Andy Smith <[EMAIL PROTECTED]> wrote: > On Wed, Dec 21, 2005 at 12:55:47PM +1100, Christopher Smith wrote: > > Why would you use RAID6 and not RAID10 with four disks ? > > I was wondering the same thing. It's true that RAID6 is guaranteed > to still run degraded after losing 2 devices, whereas a RAID10 on 4 > devices could only lose 1 device from each RAID1. So there is some > small extra redundancy there.
That's the reason - better reliability. With 4-disk RAID-10, a 2-disk failure has a 1/3 chance of causing array failure. With RAID-6, there is no chance. > But how does the performance for read and write compare? Good question! I'll post some performance numbers of the RAID-6 configuration when I have it up and running. -- Sebastian Kuzminsky - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
