We have a cPanel server using centos7 as based system, all monitors are fine except the hard disks seems can't detect any local drives and always shows "Data not available" as result. We do have other centos7 based system that runs pulseway and can detect all hard disks and mounting points as well. Do we have to enable any service for pulseway to detect the hard disks? Or there is some failure on system? Thank you.
 
	P.S. below is the result when runs df -h on the problematic server: 
	Filesystem                               Size  Used Avail Use% Mounted on 
	/dev/mapper/cl-root           50G   19G   32G  37% / 
	devtmpfs                                  16G     0   16G   0% /dev 
	tmpfs                                         16G     0   16G   0% /dev/shm 
	tmpfs                                         16G  105M   16G   1% /run 
	tmpfs                                         16G     0   16G   0% /sys/fs/cgroup 
	/dev/mapper/cl-home        138G  401M  137G   1% /home 
	/dev/sda1                                1014M  183M  832M  19% /boot 
	192.168.1.90:/volume1/CPanel_Data             35T  8.1T   27T  24% /mnt/user_cpanel 
	tmpfs                                        3.2G     0  3.2G   0% /run/user/0 
	\\192.168.1.122\media   1.0T  708G  317G  70% /mnt/prmmedia 
	192.168.1.96:/cPanel_BK  7.3T  3.8T  3.6T  52% /mnt/cpbackup 
	192.168.1.90:/volume1/CPanel_Data/polaris     35T  8.1T   27T  24% /home/virtfs/polaris/mnt/user_cpanel/polaris 
	192.168.1.90:/volume1/CPanel_Data/prmtaiwan   35T  8.1T   27T  24% /home/virtfs/prmtaiwan/mnt/user_cpanel/prmtaiwan 
	192.168.1.90:/volume1/CPanel_Data/twgolfcom   35T  8.1T   27T  24% /home/virtfs/twgolfcom/mnt/user_cpanel/twgolfcom