To increase a File system size, you basically need to follow 4 steps
1: Find which meta belongs to Mount
2: Add Slice to Meta:
metattach d51 /dev/dsk/c11t60060160F87019005E06236CFC36E111d0s0
3: Make sure meta is showing new slice
metastat d51
4: Grow File System
growfs -M /u01 /dev/md/rdsk/d51
Easy …