Input/output errors

I have the following error:

ERROR at line 1:
ORA-01115: IO error reading block from file 2 (block # 2772)
ORA-01110: data file 2: '/home5/oracle/oradata/lrec_ts_files/lrec.dbf'
ORA-27091: skgfqio: unable to queue I/O
ORA-27072: skgfdisp: I/O error
Linux Error: 5: Input/output error
Additional information: 2771

I have the following error:

ERROR at line 1:
ORA-01115: IO error reading block from file 2 (block # 2772)
ORA-01110: data file 2: '/home5/oracle/oradata/lrec_ts_files/lrec.dbf'
ORA-27091: skgfqio: unable to queue I/O
ORA-27072: skgfdisp: I/O error
Linux Error: 5: Input/output error
Additional information: 2771

It looks to me like the database is having problems performing I/O on the file '/home5/oracle/oradata/lrec_ts_files/lrec.dbf.' There are a few causes for this.

The OS cannot perform I/O on the disk volume. Try the following:
```
   cd /home5/oracle/oradata/lrec_ts_files
   ls -l
```
If you can do a directory listing, then the OS can see this volume just fine. If not, then you will have to resolve the OS issue as this is not a database problem.
The datafile is bad for some reason. You can use the dbverify utility to see if the datafile is corrupt. If the datafile is bad, restore it from a backup.
There is a bad spot on your disk. The dbverify utility should report this condition.

This was last published in August 2005

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