[CentOS] xfs

I used to be able to 'repair' ext4 fs issue (when the boot process drops
you into emergency mode)...

but now with xfs - it does not seem to let me do that.

xfs_repair /dev/sda3
or
xfs_repair -L /dev/sda3
both say fatal error
fatal error -- couldn’t initialize XFS library

How can I repair XFS with burning a DVD and finding an external USB reader
etc...

Thanks,

Jerry