Question: I lam trying to run an
RMAN backup and I am getting the ORA-19502 and ORA-27072
error:
ORA-19502: write error on file "/orabackup/rman/snlprod/control_files/c-225853591-20150315-01",
block number 320 (block size=16384)
ORA-27072: File I/O
error
Is this really a file I/O error or is it just not enough
disk spac for the backup? How to I get my RMAN backup
to complete?
Answer: This sounds like a
file-full or a disk I/O failure to me, Your first step
is to see if you have a "real" disk I/O error, and not
a phantom I/O error (as when the disk file is full), and the
OS logs will provide this information.
SQL> select * from
V$DATABASE_BLOCK_CORRUPTION;
This error is related to the
RMAN disk I/O failure.
The backup is attempting to write to a larger disk space
than is available. It can also happen when a 2
gigabyte file size has been reached.
Make sure oracle software owner (oracle user, by default)
at OS level has full permissions on the file system under
the new mount point. If everything is OK, configure the disk
channel explicitly and see if it works.
The reason
for this error is that there is not enough disk space on the
drive to complete the backup piece.
To resolve
this error, either clean up unnecessary files on the disk,
or add disk space to the disk then re-run the RMAN backup.
References: from Oracle technical support:
- MOSC Article 358535.1 - RMAN backup fails with
ORA-19502 and ORA-27072
-
MOSC Article 422530.1 - ORA-19502 ORA-27072 during
RMAN backup.
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