Ioctl ASYNC_ADDSEG error, errno = 11 Trace Files on HP-UX

(Doc ID 1082185.1)

Last updated on MAY 24, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.5 [Release 10.2]
Information in this document applies to any platform.
***Checked for relevance on 29-DEC-2016***

Symptoms

On 10.2.0.4.3, HP-UX Itanium, Oracle doesn't open the /dev/async driver.

Trace files are generated with the below errors :

"Ioctl ASYNC_ADDSEG error, errno = 11"

Changes

Async IO has been configured according to documentation
(http://download.oracle.com/docs/cd/B19306_01/server.102/b15658/appb_hpux.htm#sthref691)

Privilegies for group dba:
sd900:rootsbrf:var/hpsupport getprivgrp dba
dba: RTPRIO MLOCK RTSCHED

Permissions on /dev/async :
sd900:rootsbrf:var/hpsupport ll /dev/async
crw-rw-rw- 1 oracle dba 101 0x000000 Feb 16 09:53 /dev/async

Cause

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