How could complete reinstall of Solaris 10 affect current Oracle install

  We currently run Oracle V 10.2.0.3 with a few patches, and it is very stable. Our OS is Solaris 10, Generic_118833-36 patch level.

The Unix Ops group has increasingly reported various hardware and OS problems over the past year, to the point where they would like to now get the latest Solaris 10 distribution and do a total reinstall of the OS. They actually started to do that last Sunday on a second file system....if that had completed, they would have swapped the old with the new, and we would all ride off into the sunset. I thought that at most, I would just relink the executables and everything would be okay.