All, I'm creating a 30TB xfs filesystem that I want to ensure can grow to 120TB via xfs_grow. This is a pure SSD environment (Using 30TB Micron 6500 ION drives -- https://www.mouser.com/ProductDetail/Micron/MTFDKCC30T7TGR-1BK1DFCYY?qs=ulEa...) so I don't need to worry about RAID layout etc. I'm am worried about setting the AGcount and AGsize settings in mkfs.xfs By default, I get 29 for AGcount and the corresponding AGsize of ~1TB. Supposedly neither are adjustable, but that can't be true during xfs_grow. My (uninformed) guess is that if I quadruple the size of my xfs filesystem (from 30TB to 120TB), then the number of aggregation groups will also quadruple. Do I have that right? Or do I need to be careful in laying out my original aggregation group layout. Thanks, Greg -- Greg Freemyer Advances are made by answering questions. Discoveries are made by questioning answers. — Bernard Haisch