==========================================================================
The checksum's (found through sum -r) of the files that you have received
(other than this README) are as follows:

34174      1 patchSG0003900.idb
11107      2 patchSG0003900
19836     44 patchSG0003900.eoe_sw
==========================================================================



				  - 1 -



       1.  Patch_SG0003900_Release_Note

       This release note describes patch SG0003900 to IRIX 6.5.7.

       Patch SG0003900 replaces	no other patches.

       1.1  Supported_Hardware_Platforms

       This patch contains bug fixes for all hardware
       configurations.


       1.2  Supported_Software_Platforms

       This patch contains bug fixes for IRIX 6.5.7m and for IRIX
       6.5.7f.	The software cannot be installed on other
       configurations.

       1.3  Bugs_Fixed_by_Patch_SG0003900

       This patch contains fixes for the following bugs	in IRIX
       6.5.7.  Bug numbers from	Silicon	Graphics bug tracking
       system are included for reference.

	  o Bug	#780961	fsr_xfs	Corrupting database files

	    Fixed a bug	where the fsr_xfs(1M) command can
	    potentially	corrupt	data files on the system.

	    The	fsr_xfs	command	is used	by the system to defragment
	    files on XFS filesystems.  It can be invoked on
	    complete filesystems or on individual files.  As of
	    IRIX 6.5.7m/f, fsr_xfs is being invoked from the
	    fsr(1M) command and	this is	in turn	invoked	by default
	    from crontab(1) on all XFS filesystems.

	    A bug has been discovered where fsr_xfs miss handles
	    the	data of	large files that contain "holes".  Holes
	    are	gaps that XFS deliberately places in files that
	    represent spans of zeros in	the file without taking	up
	    disk space.

	    The	bug occurs when	these holes exist in files that	are
	    larger then	4 MBytes long and are defragmented by
	    fsr_xfs.  These files are commonly created by the
	    NetWorker backup and recovery software and can be
	    created by other applications as well.















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       1.4  Subsystems_Included_in_Patch_SG0003900

       This patch release includes these subsystems:

	  o patchSG0003900.eoe_sw.base


       1.5  Installation_Instructions

       Because you want	to install only	the patches for	problems
       you have	encountered, patch software is not installed by
       default.	 After reading the descriptions	of the bugs fixed
       in this patch (see Section 1.3),	determine the patches that
       meet your specific needs.

       If, after reading Sections 1.1 and 1.2 of these release
       notes, you are unsure whether your hardware and software
       meet the	requirements for installing a particular patch,	run
       inst.  The inst program does not	allow you to install
       patches that are	incompatible with your hardware	or
       software.

       Patch software is installed like	any other Silicon Graphics
       software	product.  Follow the instructions in your Software
       Installation Administrator's Guide to bring up the miniroot
       form of the software installation tools.

       Follow these steps to select a patch for	installation:

	 1.  At	the Inst> prompt, type

	     install patchSGxxxxxxx

	     where xxxxxxx is the patch	number.

	 2.  Initiate the installation sequence. Type

	     Inst> go

	 3.  You may find that two patches have	been marked as
	     incompatible.  (The installation tools reject an
	     installation request if an	incompatibility	is
	     detected.)	 If this occurs, you must deselect one of
	     the patches.

	     Inst> keep	patchSGxxxxxxx

	     where xxxxxxx is the patch	number.

	 4.  After completing the installation process,	exit the
	     inst program by typing











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	     Inst> quit



       1.6  Patch_Removal_Instructions

       To remove a patch, use the versions remove command as you
       would for any other software subsystem.	The removal process
       reinstates the original version of software unless you have
       specifically removed the	patch history from your	system.

       versions	remove patchSGxxxxxxx

       where xxxxxxx is	the patch number.

       To keep a patch but increase your disk space, use the
       versions	removehist command to remove the patch history.

       versions	removehist patchSGxxxxxxx

       where xxxxxxx is	the patch number.

       1.7  Known_Problems




































