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4.4. mkfs - Stripe Alignment

Aligning file data I/Os on stripe width boundaries can significantly improve performance on large RAIDs
To create a filesystem with a stripe unit of 1MB for an 8+1 RAID you would use:
mkfs.xfs -d sunit=2048,swidth=16384 device
or
mkfs.xfs -d su=1m,sw=8m device

Note

xfsprogs 3.1.0 and newer will use the blkid library to correctly identify stripe geometry for lvm, md, and some hardware raid devices which export this information