sunit & swidth on RAID-1?

[mike dentifrice]

Hello,

I would like to know if it makes any sense to specify sunit & swidth
parameters as mount options to XFS filesystems sitting on a Linux
software RAID-1 array, as advertised here [1] or there [2].

I'm asking, because it seems that chunk_size does not matter in a RAID-1
context, nor do stripe units; or do they?

Any tip would be appreciated,

[1] http://www.socalsysadmin.com/2008/10/15/optimizing-xfs-on-raid-arrays/
[2] http://feedblog.org/2008/06/18/howto-configure-raid-strides-in-xfs/

-- 
mike dentifrice <fluor at poivron.org>