First that you have to know if your disk will be configured in svm raid o, raid1 or raid 5 if so you can used the metainit command
for raid1: / filesystem

metainit -f d10 1 1 /dev/dsk/c0t0d0s0
metainit d20 1 1 /dev/dsk/c0t1d0s0
metainit d0 -m d10
metaroot d0
init6
metattach d0 d20

This file contains a list of devices(& their physical
addresses) whos modules have been loaded by the kernel.

This file will list devices physical path & its instance.

1) who -a |grep username

2) get the process id 

3)kill -9 pid

4)passwd -l username

5)passwd username --change the user password

/etc/bin It contain user exicuting commands
/etc/sbin it contain super user exicuting commands

There are four critical filesystems in solaris.They are,

Root or /— Files and directories of the OS.
Swap— Virtual memory space
/opt— Application software added to a system. 
/usr— OS commands by users.

root or /
/var

/ - root
/usr - usr binaries and libraries
/var - storing system stats
swap - swap space

format command

iostat -E command & Using smc

uname -a

#uname -a 

#showrev