

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