LVM mirror failures

From: Isaac Lipkowitz (Isaac.Lipkowitz@uhi.ac.uk)
Date: Wed Mar 16 2005 - 06:48:47 EST


I've got a large Oracle 9i database setup using raw partitions.
 
The general configuration is mirrored stripes.
 
A few days ago, one disk failed. The rest of the stripe was OK and the
mirror was also OK.
 
For some reason, several other mirrors broke and some drives dropped
offline.
 
I've managed to reattach the drives and I'm resyncing the mirrors.
 
The Oracle database can't read the undotablespace do dbstart ends with
a forced shutdown.
 
Anybody got any ideas? Will I have to recreate the undo tablespace and,
if so, have I lost the entire database?
 
Will summarise.
 
Isaac Lipkowitz
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