New tricks for XFS

I find "being a pack rat with more cases and motherboards lying about than is reasonable" seems to work acceptably well ;). The odd number of disks is a bit trickier.

> I was thinking of putting Lustre on it as a way to split the metadata onto the MMC and the data onto the big machine over the 10GbE :)

Good heavens. That's a dedication to complexity! I'm moving my performance-sensitive Gluster FSes to use tiering, so I'm in no position to criticise, though.

> imagine my surprise to find that managed switches with a couple of 10GbE ports on have plunged in price to under £200 nowadays

The plunging price of network equipment continues to astonish me. They days where just management was a prohibitively expensive option are long gone, and I'm loving it.