In <1995Jan3.214410.20216 AT draper DOT com>, URMM AT vm.marist DOT edu (Martha 
McConaghy) writes:
>Well, this past weekend, our annual holiday event occured, we had a
>head-crash.  For some, unknown reason, Thanksgiving/Christmas/New Year's
>is the season when our DASD bite the dust.  No one can explain this
>phenom, but more than one IBM CE has spent his/her holiday with us.  (They
>have to draw straws now to see who will answer our call.)  Maybe I should
>call the producers of the "X Files"...%-)
>
>In any case, one of the disks trashed was the mirror disk for the database
>catalog (301).  The primary disk is OK and none of the other volumes were
>affected.  My question is, what is the best way to recover it?  Can I just
>DDR (I'm running a VM/ESA server) copy the main disk to the mirror or will
>this cause painful consequences?  Is there some other way of getting this
>disk?  Right now the server gives the following errors:
>
>ANR5014E Unable to open disk 0301 - error 113 received from DISKID
>ANR9999D LVMINIT(802): Unable to add disk '0301' to disk table.
>ANR9999D LVMINIT(508): Unable to read a valid set of LVM Data Tables from
>any defined disk
>
>Then the server terminates.  As a last resort, I can restore the entire
>server, including the data.  However, several people will lose important
>backups if I do, which is far from desirable.
>
>Any suggestions would be appreciated.
>Martha
>
I run an MVS server so I can't give specific help.  What I want to say
is that this kind of failure is exactly why the product has mirrors,
so it is very disappointing that you can't restart!

I have done a little bit of testing of this feature, but I don't
remember the details.  Try having '0301' completely gone from the
system.  If that fails, have '0301' online but without the adsm db
file on it.  Next try allocating the file.  That is as far as it
can go.  What should happen is that the server will start and put the
bad mirror offline.  Then if the file exists, you can 'vary' it on
line and it will resyncronize.

What level of the server code are you running?  Good luck!
Please let us know how it works out.  As I said, this shouldn't be
happening!

Bill Colwell
C. S. Draper Lab
Email: BColwell AT draper DOT com
Voice: 617-258-1550