The erofs branch in make_filesystem() never passed the sector size to mkfs.erofs, so FileSystemSectorSize= was silently ignored for erofs partitions. mkfs.erofs defaults to the page size (e.g. 16K on aarch64), which is too large for some use cases such as UFS with 4K blocks. Pass -b <sector_size> to mkfs.erofs, but only when it is smaller than the page size, since mkfs.erofs defaults to the page size and rejects larger values. This matches how the other supported filesystems (xfs, ext4, btrfs, f2fs, vfat) already handle sector_size. Fixes #43238
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