DegradedArray event on FC3 after power failure

[Mark]

Hi,

I have a software RAID-1 (2 IDE drives) configuration on a Fedora Core 3 box.
After a power-failure took it down unclean, I got the below email during reboot:

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This is an automatically generated mail message from mdadm running on <SERVERNAME>

A DegradedArray event had been detected on md device /dev/md0.

Faithfully yours, etc.
------------------------------------


/proc/mdstat says this:

# less /proc/mdstat
Personalities : [raid1]
md0 : active raid1 hda3[1]
      193157440 blocks [2/1] [_U]

unused devices: <none>
------------------------------------


Does anybody have any pointer on what to do to fix this?

What does the mdstat result really mean?

Thanks,

MARK