ORA-27061: waiting for async I/Os failed
                                                 Last update (2008-05-14 10:27:15)
                                                                                                                   Date added (2008-05-14 10:18:23)

Summary
If you are in Oracle Server - Enterprise Edition - Version: 10.2.0.1 and operating system HP-UX PA-RISC (64-bit) and have set:

disk_asynch_io = TRUE and sga_target > 4G
then the instance fails to startup with error:
ORA-27061: waiting for async I/Os failed

By setting disk_asynch_io = FALSE you can bypass the problem, but you cannot work efficient.

Workaround:It is better to set sga_target = 3728MB to startup the instance

Solution: There is a one-off patch (Patch 4709673) available for Oracle 10.2.0.1
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