Hello..

I have the following situation:
1. I shutdown immediate the database
2. Took snapshot of database on Netapp filer
3. Backed the database snapshot up to tape using NDMP dump on a Netapp filer
4. Detroyed volume and recreated on Filer
5. Restored data from tape to new volume on filer
6. I renamed the controlfiles and erased the redo logs
7. I started the database up nomount
8. I ran my create contolfile script
9. I got the following error:
SVRMGR> connect internal
Connected.
SVRMGR> @control_ums7.sql
CREATE CONTROLFILE REUSE set DATABASE UMS7 RESETLOGS NOARCHIVELOG
*
ORA-01503: CREATE CONTROLFILE failed
ORA-01210: data file header is media corrupt
ORA-01110: data file : '/cognet-ums7/system/system01.dbf'
SVRMGR>

I did a dbv on the datafile and the undo header block of the system tablespace shows corruption. Oracle says it is because the tape had a bad spot on it. My manager thinks this is impossible. I do not agree with him. We do not have a backup solution and are solely relying on straight dumps to tape for our backups. He can't believe that there is no verification with NDMP!! I am very frustrated!! He is getting the tape verified to prove me wrong!! He wants to know how Oracle "knows" the tape is bad. I told him all Oracle "knows" is that the datafile is bad due to media corruption caused by somesort of hardware problem. There was no indication of corruption anywhere in my alertlog. Any ideas????? I need help!! This is nuts!!!

Thank you!!