Ok so I bought/rent a dedicated server from nocix with Centos 6.8 installed, also came with 2 hard drives
sda - 128GB SSD &
sdb - 2TB HDD and I think I made a mistake by partitioning the second drive /dev/sdb and then reboot but lost the ability to connect via SSH, so I contacted nocix and they said I had to reload with the SystemRescueCd.
So I did that and have been reading/following the steps outlined here: https://www.system-rescue-cd.org/Sysresccd-Partitioning-EN-Repairing-a-damaged-Grub
See below error messages I got when I ran
df: Warning: cannot read table of mounted file systems: No such file or directory df: Warning: cannot read table of mounted file systems: No such file or directory Could not find device for /boot: Not found or not a block device.
See my partitions below. I've got 2 drives sda and sdb.
[=====DEVICE=====] [==FILESYS==] [======LABEL======] [====SIZE====] [MAJ] [MIN] [loop0 ] [squashfs ] [<unknown> ] [ 275.14 MB] [ 7] [ 0] [sda1 ] [ext2 ] [<unknown> ] [ 250.00 MB] [ 8] [ 1] [sda2 ] [LVM2_member] [<unknown> ] [ 119.00 GB] [ 8] [ 2] [sdb1 ] [ext3 ] [/userdata ] [ 1.82 TB] [ 8] [ 17] [dm-0 ] [ext4 ] [<unknown> ] [ 110.25 GB]  [ 0] [dm-1 ] [ext4 ] [<unknown> ] [ 1.00 GB]  [ 1] [dm-2 ] [swap ] [<unknown> ] [ 7.72 GB]  [ 2]
I did see there is another guide about restoring on LVM and then noticed I have an LVM drive.. I am very new to this so I'm not sure what to do.. It's also quite urgent as the websites this server is hosting are down because of I can't get it back online.
EDIT: Output of
WARNING: lvmetad is running but disabled. Restart lvmetad before enabling it! Reading all physical volumes. This may take a while... Found volume group "vg" using metadata type lvm2
And output of
WARNING: lvmetad is running but disabled. Restart lvmetad before enabling it! ACTIVE '/dev/vg/root' [110.25 GiB] inherit ACTIVE '/dev/vg/tmp' [1.00 GiB] inherit ACTIVE '/dev/vg/swap' [7.72 GiB] inherit