server – Mounting Drive error – unknown filesystem type ‘LVM2_member’

I have two raid arrays.

  1. sda ~6TB

  2. sdb ~10TB

I have installed ubuntu 20 server on sda array.

I am trying to mount sda3 to /mnt/ssdarray but I am getting the ‘LVM2 member error’
I’m getting the following outputs from necessary commands to sort this out

  >sudo pvscan
  PV /dev/sda3   VG ubuntu-vg       lvm2 (<5.46 TiB / 5.26 TiB free)
  Total: 1 (<5.46 TiB) / in use: 1 (<5.46 TiB) / in no VG: 0 (0   )

  >sudo lvscan
  ACTIVE            '/dev/ubuntu-vg/ubuntu-lv' (200.00 GiB) inherit
  >sudo vgscan
  Found volume group "ubuntu-vg" using metadata type lvm2

  >ls /dev/mapper
  control  ubuntu--vg-ubuntu--lv

  >sudo lvdisplay
  --- Logical volume ---
  LV Path                /dev/ubuntu-vg/ubuntu-lv
  LV Name                ubuntu-lv
  VG Name                ubuntu-vg
  LV UUID                noELuR-2CPE-Db2m-FWYg-wCHe-8OF0-xCcukV
  LV Write Access        read/write
  LV Creation host, time ubuntu-server, 2021-07-20 00:40:57 +0000
  LV Status              available
  # open                 1
  LV Size                200.00 GiB
  Current LE             51200
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0

  >sudo vgs
  VG        #PV #LV #SN Attr   VSize  VFree
  ubuntu-vg   1   1   0 wz--n- <5.46t 5.26t

  >sudo pvs
  PV         VG        Fmt  Attr PSize  PFree
  /dev/sda3  ubuntu-vg lvm2 a--  <5.46t 5.26t

  >sudo lvmdiskscan
  /dev/loop0 (      69.88 MiB)
  /dev/loop1 (      55.38 MiB)
  /dev/loop2 (     <31.09 MiB)
  /dev/sda2  (       1.00 GiB)
  /dev/sda3  (      <5.46 TiB) LVM physical volume
  /dev/sdb1  (       9.91 TiB)
  0 disks
  5 partitions
  0 LVM physical volume whole disks
  1 LVM physical volume

I would like to get access to the entire ~6TB but it is only giving me 200GB and doesn’t seem to show sda3 as an option to mount?

I have tried

sudo mount /dev/ubuntu-vg/ubuntu-lv /mnt/ssd

sudo vgchange -ay /dev/ubuntu-vg
  1 logical volume(s) in volume group "ubuntu-vg" now active

but no success.

Any help would be much appreciated. Stay safe!