RMAN backup failed: ORA-19502 & ORA-27072: File I/O error, rmanora-19502

RMAN backup failed: ORA-19502 & ORA-27072: File I/O error, rmanora-19502

When checking an ORACLE database's RMAN backup email in the morning, it was found that there were errors such as ORA-27072: File I/O error, the details are as follows:

channel ORA_DISK_1: starting piece 1 at 23-MAR-15

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03002: failure of backup plus archivelog command at 03/23/2015 03:48:02

ORA-19502: write error on file "/u04/backup/backupsets/ora_df875072537_s15615_s1", blockno 182657 (blocksize=8192)

ORA-27072: File I/O error

Linux-x86_64 Error: 9: Bad file descriptor

Additional information: 4

Additional information: 182657

Additional information: 700416

Recovery Manager complete.

Descriptions of ORA-03002 and ORA-27072 errors are as follows:

[Oracle @ DB-Server-03 ~] $ Oerr ora 1, 19502

19502,000 00, "write error on file \" % s \ ", blockno % s (blocksize = % s )"

// * Cause: write error on output file

// * Action: check the file

[Oracle @ DB-Server-03 ~] $ Oerr ora 1, 27072

27072,000 00, "File I/O error"

// * Cause: read/write/readv/writev system call returned error, additional

// Information indicates starting block number of I/O

// * Action: check errno

This error occurs in RMAN backup because the file I/O is incorrect when the backup set is generated. Due to insufficient/u04 partition space, RMAN backup cannot write data, we also received an email about disk partition alarms. As shown below.