Keld Jørn Simonsen put forth on 2/16/2011 6:00 PM: > On Wed, Feb 16, 2011 at 05:32:58PM -0600, Stan Hoeppner wrote: >> David Brown put forth on 2/15/2011 7:39 AM: >> >> RAID level space/cost efficiency from a TCO standpoint is largely irrelevant >> today due to the low price of mech drives. Using the SATABeast as an example, >> the cost per TB of a 20TB RAID 10 is roughly $1600/TB and a 20TB RAID 6 is about >> $1200/TB. Given all the advantages of RAID 10 over RAID 6 the 33% premium is >> more than worth it. > > I assume that you with 20 TB mean the payload space in both places, that > is for the Linux MD RAID10 you actually have 40 TB of raw disk space. > With the Linux MD raid10 solution you furthermore can enjoy an almost > double up of the IO reading speed, involving 20 * 2 TB spindles compared > to 12 * 2 TB spindles. Enterprise solutions don't use Linux mdraid. The RAID function is built into the SAN controller. My TCO figures were based on a single controller SATABeast, 42x1TB drives in the RAID 10, and 24x1TB drives in the RAID 6, each configuration including two spares. -- Stan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
