Well after I ran metareplace with the submirrors that were in maintenance they came up okay again, and the ones that had been "last erred" changed to maintenance, so i ran metareplace -e again on...
Sorry to post a problem for my first post but I'm in a bit of a pickle at the minute!
I have an Ultra45 connected to a Storedge 3100 series, 2 internal, 2 external disks with a db...