While running fsck utility, we encountered a problem with the primary superblock. We were then prompted to recover from an alternative superblock. Remember to specify the rdsk and know that block 32 is always an alternative superblock.
# fsck - o b=32 /dev/rdsk/c0t0d0s6
Determine which superblocks are available newfs -Nv /dev/rdsk/c0t0d0s6