ORA-00372 error after DB backup

Question

Hello,
After performing a backup on tape using Amanda, one of the tablespaces is generating an ORA-00372 error. The DB is 10g1, on Solaris' SunOS 5.10.
ORA-01110: data file 6: '[path]/filename.dbf'
ORA-00372: file 6 cannot be modified at this time
ORA-01110: data file 6: '[path]/filename.dbf'
While trying to log in sqlplus as a regular user, I get the ORA-01033 message:
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
I can log in as sysdba, to find out that the DB is only mounted, when I issue an 'alter database open;' I get the 00372 error above.
The RMAN backup sequence was the following:
run {
allocate channel ch1 type disk;
backup
incremental
level=0
database;
release channel ch1;
After the backup, the state of the DB was not checked, but some application process that used it stopped responding, so after trying to restart the process, a reboot command was issued from a shell - I don't know if this has anything to do with the actual state of the DB.
- What can I do to get the DB to the open state ('alter tablespace ... online' doesn't work with the DB in mounted state)?
- What possibly generated this particular situation?
Thank you all for any ideas,
Adrian

Answer 1

I tried to retrieve the status of the tablespaces with the following query
select     TABLESPACE_NAME, STATUS, CONTENTS
from      dba_tablespaces
order      by TABLESPACE_NAME
but I cannot run it, as the DB is only mounted - I get the error:
ORA-01219: database not open: queries allowed on fixed tables/views only
Is there another way to find out? And I don't know how to find the status of the file...