[Bacula-users] Volume Need to be changed unexpectedly!

[unaos <ur...@gm...>]

Hello Guys!  I need yoyr help or in i'll get out of my mind - bacula
volume rotation drives me crazy.
so, let's get to stuff:
Hardware: HP DAT 72
Software: app-backup/bacula-1.36.3-r3  USE="logrotate mysql readline
tcpd -X -bacula-clientonly -bacula-console -bacula-split-init -doc
-gnome -logwatch -postgres -sqlite -static -wxwindows"
OS: Gentoo Linux

the trouble: backup works fine, but approx. each month bacula wants
next tape! and the current is filled only on 51M of 72G!

here is pool defination from bacula dir:
Pool {
  Name = Default
  Pool Type = Backup
  Recycle = yes                       # Bacula can automatically recycle Volumes
  AutoPrune = yes                     # Prune expired volumes
  Volume Retention = 365 days         # one year
  Accept Any Volume = yes             # write on any volume in the pool
  LabelFormat = "Daily-"
  Maximum Volume Jobs = 0
  Maximum Volume Files =0
  Maximum Volume Bytes = 70 G
  Volume Use Duration = 1 year
}

i'm executing next sequence when recives message "30-Jun 13:13
buran-sd: Please mount Volume "Daily-0003" on Storage Device "DDS-4"
for Job Client1.2006-06-30_13.12.58"
in 'bconsole'
update->Volume parameters->Daily-0002 (current tape)->Volume Status->Append
then done and executing a job
30-Jun 14:01 buran-dir: Start Backup JobId 37, Job=Client1.2006-06-30_14.01.37
30-Jun 14:01 buran-sd: Volume "Daily-0002" previously written, moving
to end of data.
30-Jun 14:02 buran-sd: Client1.2006-06-30_14.01.37 Error: I canot
write on Volume "Daily-0002" because:
The number of files mismatch! Volume=35 Catalog=9
30-Jun 14:02 buran-sd: Marking Volume "Daily-0002" in Error in Catalog.

WTF ??
why tape fills only on 52 megs and why it can be used only for a month ?