When a maildb is over quota and system compact the db, system crash the structure of the db.
See below logs :
02/03/2009 19:43:25 Informational, database design compression is enabled in database mail\xxx.nsf.
02/03/2009 19:43:25 Informational, document data compression is enabled in database mail\xxx.nsf.
02/03/2009 19:43:25 Informational, LZ1 is enabled in database mail\xxx.nsf.
02/03/2009 19:43:25 Compacting mail\xxx.nsf (xxx)
02/03/2009 19:44:06 Unable to write to database - database D:\Program Files\Lotus\Domino\data\mail\xxx84.TMP would exceed its disk quota of 102400 KB by 22 MB.
02/03/2009 19:44:07 Rebuild UNID index in database D:\Program Files\Lotus\Domino\data\mail\xxx84.TMP
02/03/2009 19:44:09 Compacted mail\xxx.nsf, 1594K bytes recovered (1%)