I have a monitor attached to my system. Nothing shows in the error log. According to an Ubuntu discussion, this is a USB issue and does not usually entail actual drive failures...just USB Port issues. I do have an Unassigned device that is a 128GB USB Stick I was using to play with dockers. I can remove that to see if it stops, but it's been working for months without a complaint. The only reason I saw it was I was about to install a new drive and I was preparing for a preclear and there was a whole screen of these errors on the monitor when I turned it on - I decided to ignore these and do my preclear.

 

Soon after I started the preclear, playback failed and I lost communication with unraid. I had to (unclean) restart the system so it is doing a parity check right now. I don't think this is related and might be a fluke. I guess I'll find out when I restart the preclear. Right now I am contemplating if I want to restart it WHILE the parity check is running or if I wanna wait. (I don't like anything to be not "normal" when I am about to replace a disk - including doing the preclear. I ignored this this time and SEE WHAT IT GOT ME  ) All my previous parity checks have been OK.

 

I went down an hour ago and reseated the USB Device in the socket - It DID move a bit. No more "SG_IO" errors have appeared. I'll post an update later if this is indeed the only thing I had to change. I thought I would share in case anybody else might see this issue.

 

-UPDATE-

And - I was 15% into the parity check and I restarted the preclear and the exact same thing happened. We were watching a movie and ~3 minutes into the preclear - the screen froze, loss of video stream, if you tried to resume playback - the server was simply not there anymore and within 2 minutes of Kodi freezing - the server went completely incommunicado. The only way to get anything working again was to do a dirty boot (hold power switch to force shutdown) which wipes the log. Grrr.

 

 

I'll wait to start it again until after the parity check finishes. Syslog Attached. Maybe someone sees something I don't?

tower-syslog-20161222-1931.zip

Parity check finished ok.

 

This morning, more SG_IO errors appeared. I am pulling the 2 dockers I was using out of service and removing the USB device. The log shows nothing, but the errors still appear on the monitor. Freaky.

 

 

The SG_IO errors are annoying but harmless messages related to your extra USB stick.  See this defect report:

  https://lime-technology.com/forum/index.php?topic=52052.msg499727#msg499727

 

 

Yep - I could make the errors stop for a while, but they seem to always return. I just removed the annoying USB stick and the dockers. I was only testing with them anyway.  As soon as the USB was removed...no more warnings.

 

Thanks for reading and responding.