What you really want is the NCR WorldMark 4380. Eight Pentium Pros, up to 8 GB of RAM (may support 16 GB with 512 MB DIMMs; they didn't exist when it came out,) 12 hot-swap 3.5" SCSI drive bays, 4 5.25" drive bays, 2-3 625W power supplies. (Yup, this puppy used less power than some ultra-high-end single-CPU desktops do today - the third PSU is only used for redundancy.) Not as many EISA (3 + 1 PCI/EISA shared,) but it has 15 (+1 shared) PCI slots, on four separate busses.
Optional INTERNAL UPS with 15 minutes of runtime at max load.
Take a look at the Product Guide, it brings a tear to my eye just remembering that monster.