Patch Name: PHCO_26917

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

Creation Date: 02/05/01

Post Date:  02/06/11

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

Products: N/A

Filesets:
	LVM.LVM-RUN

Automatic Reboot?: No

Status: General Release

Critical:
	Yes
	PHCO_26917: CORRUPTION
	PHCO_18837: CORRUPTION

Path Name: /hp-ux_patches/s700_800/10.X/PHCO_26917

Symptoms:
	PHCO_26917:
	When using estendfs_hfs to enlarge a file system in
	which there are some symbolic links, extendfs exits
	with errors and the file system is corrupted. Users
	will see the following messages:

	read error: XXXXXXX
	rdfs: No such device or address

	PHCO_18837:
	When using extendfs_hfs to enlarge a file system with
	a fragment size that is not 1K bytes, the directory
	of the mount point becomes corrupted. This causes the
	error message ". not found" to be issued when an
	attempt is made to mount the file system.

	PHCO_10578:
	When trying to use extendfs to create/enlarge to
	a large hfs file system, extendfs would appear to work,
	but print the message
		ERROR -- we are writing to the wrong fragments
	and the file system would be corrupted.  This problem
	is seen only for extending file systems larger than
	40GB.

	PHCO_8549:
	When trying to use extendfs to create/enlarge to
	a large hfs file system, extendfs would appear to work,
	but print the message
		ERROR -- we are writing to the wrong fragments
	and the file system would be corrupted.

Defect Description:
	PHCO_26917:
	Extendfs_hfs mistakes some symbolic links for a device
	address. This causes routine of rdfs() to read incorrect
	data from the device.  The file system is corrupted after
	that.

	Resolution:
	Modify extendfs codes to handle each type of symbolic
	links correctly.

	PHCO_18837:
	When the 'cylinder group summary information' needs to
	be re-written (due to an increase in size), the incorrect
	number of fragments required is calculated when the
	fragment size is not 1K bytes.
	This causes the data in the first data block, which
	includes the current directory entry "." in the mount
	directory, to be lost.

	Resolution:
	The correct number of fragments required is calculated,
	regardless of the fragment size.

	PHCO_10578:
	When extending the cylinder area needed for large file
	systems, extendfs could possibly corrupt the file system
	while enlarging it, forcing the customer to either
	fsck and restore the file system, or possibly need to
	do a newfs.

	PHCO_8549:
	When extending the cylinder area needed for large file
	systems, extendfs could possibly corrupt the file system
	while enlarging it, forcing the customer to either
	fsck and restore the file system, or possibly need to
	do a newfs.

SR:
	8606247100 8606249832 1653271262 5003361394 5003335547

Patch Files:
	/sbin/fs/hfs/extendfs

what(1) Output:
	/sbin/fs/hfs/extendfs:
		$Revision: 78.1.1.4 $
		$Revision: 76.7.1.4 $
		PATCH-PHCO_18644 for 10.20; for 10.30, 11.x compatib
			ility libc.a_ID@@/main/r10dav/libc_dav/libc_
			dav_cpe/9
		/ux/core/libs/libc/archive_pa1/libc.a_ID
		Jul  8 1999 15:44:31
		PATCH_10_20: extendfs.o ufs_tables.o hpux_rel.o 02/0
			5/01

cksum(1) Output:
	362532091 159744 /sbin/fs/hfs/extendfs

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHCO_8549 PHCO_10578 PHCO_18837

Equivalent Patches: None

Patch Package Size: 210 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_26917

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHCO_26917.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHCO_26917.  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_26917.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_26917.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None