[HECnet] A2RTR downtime

A2RTR will be down tomorrow (Monday) for a couple of hours sometime between 9AM PDT and 3PM. It's not my doing - PG&E is replacing a transformer and the power will be off. I have battery backup for some of my equipment, but not A2RTR. Sorry. It's also going to have to go down sometime again, maybe next weekend, so I can replace a disk drive that's failing. I bought two identical drives and plan to set up a RAID 1 array this time. If anybody has set up a software RAID on Ubuntu, using the md driver and mdadm, for the system drive and you have advice, let me know. Espcially if you managed to make both of the drives bootable. Bob