984261@deltree

looks like CentOS 7.9 is using lsblk from util-linux 2.23.2  until util-linux v2.27 [util-linux v2.27 Release Note](https://github.com/util-linux/util-linux/blob/stable/v2.27/Documentation/releases/v2.27-ReleaseNotes) the --json was added to lsblk by Karel Zak it is an...

yeah, that's definitely.