Simplest way to protect the boot disk

I have a solaris T2000 machine.
It has two internal disks - and it boots off one of these. The disks are not in an hardware or software RAID configuration. There is nothing on the second disk that I cannot move. Please don't ask why this wasn't setup from the start - I had no control over it.
So, what is the simplest way of getting around this single point of failure with the minimum of disruption to the service the box provides?
1) To implement hardware RAID using raidctl would require a re-install of the OS - I do not want to have to do this
2) Is it possible to create a new disk from the SAN, copy the boot areas etc and make then make the machine boot from the SAN?
3) Use solaris volume manager to implement some kind of software RAID on the second disk?
4) The boot disk is currently an ufs file system - could we convert this to zfs and then implement zpool mirroring without the need for a reinstall?
Many thanks

In my opinion, the simplest is option 3. Here's some instructions on how to accomplish:
http://wikis.sun.com/display/BigAdmin/Mirroring+root+With+Solaris+Volume+Manager+in+the+Solaris+9+and+10+OS
However, if I were in your position, I would do option 4. Use liveupgrade to convert to zfs and use zpool mirroring.

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0. c2t0d0 <DEFAULT cyl 38307 alt 2 hd 16 sec 255>
/pci@1e,600000/ide@d/dad@0,0
1. c2t1d0 <GNU Parted Custom cyl 9729 alt 0 hd 255 sec 63>
/pci@1e,600000/ide@d/dad@1,0
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admin@usrv-starbuck:~#
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Edited by: philo_neo on Mar 25, 2010 6:23 AM

Hi,
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Simplest way to protect the boot disk

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