Tape backups are failing with intermittent "status 84's" when MSEO is configured for tape drives. The bptm log reports position check errors followed by "too many data blocks written". Backups run fine when MSEO is disabled
MSEO encryption driver does not use the tape drive passthru device.
We needed to create the touch file "/usr/openv/netbackup/db/config/DISABLE_IMMEDIATE_WEOF" on the media server(s) in question as the MSEO driver does not make use of the passthru device. Once this change was in place, the backups have been working fine since.
# cat -s /usr/openv/netbackup/version
VERSION NetBackup 188.8.131.52
RELEASEDATE Wed Dec 07 20:38:17 CST 2011
# cat -s /usr/openv/netbackup/bin/version
# /bin/uname -a
Linux media 2.6.18-194.26.1.el5 #1 SMP Fri Oct 29 14:21:16 EDT 2010 x86_64
x86_64 x86_64 GNU/Linux
# ./agent/bin/MseoVersion -v
MSEO Agent version: 6.1.6
# ./agent/bin/MseoVersion -r
Built on Jul 6 2011 at 19:29:15
Red Hat Enterprise Linux Server release 5.5 (Tikanga)