Patch Name: PHCO_17275

Patch Description: s700_800 10.20 savecore(1M) cumulative patch

Creation Date: 99/01/08

Post Date:  99/01/12

Hardware Platforms - OS Releases:
	s700: 10.20
	s800: 10.20

Products: N/A

Filesets:
	OS-Core.UX-CORE

Automatic Reboot?: No

Status: General Release

Critical:
	No (superseded patches were critical)
	PHCO_12822: OTHER
		Configurations that use greater than 2GB dump
		devices will not be able to access system dump data
		without this patch.

Path Name: /hp-ux_patches/s700_800/10.X/PHCO_17275

Symptoms:
	PHCO_17275:
	On large memory systems that use dedicated dump devices,
	savecore may fail with a "Broken pipe" error in the INDEX
	file.  The messages in the INDEX file are:
	warning   savecore: running in the background
	error     savecore: write failed <file path>: Broken pipe
	warning   savecore: only ##### of ##### bytes saved.

	PHCO_12822:
	If the dump area is beyond 2Gb on the physical disk, the
	following error message results when savecore attempts to
	read the dump:
	savecore: seek failed <dump device>: <random error message>
	savecore: could not open dump

Defect Description:
	PHCO_17275:
	On large memory systems using dedicated dump devices,
	savecore puts itself into the background and protects itself
	from the RC scripts terminating by ignoring SIGHUP.  When a
	compression process is spawned, the handling of SIGHUP is
	returned to the default (terminate the process).  When the
	RC scripts completed, the compression process catches the
	hangup signal and terminates.  Savecore detects this as a
	broken pipe as it tries to write data out to the compression
	process.

	PHCO_12822:
	When the size of a dump device is greater than 4Gb, savecore
	cannot access the dump.  The savecore command will fail
	with:
	    savecore: seek failed <dump device>: <error message>
	    savecore: could not open dump
	The <error message> will tend to be random as savecore is
	reporting an error that did not really occur.

SR:
	5003445130 5003387886 1653230540

Patch Files:
	/sbin/savecore

what(1) Output:
	/sbin/savecore:
		PHCO_17275 $Revision: 78.3.1.6 $
		PATCH-PHCO_16303 for 10.20; for 10.30, 11.x compatib
			ility libc.a_ID@@/main/r10dav/libc_dav/libc_
			dav_cpe/8
		/ux/core/libs/libc/archive_pa1/libc.a_ID
		Sep 11 1998 16:54:45
		PATCH_10_20: hpux_rel.o main.o args.o source.o targe
			t.o util.o disk_area.o module.o image.o inde
			x.o compress.o tape.o 99/01/08

cksum(1) Output:
	1177816844 221184 /sbin/savecore

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHCO_12822

Equivalent Patches: None

Patch Package Size: 270 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_17275

	5a. For a standalone system, run swinstall to install the
	    patch:

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHCO_17275.depot

	5b. For a homogeneous NFS Diskless cluster run swcluster on the
	    server to install the patch on the server and the clients:

		swcluster -i -b

	    This will invoke swcluster in the interactive mode and
	    force all clients to be shut down.

	    WARNING: All cluster clients must be shut down prior to the
		     patch installation.  Installing the patch while the
		     clients are booted is unsupported and can lead to
		     serious problems.

	    The swcluster command will invoke an swinstall session in which
	    you must specify:

		alternate root path  -  default is /export/shared_root/OS_700
		source depot path    -  /tmp/PHCO_17275.depot

	    To complete the installation, select the patch by choosing
	    "Actions -> Match What Target Has" and then "Actions -> Install"
	    from the Menubar.

	5c. For a heterogeneous NFS Diskless cluster:

		- run swinstall on the server as in step 5a to install
		  the patch on the cluster server.

		- run swcluster on the server as in step 5b to install
		  the patch on the cluster clients.

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHCO_17275.  If you do not wish to retain a
	copy of the original software, you can create an empty file
	named /var/adm/sw/patch/PATCH_NOSAVE.

	Warning: If this file exists when a patch is installed, the
	         patch cannot be deinstalled.  Please be careful
		 when using this feature.

	It is recommended that you move the PHCO_17275.text file to
	/var/adm/sw/patch for future reference.

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

		dd if=/tmp/PHCO_17275.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None