To know the file system type for mount points we can use command df -n, it will display filesystem types for all the mounted partitions.
bash-3.00$ df -n
/ : ufs
/devices : devfs
/system/contract : ctfs
/proc : proc
/etc/mnttab : mntfs
/etc/svc/volatile : tmpfs
/system/object : objfs
/platform/sun4u-us3/lib/libc_psr.so.1: lofs
/platform/sun4u-us3/lib/sparcv9/libc_psr.so.1: lofs
/dev/fd : fd
/tmp : tmpfs
/var/run : tmpfs
/data1 : ufs
/R12Stage : zfs
/dbdata : zfs
