Patch Name: PHCO_24198

Patch Description: s700_800 11.11 ioscan(1M) patch

Creation Date: 01/08/21

Post Date:  01/08/27

Hardware Platforms - OS Releases:
	s700: 11.11
	s800: 11.11

Products: N/A

Filesets:
	OS-Core.UX-CORE,fr=B.11.11,fa=HP-UX_B.11.11_32/64,v=HP

Automatic Reboot?: No

Status: General Release

Critical: No

Category Tags:
	defect_repair general_release manual_dependencies

Path Name: /hp-ux_patches/s700_800/11.X/PHCO_24198

Symptoms:
	PHCO_24198:
	1.( SR: 8606199426 CR: JAGad68613 )
	  "ioscan -k" takes a long time to complete on systems with
	  large configuration. For example, "ioscan -kf" would take
	  around 13+ minutes on a SuperDome system with 8000+ disks.

Defect Description:
	PHCO_24198:
	1.( SR: 8606199426 CR: JAGad68613 )
	  "ioscan -k" makes a discrete system call for each device
	  on the system. With a large system configuration, the
	  number of context switches between user space and the
	  kernel would be very large, resulting in a long execution
	  time for the command.
	Resolution:
	  New interfaces have been implemented in the kernel to
	  enable getting information for many devices through one
	  system call. "ioscan" now uses these new interfaces
	  delivered by kernel patch PHKL_24163
	  (or patches superseding it).

SR:
	8606199426

Patch Files:
	
	OS-Core.UX-CORE,fr=B.11.11,fa=HP-UX_B.11.11_32/64,v=HP:
	/sbin/ioscan

what(1) Output:
	
	OS-Core.UX-CORE,fr=B.11.11,fa=HP-UX_B.11.11_32/64,v=HP:
	/sbin/ioscan:
		ioscan.c $Date: 2001/06/18  $Revision r11.11/1 PATCH
			_11.11 (PHCO_24198)
		iosearch.c $Date: 2001/06/18  $Revision r11.11/1 PAT
			CH_11.11 (PHCO_24198)
		$ Version_11.11  Aug 18 2001 05:44:43 $

cksum(1) Output:
	
	OS-Core.UX-CORE,fr=B.11.11,fa=HP-UX_B.11.11_32/64,v=HP:
	806331244 233472 /sbin/ioscan

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies:
	Kernel patch PHKL_24163 (or its superseding patch)
	must be installed if "ioscan -k" performance improvement
	is desired.

Supersedes: None

Equivalent Patches:
	PHCO_24199:
	s700: 11.00
	s800: 11.00

Patch Package Size: 250 KBytes

Installation Instructions:
	Please review all instructions and the Hewlett-Packard
	SupportLine User Guide or your Hewlett-Packard support terms
	and conditions for precautions, scope of license,
	restrictions, and, limitation of liability and warranties,
	before installing this patch.
	------------------------------------------------------------
	1. Back up your system before installing a patch.

	2. Login as root.

	3. Copy the patch to the /tmp directory.

	4. Move to the /tmp directory and unshar the patch:

		cd /tmp
		sh PHCO_24198

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHCO_24198.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHCO_24198.  If you do not wish to retain a
	copy of the original software, use the patch_save_files option:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -x patch_save_files=false -s /tmp/PHCO_24198.depot

	WARNING: If patch_save_files is false when a patch is installed,
		 the patch cannot be deinstalled.  Please be careful
		 when using this feature.

	For future reference, the contents of the PHCO_24198.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHCO_24198.depot

	To put this patch on a magnetic tape and install from the
	tape drive, use the command:

		dd if=/tmp/PHCO_24198.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:
	PHCO_24198:
	Kernel patch PHKL_24163 or its superseding patch
	must be installed if "ioscan -k" performance improvement
	is desired.