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As a test environment I will add 4 USB disks and use them as data drives for Swift.

The disks come partitioned and formatted, we'll change that.

I do not need partitions on the data disks, so I will force mkfs.xfs to ignore the partition table and format the raw disk insead:

$ sudo /sbin/mkfs.xfs -f -L data1 -l internal=1,lazy-count=1 -d agcount=4 -b size=4096 /dev/sdf
meta-data=/dev/sdf isize=256 agcount=4, agsize=183139584 blks
= sectsz=4096 attr=2, projid32bit=0
data = bsize=4096 blocks=732558336, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=357694, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0