We had that problem at ADSM 3.1 on AIX 4.3.3 but only when we did a backup
of the archive logs...the full backups were fine.  We never managed to
resolve that problem we just stopped doing the archive log backups and are
now migrating to Tivoli Data Protection.
Becky Davidson
Data Manager/AIX Administrator
EDS/Earthgrains
voice: 314-259-7589
fax: 314-877-8589
email: becky.davidson AT egr DOT com