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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8x 300$ 300GB SAS drives = 2400$ for 2TB Raid setup
3x 80$ 1TB SATA drives = 240$ for a 2TB Raid setup

So you basically still have to work out your solution to meet a specific projects needs between speed, security etc. I could double the # of SATA drives for RAID 10 and still be waaaaay under the cost of the SAS solution. Might not even need another box to hold the drives. I think array performance is a bigger factor when making a decision because the cost to be overly redundant with SATA is still waaaay cheap.

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