http://go7cnxivpns4x2trczyaabxwnrz7bwlxjiverkc32o4mjd5npjukpqid.onion/blog/2024-02-22-shrinking-xfs-partition-on-lvm.html
I created it with mkfs.xfs without any extra options, just using the defaults. raspberrypi3:~ # xfs_info /mnt/data/
meta-data=/dev/mapper/icy_box-data isize=512 agcount=32, agsize=45785360 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=0
= reflink=1 bigtime=1 inobtcount=1
data = bsize=4096 blocks=1460908544, imaxpct=5
= ...