4 TB ext4 mount problem

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Hi,

I cannot mount 4 TB disk partition (logical volume ) . I created as gpt by gparted.

mount -t ext4 /dev/mapper/vgOpt-opt /opt/
mount: wrong fs type, bad option, bad superblock on /dev/mapper/vgOpt-opt,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.
YT

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