Great advice so far guys, you are giving me a good understanding, I really appreciate it.

Also, the server has 4 HDD.


format

Searching for disks...done

AVAILABLE DISK SELECTIONS:

0. c1t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>

/pci@1e,600000/pci@0/pci@a/pci@0/pci@8/scsi@1/sd@0,0

1. c1t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>

/pci@1e,600000/pci@0/pci@a/pci@0/pci@8/scsi@1/sd@1,0

2. c1t2d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>

/pci@1e,600000/pci@0/pci@a/pci@0/pci@8/scsi@1/sd@2,0

3. c1t3d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>

/pci@1e,600000/pci@0/pci@a/pci@0/pci@8/scsi@1/sd@3,0

I will need to Mirror 0 and 2 ... and Mirror 1 and 3....

Futher info:

# df -h
Filesystem size used avail capacity Mounted on
/dev/dsk/c1t0d0s0 11G 7.0G 3.4G 68% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 15G 1.1M 15G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object

/platform/sun4u-us3/lib/libc_psr/libc_psr_hwcap1.so.1
11G 7.0G 3.4G 68% /platform/sun4u-us3/lib/libc_psr.so.1

/platform/sun4u-us3/lib/sparcv9/libc_psr/libc_psr_hwcap1.so.1
11G 7.0G 3.4G 68% /platform/sun4u-us3/lib/sparcv9/libc_psr.so.1

/dev/dsk/c1t0d0s5 5.8G 1.9G 3.8G 34% /var
swap 15G 16K 15G 1% /tmp
swap 15G 64K 15G 1% /var/run
/dev/dsk/c1t1d0s0 67G 35G 31G 54% /gsn
/dev/dsk/c1t0d0s3 49G 50M 48G 1% /export/home

I have read the websites and have a good understanding of how to do it.
I am just a bit cautious since this is my first time doing this procedure and thought it could only be done on installation.

From the info I have given now, it is possible right?
I cant get more info if you tell me what commands to do

Thanks a million experts!!