On Thu, Sep 24, 2009 at 03:48:35PM +1000, Nathan Norton wrote:
> I am trying to create a 10 drive raid6 array. OS is Centos 5.3 (64 Bit)
>
> All 10 drives are 2T in size.
> Disk /dev/sda: 2000.3 GB, 2000398934016 bytes
> mdadm: size set to 1953511936K
> Continue creating array?
>
> As you can see mdadm sets the size to 1.9T. Looking around there
But later...
> # mdadm --detail /dev/md3
> /dev/md3:
> Version : 0.90
> Creation Time : Thu Sep 24 23:48:32 2009
> Raid Level : raid6
> Array Size : 15628095488 (14904.11 GiB 16003.17 GB)
That's a little bit bigger than 2T :-) Indeed, it looks around right.
Assuming all disks are the same size, then to a first approximation
you would have this much space in your raid6:
8*2000398934016/1024 = 15628116672 KiB
mdadm reports 15628095488
I think the difference falls within expected limits.
> Anyone got any ideas?
The "create" line may have reported a small value (it reported the size
of each disk), but the final array looks nice and big.
--
rgds
Stephen
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