Backups/Mirroring

[Dan Brosemer <odin@skirnir.cleannorth.org>]

Data mirroring (I hesitate to call this backing up) occurs on a nightly
basis now.  All user files (Your U: drive), as well as the members share,
and the common share (P: drive) are mirrored nightly.  System files are
also mirrored to ease re-building the system if need be.

Three days' copies are kept, so if the system dies at the worst possible
moment, we have two days worth of data to call on to try to rebuild the
system.

The backup medium is still on-site, so a fire could wipe the whole thing
out... no roasting marshmallows by the server rack.

-Dan