One of the charms of blogging is that you get to make mistakes inpublic. So, I'll start off by saying that I have to retract some of whatI said in CSSvsTables , because a CSS column-based layout can be moreaccessible than a table-based one in some situations.

This is because one important part of accessibility is putting theimportant or changing content first in your raw HTML, and yournavigation and other boring stuff second (so that screen readers andother things that more or less

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