Your syslog in the diagnostics has:
XFS (md1p1): corrupt dinode 1073741953, (btree extents).
Dec 22 13:27:45 Tower kernel: XFS (md1p1): Metadata corruption detected at xfs_iread_bmbt_block+0x76/0x1dd [xfs], inode 0x40000081 xfs_iread_bmbt_block
Dec 22 13:27:45 Tower kernel: XFS (md1p1): Unmount and run xfs_repair
so at very least you need to run a check filesystem on disk1 as file system corruption can stop shares showing up as expected. It would not do any harm to also do the other drives just in case.