Re: Unable to set chunk size

[Phil Turmel <philip@xxxxxxxxxx>]

On 05/10/2012 10:23 AM, Rajasekhar Pulluru wrote:
> Hi All,
> 
> I am unable to set chunk size for a raid5 device.
> # cat /sys/block/md0/md/chunk_size
> 1048576
> # echo 4194304 > /sys/block/md0/md/chunk_size
> # cat /sys/block/md0/md/chunk_size
> 1048576
> 
> What could be the problem?

That sysfs parameter is read-only.  You set the chunk size when you
create the array, or use "mdadm --grow" to reshape it.

HTH,

Phil
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