so. i downloaded and installed plex on centos. logged in, opened it, signed out and stopped the service.
ive then made /home/plexdata/Library/Application Support/Plex Media Server
unzip my media, metadata, plug-ins and plug-in support there.
then i tried to follow your you asked me to previously do, but i dont fully understand it hence how im suppose to adapt it.
so i will call it a night after 11 days in a row at work i think i need some sleep before i do something stupid 
It’s totally ok. If you put everything in /home/plexdata, I can take it from here.
sudo chown -R plex:plex /home/plexdata
# Move data directory to /home/plexdata
[Service]
Environment="PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR=/home/plexdata/Library/Application Support"
d. With the text above saved and in that file, tell the system it’s there
sudo systemctl daemon-reload
e. Rename the old Library directory so we can easily verify it’s no longer being used.
cd /var/lib/plexmediaserver
sudo mv Library Library-old
f. Start plex
sudo systemctl start plexmediaserver
If everything is correct, PMS will now come up and run normally with all the existing data.
We verify this by typing ls -la /var/lib/plexmediaserver and making certain no new Library directory has been created.
When verification is complete, remove the old copy of the metadata
sudo rm -rf /var/lib/plexmediaserver/Library-old
That’s it, All done.
Great But before I do that once I get home
i think it’s important to mention, I did not make a plex:plex user or group before or after my installation yesterday.
I did not follow any other guide besides what you told me in your installation message 18
WHen you install Plex, if user plex doesn’t exist, I create it for you 
The guide I gave you above is the same I wrote here, abbreviated for you, knowing the data is already in place.
well im pretty sure all that worked! i just didn’t delete Library-old, in case i dunno that the world ends 
i just got 2 more questions.
in web browser http://127.0.0.1:8888/web or localhost:8888/web gave me an unable to connect error, but with :32400 it took me to the log in page server setup and asks me to give a name to the server and point to my media folder.
i think i have one last thing to do before i can update my libraries (once i get to see them again) Plex doesnt see my media folders. i found this guide you wrote Linux Tips - #2 by ChuckPa
and i believe thats what i need to do for plex to be able to see my HDDs.
basically, (i think) i took my 3 internal HDD and made one. all my media is on /dev/md0
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 6.2G 44G 13% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 10M 16G 1% /dev/shm
tmpfs 16G 18M 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda1 1014M 320M 695M 32% /boot
/dev/mapper/centos-home 1.8T 79G 1.7T 5% /home
tmpfs 3.2G 64K 3.2G 1% /run/user/1000
/dev/md0 5.5T 2.3T 3.2T 42% /run/media/aurelie/c959b441-08ff-4a80-adcf-6ee256c01ce9
EDIT: i just realized my array of my 3 2TB drives are formatted as XFS. Can i still follow your guide with it or should I reformat it?
sh-4.2# blkid /dev/md0
/dev/md0: UUID="c959b441-08ff-4a80-adcf-6ee256c01ce9" TYPE="xfs"
i’m starting to see the light at the end of the tunnel thanks to your big help. i’m very grateful you are holding the lantern
I apologize if I’ve confused along the way.
Port 8888 is used when dealing with a SSH-tunnel to a remote host. Port 32400 is used when on your LAN or on the machine itself.
For /dev/md0 you can use the name directly in /etc/fstab because it won’t change. Specify xfs and done.
/dev/md0 /mount/point/here xfs defaults,auto,bg,nofail 0 2
The 0 says not to back it up. The 2 says to run fsck if needed (second device to check)
A. So it’s normal logging into 32400 it asked me to setup a new server And not see my old one?
Coming from Windows, it will not have the old server ID info (those are in the registry somewhere and I don’t know windows)
Let it think you’re creating a new server HOWEVER Skip the part of creating new library sections. They still exist. Set other preferences as you wish.
When you get to the dashboard, Fix the paths to your media.
1.what does bg mean? i imagine rw means read write and ro means read only
i think my disks are already mounted and full of media, so i should not mount and unmount it like in your guide?
so if i understand correctly i should:
nano /etc/fstab
/dev/md0 /run/media/aurelie/c959b441-08ff-4a80-adcf-6ee256c01ce9 xfs defaults,auto,bg,nofail 0 2
save, restart computer and then give the correct permissions
su
find /dev/md0 -type d -exec chmod 755 {} \;
find /dev/md0 -type f -exec chmod 644 {} \;
Is this right? did i understand correctly?
ALMOST THERE!
sudo sh
mkdir /raid
mkdir /raid/md0
chmod -R 755 /raid
/dev/md0 /raid/md0 xfs defaults,auto,bg,nofail 0 2
We do this because /run is reserved to the desktop’s file manager. Plex can’t get there (default linux security will block plex from seeing your files). We create an easily accessible & common place that makes sense. Since this is a raid volume, why not use /raid ?
As for the options:
Once mounted, you refer to /raid/md0 for all subsequent command and usage in PMS.
We are so close i can feel it!
now this is what happened when i tried to mount it as /raid/md0 :
mkdir /raid
sh-4.2# mkdir /raid/md0
sh-4.2# chmod -R 755 /raid
sh-4.2# nano /etc/fstab
sh-4.2# nano -w /etc/fstab
sh-4.2# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/centos-root 52403200 6427656 45975544 13% /
devtmpfs 16340896 0 16340896 0% /dev
tmpfs 16357660 6700 16350960 1% /dev/shm
tmpfs 16357660 18320 16339340 1% /run
tmpfs 16357660 0 16357660 0% /sys/fs/cgroup
/dev/sda1 1038336 327448 710888 32% /boot
/dev/mapper/centos-home 1882658652 82580900 1800077752 5% /home
tmpfs 3271532 48 3271484 1% /run/user/1000
/dev/md0 5858060288 2451017812 3407042476 42% /run/media/aurelie/c959b441-08ff-4a80-adcf-6ee256c01ce9
sh-4.2# umount /run/media/aurelie/c959b441-08ff-4a80-adcf-6ee256c01ce9
sh-4.2# mount /raid/md0
mount: wrong fs type, bad option, bad superblock on /dev/md0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
now what?
ok… Very simple
sudo blkid /dev/md0
It will tell you what it’s formatted as.
Make sure /etc/fstab matches whatever it’s formatted as
sudo blkid /dev/md0
/dev/md0: UUID="c959b441-08ff-4a80-adcf-6ee256c01ce9" TYPE="xfs"
now i’m guessing you need to see my /etc/fsab file?
Yes please’
If you also have XFS there,
Let’s make sure XFS utility are installed (your’re missing something like a mount.xfs file)
yum install xfsprogs xfsdump
i’ll do this
seems like it wasnt that
sh-4.2# yum install xfsprogs xfsdump
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
epel/x86_64/metalink | 12 kB 00:00:00
* base: mirror.calgah.com
* epel: mirror.csclub.uwaterloo.ca
* extras: mirror.calgah.com
* updates: mirror.calgah.com
Webmin | 2.9 kB 00:00:00
base | 3.6 kB 00:00:00
download.mono-project.com_repo_centos_ | 2.9 kB 00:00:00
epel | 4.7 kB 00:00:00
extras | 3.4 kB 00:00:00
teamviewer | 2.5 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/2): epel/x86_64/updateinfo | 992 kB 00:00:00
(2/2): epel/x86_64/primary_db | 6.7 MB 00:00:00
Package xfsprogs-4.5.0-19.el7_6.x86_64 already installed and latest version
Package xfsdump-3.1.7-1.el7.x86_64 already installed and latest version
Nothing to do
if your root is xfs, you have the mount.xfs.
Someting not making sense herer.
Pair down the mount command:
defaults,auto and see what it does (manual mount of /raid/md0
ok i’ll take off the bg, nofail in the /etc/fstab file then?
yes
experiment on the command line directly
# mount -o defaults -t xfs /dev/md0 /raid/md0
Now you can add options separated by comma and find what is not right
