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docker suddenly lost all containers, tried to add containers back and failures

Featured Replies

Hi

This all started with I kept getting the dreaded docker.img full utilization message, which I traced to plex.

Did some of the changes that I found on SpaceInvader One's site, as well as another post with how to change the docker image storage into a directory. That messed up things more!

Searched to see if I had an orphan image. I did. Removed it, Went in to add previous containers from inside docker and they added.

This afternoon, they're gone. AND BONUS, when I tried to add them back, multiple ways, I get this message (I was trying to add Plex back in)

docker: Error response from daemon: invalid output path: stat /var/lib/docker/overlay2/a8e0da990e4d3948d0723d05b47dd41b11f3787e3be0866885d61887e998d649: no such file or directory

Not sure what to do or what is going on. Jorge B., if you're still the docker guru, I could use your help again! Diagnostics attached.

Thanks in advance for any help anyone can provide.

tower-diagnostics-20260614-1255.zip

  • Community Expert

Changing to docker folder is not really the fix for growing docker img. Looks like you had given it 90GB and still filled it.

The usual cause of filling docker.img is an application writing to a path that isn't mapped.

I recommend going back to docker.img, 50G should be plenty, and reinstalling everything from previous apps. Then you can try to troubleshoot your dockers one at a time to see which is filling docker.img

https://docs.unraid.net/unraid-os/troubleshooting/common-issues/docker-troubleshooting/

  • Author

Hi trurl

The problem is, I can't reinstal previous apps. That's where I get that error message as noted above and command failed message

I tried to recreate but there is no option to delete Docker vdisk file

Attached is docker screenshot

Screenshot 2026-06-14 144447.png

  • Community Expert

There is an option to delete docker directory though.

  • Author

OK, I wasn't sure if that was doing the same as the deleting the vDisk file

  • Author

OK, I deleted the docker directory, went back in to re-add my calibre container and received this message:

docker: Error response from daemon: invalid output path: stat /var/lib/docker/overlay2/d3c500dceffb37757b6c41d871deb6310b99e2cd0532ab56fe48f5f30257a829: no such file or directory

Run 'docker run --help' for more information

The command failed.

I also had an orphan image pop up immediately (screenshot attached). I deleted it and went to add calibre again. Received same message as above, orphan also returned.

Screenshot 2026-06-14 161227.png

  • Community Expert

Did you change it to docker.img instead of docker folder?

  • Author

Where am I looking to change to docker.img? I went to advance view in docker from settings, I don't see anything like that. Started docker, tried to load calibre again, and I didn't see anything like that before I tried to load it in calibre page

Edited by isrdude

  • Author

OK, Good news. Found where it switched to directory and switched to btfs vDisk and set size to 50mb. Loaded all my containers back and here is where it gets interesting. It appears it's putting plex data in one of my folders (attached screenshot).

How would I proceed to find out which is definitively filling up my image as I originally thought it was Plex as it appears to be putting data into a folder within the container that it desires.

Screenshot 2026-06-14 171413.png

Edited by isrdude
more info provided

  • Community Expert

Is plex the only container you have reinstalled so far?

  • Author

No. I have reinstalled:

Plex

Calibre

Diskspeed

Doku

Munin-Server

Overseerr

Tautulli

Plex, Calibre, Overseerr, Tautulli are the only ones that I have started up

  • Community Expert

On the Docker page, click Container Size button at bottom and post the results, along with new diagnostics.

  • Community Expert

That all looks reasonable so far and only using 15% of docker.img

Post docker run for plex

  • Author

I added some data to calibre and Plex be interesting to see if there were any changes, Here is the docker run

docker run
  -d
  --name='Plex-Media-Server'
  --net='host'
  --pids-limit 2048
  -e TZ="America/New_York"
  -e HOST_OS="Unraid"
  -e HOST_HOSTNAME="Tower"
  -e HOST_CONTAINERNAME="Plex-Media-Server"
  -e 'PLEX_CLAIM'='claim-xxx'
  -e 'PLEX_UID'='99'
  -e 'PLEX_GID'='100'
  -e 'VERSION'='latest'
  -l net.unraid.docker.managed=dockerman
  -l net.unraid.docker.webui='http://[IP]:[PORT:32400]/web'
  -l net.unraid.docker.icon='plex-server.png'
  -v '/mnt/cache/appdata/Plex-Media-Server/':'/transcode':'rw'
  -v '/mnt/user/Media':'/data':'rw'
  -v '/mnt/user/Media/2017 Stanley Cup Final Pens vs Sharks/':'/2017 Stanley Cup Final Pens vs Sharks':'rw'
  -v '/mnt/user/Media/Hallmark/':'/Hallmark':'rw'
  -v '/mnt/user/Media/Idi Only/':'/Idi Only':'rw'
  -v '/mnt/user/Media/Movies/':'/Movies':'rw'
  -v '/mnt/user/Media/Great Courses America'\''s Founding Fathers/':'/Great Courses America'\''s Founding Fathers':'rw'
  -v '/mnt/user/Media/2024 Car Shows/':'/2024 Car Shows':'rw'
  -v '/mnt/user/Media/Baseball/':'/Baseball':'rw'
  -v '/mnt/user/Media/Christmas Trains/':'/Christmas Trains':'rw'
  -v '/mnt/user/Media/Classic Car Restoration Videos/':'/Classic Car Restoration Videos':'rw'
  -v '/mnt/user/Media/College Football/':'/College Football':'rw'
  -v '/mnt/user/Media/Documentary/':'/Documentary':'rw'
  -v '/mnt/user/Media/Dominique Graduation Photos/':'/Dominique Graduation Photos':'rw'
  -v '/mnt/user/Media/Ed Only/':'/Ed Only':'rw'
  -v '/mnt/user/Media/Emily & Rich
  - The Wedding/':'/Emily & Rich
  - The Wedding':'rw'
  -v '/mnt/user/Media/Extended Pfeifer Family Vid'\''s/':'/Extended Pfeifer Family Vid'\''s':'rw'
  -v '/mnt/user/Media/Family Only/':'/Family Only':'rw'
  -v '/mnt/user/Media/Glee HD Vid'\''s/':'/Glee HD Vid'\''s':'rw'
  -v '/mnt/user/Media/Golf/':'/Golf':'rw'
  -v '/mnt/user/Media/Hockey/':'/Hockey':'rw'
  -v '/mnt/user/Media/iTunes Music Vids/':'/iTunes Music Vids':'rw'
  -v '/mnt/user/Media/Kitchen Rebuild/':'/Kitchen Rebuild':'rw'
  -v '/mnt/user/Media/Lexi Texas Tech Graduation Photos 11 May 2024/':'/Lexi Texas Tech Graduation Photos 11 May 2024':'rw'
  -v '/mnt/user/Media/Lexi Texas Tech Graduation Video 11 May 2024/':'/Lexi Texas Tech Graduation Video 11 May 2024':'rw'
  -v '/mnt/user/Media/Mig Welding/Lesson Videos/':'/Mig Welding Lesson Videos':'rw'
  -v '/mnt/user/Media/Laura'\''s Graduation Photo'\''s/':'/Laura'\''s Graduation Photo'\''s':'rw'
  -v '/mnt/user/Media/Laura'\''s Wedding Photo'\''s/':'/Laura'\''s Wedding Photo'\''s':'rw'
  -v '/mnt/user/Media/Muniz Family Only Videos/':'/Muniz Family Only Videos':'rw'
  -v '/mnt/user/Media/Music DVD'\''s/':'/Music DVD'\''s':'rw'
  -v '/mnt/user/Media/Music Library/':'/Music Library':'rw'
  -v '/mnt/user/Media/Music Singles/':'/Music Singles':'rw'
  -v '/mnt/user/Media/O'\''Harren Family/':'/O'\''Harren Family':'rw'
  -v '/mnt/user/Media/Ohio State Football/':'/Ohio State Football':'rw'
  -v '/mnt/user/Media/OLD TIME RADIO/':'/Old Time Radio':'rw'
  -v '/mnt/user/Media/Old Time Radio Music/':'/Old Time Radio Music':'rw'
  -v '/mnt/user/Media/OSU vs Xichigan Games/':'/OSU vs Xichigan Games':'rw'
  -v '/mnt/user/Media/Other Music Videos/':'/Other Music Videos':'rw'
  -v '/mnt/user/Media/Pittsburgh Penguins/':'/Pittsburgh Penguins':'rw'
  -v '/mnt/user/Media/Pro Football/':'/Pro Football':'rw'
  -v '/mnt/user/Media/Queen Elizabeth II Funeral and Bio/':'/Queen Elizabeth II Funeral':'rw'
  -v '/mnt/user/Media/Rick & Monica
  - The Elvis Wedding/':'/Rick & Monica
  - The Elvis Wedding':'rw'
  -v '/mnt/user/Media/Rick And Monica Wedding/':'/Rick & Monica Wedding':'rw'
  -v '/mnt/user/Media/Rick'\''s Retirement from USAF/':'/Rick'\''s Retirement from USAF':'rw'
  -v '/mnt/user/Media/Rick'\''s Retierement Luncheon/':'/Rick'\''s Retierement Luncheon':'rw'
  -v '/mnt/user/Media/Ruby Beauty 2024/':'/Ruby Beauty 2024':'rw'
  -v '/mnt/user/Media/Space Apollo Program Shows/':'/Space Apollo Program Shows':'rw'
  -v '/mnt/user/Media/Star Trek Audiobooks/':'/Star Trek Audiobooks':'rw'
  -v '/mnt/user/Media/Star Trek Fan Films/':'/Star Trek Fan Films':'rw'
  -v '/mnt/user/Media/The Classic Adventures of Sherlock Holmes/':'/The Classic Adventures of Sherlock Holmes':'rw'
  -v '/mnt/user/Media/The Coronation of King Charles III and Camilla/':'/The Coronation of King Charles III and Camilla':'rw'
  -v '/mnt/user/Media/The D-Day Tapes/':'/The D-Day Tapes':'rw'
  -v '/mnt/user/Media/The Further Adventures Of Sherlock Holmes/':'/The Further Adventures Of Sherlock Holmes':'rw'
  -v '/mnt/user/Media/Wisehart Family Memories/':'/Wisehart Family Memories':'rw'
  -v '/mnt/user/Media/YouTube Car Shows/Hot Rod Drag Week 2024/':'/Hot Rod Drag Week 2024':'rw'
  -v '/mnt/user/Media/Audiobooks/':'/Audiobooks':'rw'
  -v '/mnt/user/Media/History Audiobooks/':'/History Audiobooks':'rw'
  -v '/mnt/user/Media/A&E Biography/':'/A&E Biography':'rw'
  -v '/mnt/user/Media/Car Shows & Cruise In'\''s 2023/':'/Car Shows & Cruise In'\''s 2023':'rw'
  -v '/mnt/user/Media/Pictures/Muniz Family 16 Feb 2014/':'/Muniz Family 16 Feb 2014':'rw'
  -v '/mnt/user/Media/Pictures/John Rowland Retirement 2006/':'/John Rowland Retirement':'rw'
  -v '/mnt/user/Media/Sports/':'/Sports':'rw'
  -v '/mnt/user/Media/Chrystals Uncle McQ Adventure/':'/Chrystal'\''s Uncle McQ Adventure':'rw'
  -v '/mnt/user/Media/comedy/':'/Comedy':'rw'
  -v '/mnt/user/Media/D-Day And The Bulge/':'/D-Day And The Bulge':'rw'
  -v '/mnt/user/Media/Great Courses America'\''s Founding Fathers/':'/Great Courses America'\''s Founding Fathers':'rw'
  -v '/mnt/user/Media/Harry Nile/':'/Harry Nile':'rw'
  -v '/mnt/user/Media/Imagination Theater/':'/Imagination Theater':'rw'
  -v '/mnt/remotes/TOWER3_Media3/TV SHOWS/':'/TV SHOWS':'rw'
  -v '/mnt/user/Media/1952 Chevy 3100 Pictures/':'/1952 Chevy 3100 Pictures':'rw'
  -v '/mnt/user/appdata/Plex-Media-Server':'/config':'rw' 'plexinc/pms-docker'

a6c2761cce807ff4ac7b2676da8d0df5ca0a573bfdd0e03af0e9373577c9f630

The command finished successfully!

  • Community Expert

I xxx your claim token.

That's a lot of path mappings!

Do you use the DVR feature?

  • Author

Thank you, I missed that!

No. I've never used the DVR feature. Never really had a need to use it.

Yeah, I've heard that a lot about my mapping But it makes sense for me for the way I catalog and separate everything out for ease of manual search.

  • Community Expert

DVR and transcoding are the only ways Plex should be writing anything (except to its own database in Appdata).

Post a screenshot of Plex Transcoder Settings (Show Advanced)

  • Author

That's how I always understood it too! Here is the screenshot

Screenshot 2026-06-19 101615.png

  • Community Expert

That is not the screenshot I was asking for. That information is already in docker run you posted.

23 hours ago, isrdude said:

 -v '/mnt/cache/appdata/Plex-Media-Server/':'/transcode':'rw'

I am talking about the Transcoder Settings within the Plex application

  • Author

OH, gotta!

Screenshot 2026-06-19 133057.png

  • Community Expert

That looks OK too.

The only other container you have that I use is DiskSpeed, and it doesn't have any paths except its appdata.

On 6/18/2026 at 9:24 AM, trurl said:

only using 15% of docker.img

What do you get now with this command line?

df -h /dev/loop2
  • Author

This what I get:

Filesystem Size Used Avail Use% Mounted on

/dev/loop2 50G 6.8G 44G 14% /var/lib/docker

Part of me wonders if it isn't Calibre that is causing the issue. Things are looking OK now that I put everything back on. But it was OK before and then just started to grow. The only dockers that add data are plex and calibre. It is growing compared to what I posted above

calibre                                         3.55 GB                  15.4 MB                  238 kB
DiskSpeed                                       950 MB                   3.49 MB                  9.30 kB
Plex-Media-Server                               721 MB                   363 MB                   2.39 kB
overseerr                                       718 MB                   22.7 kB                  2.20 MB
munin-server                                    341 MB                   470 kB                   9.46 kB
Doku                                            234 MB                   5.04 MB                  408 kB
tautulli                                        203 MB                   2.67 kB                  22.1 MB
Total size                                      6.72 GB                  387 MB                   24.9 MB
  • Author

Made a small tweak to Calibre from an online post I found. Changed the generic LIBRARYINTERNALPATH was going and sending it to my mapped calibre library. Appears it impacted the writable size from the above previous size:

calibre                                         3.54 GB                  3.19 MB                  42.6 kB

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