Bug#781604: `journalctl /dev/sda` shows empty log

Tue Mar 31 15:08:25 BST 2015

Package: systemd
Version: 215-12
Severity: serious

`man journalctl` says:

Show all logs of the kernel device node /dev/sda:

           journalctl /dev/sda

But:

debian # journalctl /dev/sda
-- Logs begin at Tue 2015-03-31 11:57:43 BST, end at Tue 2015-03-31
14:43:04 BST. --
debian #

It does not work. Verified on both i386 and amd64 that there are no logs shown.