Patch Name: PHKL_24908

Patch Description: s700_800 11.20 scsi_c8xx patch

Creation Date: 01/08/28

Post Date:  01/09/14

Hardware Platforms - OS Releases:
	s700: 11.20
	s800: 11.20

Products: N/A

Filesets:
	OS-Core.CORE2-KRN,fr=B.11.20,fa=HP-UX_B.11.20_64,v=HP

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_24908: CORRUPTION

Category Tags:
	defect_repair general_release critical corruption

Path Name: /hp-ux_patches/s700_800/11.X/PHKL_24908

Symptoms:
	PHKL_24908:
	( SR:8606198689 CR:JAGad67878 )
	Slow SCSI performance with greater than 5 devices.
	The output of iostat will show a blocks/per-second (bps)
	rate of less than 5 bps on a very active SCSI bus.

	( SR:8606204804 CR:JAGad73982 )
	SCSI performance can drop off if target responds
	with a queue full message to the initiator.

	Slow SCSI performance if the SCSI subsystem does not
	recover when the queue becomes full on a RAID box. The
	SCSI subsystem backs off on the number of I/O requests
	sent to the RAID box when a queue full message is
	returned by the RAID box. The performance of the RAID
	box will be slow until the system is rebooted.

	( SR:8606217441 CR:JAGad86593 )
	PCI bus error following repeated SCSI request
	timeouts.

	( SR:8606202338 CR:JAGad71512 )
	Read data corruption on u16000 systems with
	A5150A SCSI cards. The system could crash due to a
	bad file read. Data written to a SCSI device is not
	affected.

Defect Description:
	PHKL_24908:
	( SR:8606198689 CR:JAGad67878 )
	A boundary condition in the SCSI interface driver
	caused I/O requests not to be restarted under certain
	circumstances.

	Resolution:
	Boundary condition now handled properly.  I/O requests
	are restarted in a timely fashion to ensure best
	performance.

	( SR:8606204804 CR:JAGad73982 )
	SCSI services inadvertently turned off tagged command
	queuing when it received a Queue Full message from
	a target.

	Resolution:
	Fix SCSI services not to turn tag queuing off.

	( SR:8606217441 CR:JAGad86593 )
	A boundary condition in SCSI I/O Processor code
	corrupted an instruction when executing a SCSI abort.

	Resolution:
	Boundary condition now handled properly.  SCSI I/O
	Processor code reloads invalid pointer with a
	good value from a known location.

	( SR:8606202338 CR:JAGad71512 )
	Problem with interaction of DMA between
	LSI card and u16000 system.

	Resolution:
	The scsi_c8xx driver was modified to not use Memory
	Write Invalidate (MWI) mode on the u16000 server.
	This modification does not impact systems other than
	the u16000 server.

SR:
	8606198689 8606202338 8606204804 8606217441

Patch Files:
	
	OS-Core.CORE2-KRN,fr=B.11.20,fa=HP-UX_B.11.20_64,v=HP:
	/usr/conf/lib/libwsio-pdk.a(scsi_c8xx_pdk.o)
	/usr/conf/lib/libwsio.a(scsi_c8xx.o)
	/usr/conf/lib/libwsio.a(scsi_ctl.o)

what(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.20,fa=HP-UX_B.11.20_64,v=HP:
	/usr/conf/lib/libwsio-pdk.a(scsi_c8xx_pdk.o):
		scsi_c8xx_pdk.c $Date: 2001/08/09 07:52:32 $Revision
			: r11.20/2 PATCH_11.20 (PHKL_24908)
	/usr/conf/lib/libwsio.a(scsi_c8xx.o):
		scsi_c8xx.c $Date: 2001/08/09 07:52:32 $Revision: r1
			1.20/2 PATCH_11.20 (PHKL_24908)
	/usr/conf/lib/libwsio.a(scsi_ctl.o):
		scsi_ctl.c $Date: 2001/08/09 07:52:32 $Revision: r11
			.20/2 PATCH_11.20 (PHKL_24908)

cksum(1) Output:
	
	OS-Core.CORE2-KRN,fr=B.11.20,fa=HP-UX_B.11.20_64,v=HP:
	2916602698 12080 /usr/conf/lib/
		libwsio-pdk.a(scsi_c8xx_pdk.o)
	2829722687 270576 /usr/conf/lib/libwsio.a(scsi_c8xx.o)
	2785427356 323040 /usr/conf/lib/libwsio.a(scsi_ctl.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches: None

Patch Package Size: 620 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 PHKL_24908

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHKL_24908.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHKL_24908.  If you do not wish to retain a
	copy of the original software, include the patch_save_files
	option in the swinstall command above:

		-x patch_save_files=false

	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 PHKL_24908.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHKL_24908.depot

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

		dd if=/tmp/PHKL_24908.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None