This is virtual disk on iscsi that was moved from one Proxmox system to another. /dev/sdc doesn't have the "a" attribute so I'm unable to use the disk. This disk also has 9 out of the 11 TB used.
PV VG Fmt Attr PSize PFree
/dev/sda3 pve lvm2 a-- 931.07g 15.79g
/dev/sdc lvm2 --- 10.92t 10.92t
PV VG Fmt Attr PSize PFree
/dev/sda3 pve lvm2 a-- 931.07g 15.79g
/dev/sdc lvm2 --- 10.92t 10.92t