For a while now, my workstation has been spewing out this error in rather large volumes :-
Aug 27 00:00:07 pica multipathd[1686]: pktcdvd0: unusable path (wild) - checker failed(about 18,000 per day)
The multipath daemon is for handling block devices (disks) with multiple connections and dynamically updating the geometry when errors occur. Not the sort of thing that you usually find in a workstation (or indeed most servers) and indeed it appears that I only have this installed because I started with the server install of Ubuntu.
It wasn’t causing any harm but it was annoying that it was spamming syslog log files, so I took a look at fixing it. Turns out it is rather easy. Just edit /etc/multipath.conf and add a “blacklist” section :-
blacklist {
devnode "^pktcdvd0"
}The parameter to “devnode” is a regular expression but in this case we can get away with a “^” (meaning beginning of string) followed by the name of the device.
At this point, you could restart the daemon :-
systemctl restart multipathd.serviceThis shouldn’t cause any problems on most machines without multiple paths; and it probably won’t be a problem for servers which do have multiple paths. But in the later case, I’d test it or just go for a full reboot.
