Oracle Message ORA-27091 - unable to queue I/O

ERRORunable to queue I/O
CAUSEread/write/readv/writev system call returned error, additional information indicates starting block number of I/O
ACTIONcheck errno

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980152DB reports I/O error after inst of AIX 5.3 TL 05, 06, 07, 08
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546006Problems with Oracle due to operating system errors