Are all bays created equal?

[MacSince1985]

I bought a few hard drives to fill the bays in my new Mac Pro. Does it matter which drive I put in which bay? I'm considering:
- access speed (are all bays accessed at the same time or are some prioritized?)
- cooling (which bays stay cooler because of their proximity to fans?)

In other words, is there a preferred bay to put faster, heavily accessed drives vs. slower back-up drives?

[Pressure]

Nope, they all are equal.

Put them in, in whatever order you feel like :)

[macz1]

The drives in the bays near the front of the computer stay a bit cooler, especially if you have many PCIe cards or a powerful GPU. But the difference is not very big.

[Shademaster]

Cool fact, if you have a software raid volume spread out over multiple HD's you can take ehm all out, swap ehm around and put them back in and they still work!