On Sat, Oct 31, 2009 at 1:59 PM, Christian Pernegger <pernegger@xxxxxxxxx> wrote: >> md0 : active raid6 sda4[0] sdc4[5] sdd4[4] sdb4[6] >> 613409536 blocks super 1.1 level 6, 64k chunk, algorithm 2 [4/4] [UUUU] > > Why would you use a 4 disk raid6? If 50% of raw capacity is enough > just go with raid10 With 4 disks, the ability to sustain *any two* devices going bad is a big bonus. Using raid10 with two copies (1 original, 1 duplicate) on 4 disks gives me 50% space but I can only sustain *1* failed device. I'm guessing I'd have to go with raid10 with three copies (1 original, 2 duplicate) which is even worse (2/3 space lost). Did I just calculate that all wrong? -- Jon -- 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
