I recently "inherited" support for a linux system running RedHat 7.3. I'm not a linux pro, as my main area is applications development/support. I get the feeling, though, that I should upgrade this old version. Before I launch off bravely, I just want to know some basics: Is 9.0 the best choice? Should I go with Enterprise? Will I be able to upgrade "in place" without losing partitions/data on hard drive? Finally, the hard drive is RAID1 - I seem to remember from my predecessor that 7.3 didn't work with the RAID controller "out of the box." Am I wrong to assume that 9.0 (or whatever) will be better?
A lot of questions, I realize, but I sincerely appreciate any help. I can get other system info, if needed.