Sybase DC35823-01-1500-04 manual Owner of the /dev/async directory, Select Modules, Where

		CHAPTER 3 Configuring the Operating System
	4	At the UNIX prompt, execute the following statements as “root”. The user
		ID of the user who is starting Adaptive Server and Backup Server must be
		the owner of the /dev/async directory.
HP-UX 11.23	This step is mandatory for HP users.
	To improve I/O performance on character or raw block devices, enable
	asynchronous I/O by installing the HP asynchronous I/O driver from SAM. For
	help with installing this driver, contact your operating system administrator or
	HP technical support.
	Note Before executing the following instructions, shut down Adaptive Server
	(or SQL Server).
	1	To launch the Kernel Configuration use kcweb -F.
	2	Select Modules.
	3	Select asyncdsk and change the next boot to static.
	4	Rebuild the kernel, and reboot the system.
	5	Execute the following commands using the userid root:
		#/etc/mknod/dev/async c 101 4
		#chmod 0660/dev/async
		#chown <uid> /dev/async
		#/etc/setprivgrp <ugrp> MLOCK
		Where:
		<uid> is the identification (user ID) used by the user that is booting
		Adaptive Server.
		<ugrp> is the user group for the sybase userid.
	6	At the UNIX prompt, execute the following statements as “root”. The user
		ID of the user who is starting Adaptive Server and Backup Server must be
		the owner of the /dev/async directory.
HP-UX on Itanium	To verify that the async I/O is active on the Itanium machine:
	1	Log in as root.
	2	Issue the command:
		# kcmodule -a grep aync
		Result: asyncdsk static required
		or you can also use the following:

Configuration Guide 39