Sometimes I don't agree with maal when he is hard on newbies for not providing feedback on this forum, we all have work to do and I'm sure at times we may not always remember or have the time to reply ( winter Olympics on TV is my current excuse! ). Out of 14 questions about fairly new hardware systems started by this user, only once have they replied. I would say the best solution for this issue is to start a service call to Sun Support Services.
This was the suggestion that ericson_paula already got on comp.unix.solaris.
I disagree with Michael Vlain, seeing no indication that the robotic has failed.
Anyway Sun will send a complete unit. and the FE will swap the drives. (drive bad=keeping the "old" chasiis with new drive or robotic bad=new chassis and "old" drive").
Michael