Root disk space shows full due to mounted disk

S

scurrier

Well-Known Member
Sep 9, 2017
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Hello,

I mounted a second disk under /mnt/myseconddisk and added it via the web gui as storage for backups. The second disk is a big one and no where near becoming full. The root storage of the node is also not full, but when backing up a container to the second disk, I noticed that the summary page for the node showed that the node's root storage was becoming full, as if I was backing up directly to it:

HD space(root) 94.94% (89.24 GiB of 93.99 GiB)

Did I mount the second disk in the wrong place or something? Is this going to screw up my node? How do I get proxmox to properly reflect the true root hard drive space so I can see how close I am to danger and undefined behavior of having a full disk?
 
Thanks for your help.

Below is the output of the commands requested.

To make the original post easier to understand, I had changed the name of the path to the second disk mount location. The actual path is /mnt/seagate2tb (referred to as /mnt/myseconddisk in OP).

mount
Code: 
root@pve:~# mount
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=8145712k,nr_inodes=2036428,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=1632408k,mode=755)
/dev/mapper/pve-root on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=39,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=651)
mqueue on /dev/mqueue type mqueue (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
sunrpc on /run/rpc_pipefs type rpc_pipefs (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
configfs on /sys/kernel/config type configfs (rw,relatime)
lxcfs on /var/lib/lxcfs type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
/dev/fuse on /etc/pve type fuse (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,relatime)
//thumper/media on /mnt/bindmounts/plexhost/media type cifs (rw,relatime,vers=3.0,sec=ntlmssp,cache=strict,username=plex,domain=,uid=0,noforceuid,gid=0,noforcegid,addr=10.0.200.11,file_mode=0755,dir_mode=0755,nounix,serverino,mapposix,noperm,rsize=1048576,wsize=1048576,echo_interval=60,actimeo=1)
tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,size=1632408k,mode=700)

df -h
Code: 
root@pve:~# df -h
Filesystem            Size  Used Avail Use% Mounted on
udev                  7.8G     0  7.8G   0% /dev
tmpfs                 1.6G  162M  1.4G  11% /run
/dev/mapper/pve-root   94G   90G     0 100% /
tmpfs                 7.8G   37M  7.8G   1% /dev/shm
tmpfs                 5.0M     0  5.0M   0% /run/lock
tmpfs                 7.8G     0  7.8G   0% /sys/fs/cgroup
/dev/fuse              30M   16K   30M   1% /etc/pve
//thumper/media       6.1T  5.7T  399G  94% /mnt/bindmounts/plexhost/media
tmpfs                 1.6G     0  1.6G   0% /run/user/0

cat /etc/fstab
Code: 
root@pve:~# cat /etc/fstab
# <file system> <mount point> <type> <options> <dump> <pass>
/dev/pve/root / ext4 errors=remount-ro 0 1
/dev/pve/swap none swap sw 0 0
proc /proc proc defaults 0 0
//thumper/media /mnt/bindmounts/plexhost/media cifs rw,credentials=/home/.smbcredentials-plexhost,vers=3.0,noperm,auto 0 0

du -hsx /*
Code: 
root@pve:~# du -hsx /*
13M     /bin
53M     /boot
0       /dev
5.4M    /etc
8.0K    /home
373M    /lib
4.0K    /lib64
16K     /lost+found
4.0K    /media
30G     /mnt
4.0K    /opt
du: cannot access '/proc/28816/task/28816/fd/3': No such file or directory
du: cannot access '/proc/28816/task/28816/fdinfo/3': No such file or directory
du: cannot access '/proc/28816/fd/3': No such file or directory
du: cannot access '/proc/28816/fdinfo/3': No such file or directory
0       /proc
64K     /root
162M    /run
13M     /sbin
4.0K    /srv
0       /sys
32K     /tmp
762M    /usr
59G     /var
 
Darn it. Just came back here to say this. I went to migrate the disk with the backups that I thought were on it to a new machine and found they weren't there. I went back to the old machine and saw that the backup was still there! Boy, am I embarrassed. I wish I had seen this message when you posted it, it would have saved me some major aggravation. I must not have saved the fstab file when I edited it.

Thanks for your help! I'll pay you hush money to not tell anyone about this. :)
 
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