I am more acquainted with the Solaris side of Unix and learning the ropes on Linux. How does one go about discovering what kind of HBAs are installed on a redhat box. This is what I see under /proc/scsi

# ls -l scsi
total 0
-r--r--r-- 1 root root 0 Jan 5 13:30 device_info
-r--r--r-- 1 root root 0 Jan 5 13:30 scsi
dr-xr-xr-x 2 root root 0 Jan 5 13:30 sg

# ls -l scsi/sg
total 0
-rw-r--r-- 1 root root 0 Jan 5 13:31 allow_dio
-r--r--r-- 1 root root 0 Jan 5 13:31 debug
-rw-r--r-- 1 root root 0 Jan 5 13:31 def_reserved_size
-r--r--r-- 1 root root 0 Jan 5 13:31 device_hdr
-r--r--r-- 1 root root 0 Jan 5 13:31 devices
-r--r--r-- 1 root root 0 Jan 5 13:31 device_strs
-r--r--r-- 1 root root 0 Jan 5 13:31 version

I don't see any references to Emulex or Qlogic, which is typical for most HBAs (at least in our environment).

HBA info is reported by the kernel at boot time, so you could check the output of dmesg. After a long enough period of time / series of events, that ring buffer gets overwritten, though.

The next idea would be to try:
# lspci -v

Pipe the output to the less pager so that you can poke through it and find your HBA.