* * * READ ME * * *
                  * * * Symantec File System 6.1 * * *
                      * * * Patch 6.1.0.100 * * *
                         Patch Date: 2014-02-09


This document provides the following information:

   * PATCH NAME
   * OPERATING SYSTEMS SUPPORTED BY THE PATCH
   * PACKAGES AFFECTED BY THE PATCH
   * BASE PRODUCT VERSIONS FOR THE PATCH
   * SUMMARY OF INCIDENTS FIXED BY THE PATCH
   * DETAILS OF INCIDENTS FIXED BY THE PATCH
   * INSTALLATION PRE-REQUISITES
   * INSTALLING THE PATCH
   * REMOVING THE PATCH


PATCH NAME
----------
Symantec File System 6.1 Patch 6.1.0.100


OPERATING SYSTEMS SUPPORTED BY THE PATCH
----------------------------------------
RHEL6 x86-64


PACKAGES AFFECTED BY THE PATCH
------------------------------
VRTSvxfs


BASE PRODUCT VERSIONS FOR THE PATCH
-----------------------------------
   * Symantec File System 6.1
   * Symantec Storage Foundation 6.1
   * Symantec Storage Foundation Cluster File System HA 6.1
   * Symantec Storage Foundation for Oracle RAC 6.1
   * Symantec Storage Foundation HA 6.1


SUMMARY OF INCIDENTS FIXED BY THE PATCH
---------------------------------------
Patch ID: 6.1.0.100
* 3418489 (3425878) Performance degradation is seen with Smart IO feature enabled


DETAILS OF INCIDENTS FIXED BY THE PATCH
---------------------------------------
This patch fixes the following Symantec incidents:

Patch ID: 6.1.0.100

* 3418489 (Tracking ID: 3425878)

SYMPTOM:
I/O's pause periodically resulting in performance degradation. No 
explicit error is seen

DESCRIPTION:
To avoid kernel stack overflow, work consuming a large amount of 
stack space is not done in the context of the original thread.  Instead such 
work items are added to a high priority work queue for processing by a set of 
worker threads. In the case where all worker threads are busy, there is an issue 
where newly queued work may be subjected to an additional delay in processing 
which results in periodic stalls.

RESOLUTION:
High priority work items are processed by a set of dedicated worker 
threads. These dedicated threads do not have an issue when all threads are busy; 
so do not trigger periodic stalls.



INSTALLING THE PATCH
--------------------
Run the Installer script to automatically install the patch:
-----------------------------------------------------------
To install the patch perform the following steps on at least one node in the cluster:
1. Copy the hot-fix fs-rhel6_x86_64-6.1.0.100-rpms.tar.gz to /tmp
2. Untar fs-rhel6_x86_64-6.1.0.100-rpms.tar.gz to /tmp/hf
    # mkdir /tmp/hf
    # cd /tmp/hf
    # gunzip /tmp/fs-rhel6_x86_64-6.1.0.100-rpms.tar.gz
    # tar xf /tmp/fs-rhel6_x86_64-6.1.0.100-rpms.tar
3. Install the hotfix
    # pwd /tmp/hf
    # ./installVRTSvxfs610HF100 [<host1> <host2>...]

Install the patch manually:
--------------------------
Please refer to "Performing the upgrade" section of the SFHA/SFCFSHA/SFRAC installation guides for detailed instructions.

The patches can be installed using the native commands as follows. 

for e.g.
Please select appropriate operating system.
#rpm -Uvh VRTSvxfs-6.1.0.100-SLES11.x86_64.rpm
#rpm -Uvh VRTSvxfs-6.1.0.100-RHEL6.x86_64.rpm
#rpm -Uvh VRTSvxfs-6.1.0.100-RHEL5.x86_64.rpm

Please ensure the pre-installation and post installation steps are followed as per the performing upgrade section.


REMOVING THE PATCH
------------------
# rpm -e <rpm-name>


SPECIAL INSTRUCTIONS
--------------------
vxodm service can be restarted after loading new VxFS module, if it is not loaded automatically. 

# /etc/init.d/odm restart


OTHERS
------
NONE