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                          * * * READ ME * * *
            * * * Cluster Server Agents for SFCFS 8.0 * * *
                         * * * Patch 3800 * * *
                         Patch Date: 2025-11-11


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
----------
Cluster Server Agents for SFCFS 8.0 Patch 3800


OPERATING SYSTEMS SUPPORTED BY THE PATCH
----------------------------------------
SLES15 x86-64


PACKAGES AFFECTED BY THE PATCH
------------------------------
VRTScavf-8.0.0.3800


BASE PRODUCT VERSIONS FOR THE PATCH
-----------------------------------
   * InfoScale Enterprise 8.0
   * InfoScale Storage 8.0


SUMMARY OF INCIDENTS FIXED BY THE PATCH
---------------------------------------
Patch ID: 8.0.0.3800
* 4192210 (4177245) CVMVolDg resource takes many minutes to online with CPS fencing.
Patch ID: 8.0.0.3600
* 4162960 (4153873) Deport decision was being dependent on local system only not on all systems in the cluster
Patch ID: 8.0.0.2800
* 4118779 (4074274) DR test and failover activity might not succeed for hardware-replicated disk groups.
Patch ID: 8.0.0.2400
* 4112609 (4079285) CVMVolDg resource takes many minutes to online with CPS fencing.
* 4112708 (4054462) In a hardware replication environment, a shared disk group resource may fail to be imported when the HARDWARE_MIRROR flag is set.


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

Patch ID: 8.0.0.3800

* 4192210 (Tracking ID: 4177245)

SYMPTOM:
CVMVolDg resource takes many minutes to online with CPS fencing.

DESCRIPTION:
When fencing is configured as CP server based but not disk based SCSI3PR, Diskgroups are still imported with SCSI3 reservations, which causes SCSI3 PR errors 
during import and it will take long time due to retries.

RESOLUTION:
Code changes have been done to import Diskgroup without SCSI3 reservations when SCSI3 PR is disabled.

Patch ID: 8.0.0.3600

* 4162960 (Tracking ID: 4153873)

SYMPTOM:
CVM master reboot resulted in volumes disabled on the slave node

DESCRIPTION:
The Infoscale stack exhibits unpredictable behaviour during reboots, sometimes the node hangs to come online, the working node goes into the faulted state and sometimes the cvm won't start on the rebooted node.

RESOLUTION:
Now we have added the mechanism for making decisions about deport and the code has been integrated with an offline routine.

Patch ID: 8.0.0.2800

* 4118779 (Tracking ID: 4074274)

SYMPTOM:
DR test and failover activity might not succeed for hardware-replicated disk groups.

DESCRIPTION:
In case of hardware-replicated disks like EMC SRDF, failover of disk groups might not automatically succeed and a manual intervention might be needed. After failover, disks at the new primary site have the 'udid_mismatch' flag which needs to be updated manually for a successful failover.

RESOLUTION:
For DMP environments, the VxVM & DMP extended attributes need to be refreshed by using 'vxdisk scandisks' prior to import. VxVM has also provided a new vxdg import option '-o usereplicatedev=only' with DMP. This option selects only the hardware-replicated disks during LUN selection process.

Sample main.cf configuration for DMP managed hardware Replicated disks.
CVMVolDg srdf_dg (
CVMDiskGroup = LINUXSRDF
CVMVolume = { scott, scripts }
CVMActivation = sw
CVMDeportOnOffline = 1
ClearClone = 1
ScanDisks = 1
DGOptions = { "-t -o usereplicatedev=only" }
)
All 4 options(CVMDeportOnOffline, ClearClone, ScanDisks and DGOptions) are recommended with hardware-replicated disk groups.

Patch ID: 8.0.0.2400

* 4112609 (Tracking ID: 4079285)

SYMPTOM:
CVMVolDg resource takes many minutes to online with CPS fencing.

DESCRIPTION:
When fencing is configured as CP server based but not disk based SCSI3PR, Diskgroups are still imported with SCSI3 reservations, which causes SCSI3 PR errors during import and it will take long time due to retries.

RESOLUTION:
Code changes have been done to import Diskgroup without SCSI3 reservations when SCSI3 PR is disabled.

* 4112708 (Tracking ID: 4054462)

SYMPTOM:
In a hardware replication environment, a shared disk group resource may fail to be imported when the HARDWARE_MIRROR flag is set.

DESCRIPTION:
After the VCS hardware replication agent resource fails over control to the secondary site, the CVMVolDg agent does not rescan all the required device paths in case of a multi-pathing configuration. The vxdg import operation fails, because the hardware device characteristics for all the paths are not refreshed.

RESOLUTION:
This hotfix addresses the issue by providing two new resource-level attributes for the CVMVolDg agent.
- The ScanDisks attribute specifies whether to perform a selective for all the disk paths that are associated with a VxVM disk group. When ScanDisks is set to 1, the agent performs a selective devices scan. Before attempting to import a hardware clone or a hardware replicated device, the VxVM and the DMP attributes of a disk are refreshed. ScanDisks is set to 0 by default, which indicates that a selective device scan is not performed. However, even when ScanDisks is set to 0, if the disk group fails during the first import attempt, the agent checks the error string. If the string contains the text HARDWARE_MIRROR, the agent performs a selective device scan to increase the chances of a successful import.
- The DGOptions attribute specifies options to be used with the vxdg import command that is executed by the agent to bring the CVMVolDg resource online.
Sample resource configuration for hardware replicated shared disk groups:
CVMVolDg tc_dg (
    CVMDiskGroup = datadg
    CVMVolume = { vol01 }
    CVMActivation = sw
    CVMDeportOnOffline = 1
    ClearClone = 1
    ScanDisks = 1
    DGOptions = "-t -o usereplicatedev=on"
    )
NOTE: The new "-o usereplicatedev=on" vxdg option is provided with VxVM hot-fixes from 7.4.1.x onwards.



INSTALLING THE PATCH
--------------------
# rpm -Uvh VRTScavf-8.0.0.3800-SLES15.x86_64.rpm


REMOVING THE PATCH
------------------
# rpm -evh VRTScavf-8.0.0.3600-SLES15.x86_64


SPECIAL INSTRUCTIONS
--------------------
NONE


OTHERS
------
NONE