Update: The Fujitsu drive in the EVMC definitely had bad spots. The Fujitsu Drive Diagnostic (now on Toshiba's drive site) found, and generously offered to repair, the affected sector(s). Fortunately, the bad sector(s) do not appear to have been in any critical data space, and once repaired, the drive imaged with no problem. I restored the image to a new drive, installed it and booted up, everything is working and even a handful of the message lights are still flashing on desksets. I hope they were flashing before I took it down.

Thanks to everyone for their help!!