Newbie troubleshooting question

[Jonathan Baker-Bates]

Hi - I've got an Linux RAID 1 setup under RedHat Enterprise, and
/proc/mdstat shows the following for one of the partitions:

md1 : active raid1 hdg3[1]
      178787264 blocks [2/1] [_U]

md0 : active raid1 hde2[0] hdg2[1]
      2048192 blocks [2/2] [UU]

md2 : active raid1 hde1[0] hdg1[1]
      104320 blocks [2/2] [UU]

I think this happened after a system crash and subsequent power-cycle we had
to do yesterday.

What's the recommended course of action to get the failed member back up?
Googling for the answer gets me a bit confused.

Thanks,

Jonathan