On Wed, 2 Feb 2011 21:21:20 +0700 hansbkk@xxxxxxxxx wrote: > On Wed, Feb 2, 2011 at 6:36 AM, Roman Mamedov <rm@xxxxxxxxxx> wrote: > > > >> I have a RAID5 setup with 15 drives. > > > > Looks like you got the problem you were so desperately asking for, with > > this crazy setup. :( > > Please give some more details as to what's so crazy about this. > > I would think RAID6 would have made more sense, possibly with an > additional spare if these are large drives (over a few hundred GB?) Exactly, RAID6 would make an order of magnitude more sense. A 15-drive RAID5 array is just one step (one drive failure) from becoming a 14-drive RAID0 array (reliability-wise). Would you also ask "what's wrong with having a 14-drive RAID0"? See the link below for some array failure probability calculations: http://louwrentius.com/blog/2010/08/raid-5-vs-raid-6-or-do-you-care-about-your-data/ -- With respect, Roman
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