disk 2 disk mirror

Dear friends & gurus

i have some servers running solaris 10 intel machines,they are in mirror disk 2 disk there is no any hardware RAID only software RAID and they are in remote place.

1) solaris 10 OS c0t0d0(Disk1) & cotod1(Disk2) in mirror (SVM)
2) i want to break the mirror
3) boot from the c0t0d1(Disk2) to check whether it boots and works fine
4) then reboot and boot from c0t0d0 (Disk1).
5) update some patches in c0t0d0(Disk) again reboot to check whether
patches are updated and working fine.
6) finally put both the hard disks in mirror.

and also i have the same scenario for some servers they are in veritas volume manager.

Please give me some step-step method to full fill the above tasks.

Thanks In Advance
Niru

Thanks In Advance
JNReddy.