In older VirtualBox manuals (at least up to v5.0.0) "showhdinfo" is being mentioned as subcommand for vboxmanage.
The recent manual (v6.1.30) as well as "vboxmanage -h" don't mention "showhdinfo" any more.
Instead, "showmediuminfo disk" is suggested to get details about distinct virtual hdds.
Even vboxmanage included in VirtualBox 6.1.30 supports "showhdinfo", e.g. when called from older wrapper scripts.
I wonder whether this support ends sometime in future releases and whether there's an official deprecation message available.
Thanks in advance