RAIDset problems on HSG80

Dear Managers,

I'm hoping someone can help me recover my system without having to 
restore from backups...?

We have a 2-node cluster (DS20 + ES40 + HSG80 storage, running Tru64 
5.1Pk3) and, after a planned shutdown for some power work, it won't boot!

The cluster was shut down cleanly, but the HSG80 was not shutdown before 
powering-off.  I now see that the RAIDset containing root1_domain, 
clu_quorum_dev, cluster_root, cluster_var, cluster_usr and root2_domain 
is in a peculiar state:

HSG> show raid10
Name          Storageset                     Uses             Used by
------------------------------------------------------------------------------

RAID10        raidset                        DISK11000        D101
                                              DISK21000        D102
                                              DISK31000        D103
                                              DISK41000        D104
                                              DISK51000        D105
                                              DISK61000        D106
         Switches:
           POLICY (for replacement) = BEST_PERFORMANCE
           RECONSTRUCT (priority) = NORMAL
           CHUNKSIZE = 256 blocks
         State:
           RECONSTRUCT 0% complete
           DISK11000 (member  0) is RECONSTRUCTING   0% complete
           DISK21000 (member  1) is RECONSTRUCTING   0% complete
           DISK31000 (member  2) is RECONSTRUCTING   0% complete
           DISK41000 (member  3) is RECONSTRUCTING   0% complete
           DISK51000 (member  4) is RECONSTRUCTING   0% complete
           DISK61000 (member  5) is RECONSTRUCTING   0% complete
         Size:             355486275 blocks
         Partitions:
           Partition number        Size               Starting Block 
  Used by
 
---------------------------------------------------------------------
             1                142193915 (  72803.28 MB)     74650880	D104
             2                 71096315 (  36401.31 MB)    216844800  D103
             3                 67545150 (  34583.11 MB)    287941120 
   D105
HSG>


There ought to be 6 partitions on there!

Can anyone suggest a recovery strategy other than re-creating the 
RAIDset and restoring from tape?  Might there be any mileage in 
deleteing and the re-creating the RAIDset without initialising, in the 
hope that the data will still be on the disks?

Many thanks,

Andrew

-- 
Dr. Andrew Raine, Head of IT, MRC Dunn Human Nutrition Unit,
Wellcome Trust/MRC Building, Hills Road, Cambridge, CB2 2XY, UK
phone: +44 (0)1223 252830   fax: +44 (0)1223 252835
web: www.mrc-dunn.cam.ac.uk email: [email protected]