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async I/O functions in HP-UX

Please give me some inoformation about how to use asynchronous I/O
functions properly(aio_read,aio_write etc.) in Unix.I am using HP-UX 10.30 .
Are there any restrictions applicable to aio related functions.I tried
one simple program using files & got the following error.

Unsupported file system operation(ENOSYS)

If possible please send me a sample code to enable me to try a simple
example using asynchronous I/O.

Please help

Regards
NewtonJJ

elfie

try "man 5 ioctl", and read some other (referred) man pages.

Concerning your ENOSYS, which call generated this error?

elfie

Can you share your simple program that generated this ENOSYS?
Preferable with an indication which call generated the error

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richardsonja

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