Output of mkfs.xfs su/sw values don't match the command line su/sw values

[Brian Davis <bridavis@xxxxxxxxxxx>]

Hi,

I have a 3Ware 7506-4LP card running RAID 5 across 3 x 300GB disks and 
64KB stripe size with an xfs fs.  I setup xfs like so:

localhost ~ # mkfs.xfs -f -d sunit=128,swidth=256 /dev/sda1
meta-data=/dev/sda1              isize=256    agcount=32, agsize=4578992 
blks
        =                       sectsz=512   attr=0
data     =                       bsize=4096   blocks=146527744, imaxpct=25
        =                       sunit=16     swidth=32 blks, unwritten=1
naming   =version 2              bsize=4096 
log      =internal log           bsize=4096   blocks=32768, version=1
        =                       sectsz=512   sunit=0 blks
realtime =none                   extsz=65536  blocks=0, rtextents=0

Why does the output display the sunit=16 and swidth=32 when I wanted it 
configured with 128 and 256 respectively? It looks like the output is 
displaying the fs block size (4096) rather than 512 blocks specified on 
the command line and the man page.

Is this correct? Can someone confirm that the sunit and swidth are set 
correctly for my array setting?

Thanks!