Well, it's been about 12 hours and I finally got some error messages. I disabled the automatic shutdown setting. The web interface doesn't show me much. It says there is an error, but doesn't point me to what the actual issue is that I can find.
Disk Management - RAID Setup says "An error in a RAID Array has been detected. Select restructuring disk and click `Restructuring RAID Array`." but nothing is selectable.
The front of the box shows no error lights at all. Got the blue light and the disks are green. I did get 5 email messages and this is what they say, in order I got them:
LinkStation Status Report:RAID Error Notification
RAID Error Notification
Target array
:RAID Array 1
(md2)
Disk(s) the error occurred
:UnknownDisk(sdd)
RAID array entered degrade mode.
LinkStation Status Report:DISK Error Notification
DISK Error Notification
HDD error occurred
Disk(s) the error occurred
:UnknownDisk()
(sdd) READ sector:1241285688 count:2
Disk writing error
RAID drive error will be repaired automatically.
Continuous backup is recommended.
LinkStation Status Report:DISK Error Notification
DISK Error Notification
HDD error occurred
Disk(s) the error occurred
:UnknownDisk()
(sdd) READ sector:1241285888 count:3
Disk writing error
RAID drive error will be repaired automatically.
Continuous backup is recommended.
LinkStation Status Report:DISK Error Notification
DISK Error Notification
HDD error occurred
Disk(s) the error occurred
:UnknownDisk()
(sdd) READ sector:1241285688 count:1
Disk writing error
RAID drive error will be repaired automatically.
Continuous backup is recommended.
LinkStation Status Report:DISK Error Notification
DISK Error Notification
HDD error occurred
Disk(s) the error occurred
:UnknownDisk()
(sdd) READ sector:1241285888 count:4
Disk writing error
RAID drive error will be repaired automatically.
Continuous backup is recommended.
LinkStation Status Report:RAID rebuild notice
RAID rebuild notice
Target array
:RAID Array 1
(md2)
Target disk
:UnknownDisk(sda)
RAID array rebuild is complete.