According to the ZFS documentation for the current official Solaris 10release (I don't know about the state of OpenSolaris builds, and they'renot of interest to us anyways), you cannot make a storage pool that is amirror of RAID-Z2 pools.

(You can indirectly construct a mirror of RAID-5 pools, by building theRAID-5 pools with the Solaris Volume Manager instead of ZFS itself.)

We want some form of RAID-6 instead of RAID-5 because

A lot of people like Google Mail, and it's not hard to see why; theyhave the best webmail interface, offer lots of storage, and so on. Sowhy not just cut to the chase and make our users happy by outsourcingour email to Google Mail?

The answer in a nutshell is that we'd like a Google Mail Appliance, butthe university is not in any position to make Google Mail our emailprovider.

There's a bunch of pragmatic reasons why outsourcing email would be

It's an article of faith in modern web page creation that using tablesfor layout, especially column-based layout, is an evil hack and thatusing CSS instead is virtuous, proper, and accessible. (These peopleprobably turn up their noses at WanderingThoughts ' table-based layout,which has its reasons .)

I have news for these people: it isn't so. Using CSS floats for layoutis still using a hack. In fact, it's using a worse hack; at least