On Fri, Feb 17, 2006 at 03:14:37PM +0000, Gordon Henderson wrote: > Still scratching my head, trying to work out if raid-10 can withstand > (any) 2 disks of failure though, although after reading md(4) a few times > now, I'm begining to think it can't (unless you are lucky!) So maybe I'll > just stick with Raid-6 as I know that!
RAID-10 cannot survive the failure of *any* two disks as if two disks in one of the mirrors died then the whole mirror would be lost which loses you a segment of the upper stripe. *If* a second disk dies, then with 4 didks total you have 50% chance of it being the one you're relying on. If you require to withstand the loss of *any* two disks then you need RAID-6. -- http://strugglers.net/wiki/Xen_hosting -- A Xen VPS hosting hobby Encrypted mail welcome - keyid 0x604DE5DB
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