OnArchive questions

I have a few question about using OnArchive to backup SAP database. Hope anybody know the solution can help me to solve them. If I have setup volume set :LOGTAP with 3 tapes labelled LOGT1, LOGT2, LOGT3. and DBTAP with 3 tapes labelled DBT1, DBT2, DBT3. All tape expiry date is set to 1 day only. Everyday, I will use a DBTAP (archive database) tape and LOGTAP (logical log) tape. my archive command: onarchive 'archive/dbspaceset=*/vset=DBTAP/apart/level=0' my backup command: onarchive 'backup/logfile/continuous/nocurrent/vset=LOGTAP/expiry_date=0001-00:00:00' Q1. After all tapes in volume set DBTAP is used, the archive command prompt me to define a new volume. How can I reuse the old tapes (eg. DBT1) instead of adding a new volume to this volume set ? Q2. When I read the online.sapdev.id2.log message to monitor my backup logical log command, I found that the backup can automatically start when a new logically log is created. However, it will not automatically backup complete until I press ctrl+c. It seen different from ontape command 'ontape -c'. Is it normal ? Q3. According to SAP installation manual page 6-9 for the command :arcvolum ".. to replace a missing volume which already appears in the catalog list, you can simply enter the label of the volume you wish to replace." I tried, but I can't work. Although the label is entered, it seem to redefine a new volume appended to the existing volume set ??? Hardware :IBM RS/6000 AIX DataBase: SAP/R3 version 2.2E under Informix 6.0 Hope anyone know the answer can email to me. Thanks a lot! EricSze ericsze@cuhk.edu.hk