Bug 89855 - `journalctl /dev/sda` always shows empty log
Summary: `journalctl /dev/sda` always shows empty log
Status: RESOLVED FIXED
Alias: None
Product: systemd
Classification: Unclassified
Component: general (show other bugs)
Version: unspecified
Hardware: Other Linux (All)
: medium normal
Assignee: systemd-bugs
QA Contact: systemd-bugs
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Blocks:
 
Reported: 2015-03-31 22:20 UTC by Chris Bainbridge
Modified: 2015-04-14 13:34 UTC (History)
0 users

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Description Chris Bainbridge 2015-03-31 22:20:38 UTC 
`man journalctl` says:

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

           journalctl /dev/sda

But:

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

On both Debian Jessie and Fedora 21, the log is simply empty. Is this supposed to work yet? If not, it seems premature to give such an example in the man page. If it is supposed to work, then something is wrong with the current releases.
Comment 1 Lennart Poettering 2015-04-14 13:34:32 UTC 
Yeah, this requires kernel support, that never materialized.

I removed the example from the man pages now, to make this less confusing.

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