I think I may be on to something. I did a little digging and 'storport.sys' is at v5.2.3790.4173 which looks to be correct for a Win2003 R2SP2 x86 system.
However --- I checked the Dell PERC 6/i firmware/software and it's currently at v6.0.1-0080 (11/20/2007). It says the minimum should be 6.2.0-0012 (04/28/2009) and the latest is v6.3.3.0002 (05/17/2013).
Since we're not at the minimum firmware version -- it has a yellow alert in the Dell OpenManage Server Administrator page.
I'm going see if we can get the FW/SW up to date and/or P2V this old server to a VM to get rid of these hardware dependencies and issues. This should make the Balance alert go away too.