On Dell Web Site about RH7.1 on PowerEdge Servers:
http://support.dell.com/us/en/kb/document.asp?DN=1058545
It looks like these systems have SCSI/hardware RAID capability. This could complicate things.
I'm a chicken; I like to back up my currentposition before I do something that could be rash.
Your can use BRU/CRU to make a "bare-bones" recovery set (tape and bootable diskettes). That's what I have our customers do at work, so I could provide additional help, if necessary. This isn't abad idea, just on general principles for emergency system recovery. Note that you can download an evaluation copy at their Web site; I think it has a 30 day expiration.
There is also an open source recovery option that supposedly handles SCSI (I haven't had time to try it yet). Mondo Rescue 1.45 (freshmeat.net) with Mindi Linux 0.65 (also freshmat.net) needed for the bootable diskette(s).
Now, since you have RH (and a 2.4 kernel) loaded, you already have Linux drivers for your devices. This, combined with the fact that I've seen good reviews of the upgrade mechanism for RH7.3, suggests that you will succeed.
