RAID Support - more
To see how the TS-209 performed when a disk failure occurred, I opened up the front panel and yanked out a drive while everything was up and running. The first reaction from the unit was the disk LED on the front panel turning off. Then, a red flashing LED appeared, and the TS-209 beeped twice. Shortly thereafter, I received an email notice telling me that a drive had been removed.
These are the kind of notifications I want to see, and are in contrast to the Iomega 1 TBStorCenter Network Hard Drive I tested recently that gave me no indication at all that anything had gone wrong when I yanked a drive. A check of the disk status screen showed that I was now running in "degraded" mode, and a check of my network shares showed that all of my data was intact and available.
Next, I ran a test to see how well it recovered when the drive was replaced. When Ihot-plugged the drive back in, the disk LED turned on, two more beeps sounded, and the red LED changed to an alternating red/green flashing mode. Once again I received an email, this time telling me that a drive had been added to the system. The disk status screen now showed that the TS-209 automatically had gone into a "rebuilding" mode.
As before, my original data was still available during this rebuilding process. After around 75 minutes, the rebuild completed and the unit returned to a normal state. All in all, the process was very well done, and about as painless as you could hope. The only quibble I had was the lack of a final email telling me that the rebuild was complete, but this is a minor detail.