DELL EMC PowerFlex 3.6.0.5 Release Notes Owner’s Manual

DELL EMC PowerFlex 3.6.0.5 Release Notes

Product Information

Specifications:

• Release Version: 3.6.0.5
• Release Date: August 8, 2022

Product Description:

PowerFlex is a software-defined storage platform designed to significantly reduce operational and infrastructure complexity. It empowers organizations to move faster by delivering flexibility, elasticity, and simplicity with predictable performance and resiliency at scale.

New and Changed Features:

PowerFlex 3.6.0.5 introduces the following new features:

• PowerFlex is now available as a consumption model in the public cloud.
• PowerFlex 3.6.0.4 is supported on AWS.
• PowerPath 7.4 for Linux now supports PowerFlex devices.
• PowerPath Migration enabler can be used for data migration across PowerFlex and other PowerPath supported storage array  classes.

Important Considerations:

Before deploying or upgrading your system to PowerFlex 3.6.0.5, please take note of the following aspects:

1. Network resiliency improvements: Proactive network path error detection requires SDC to be at v3.6 or later.
2. Upgrade Paths:
   • Upgrade from PowerFlex version 3.0.x and 3.5.x to version 3.6 is supported.
   • Older PowerFlex/VxFlex OS versions must be upgraded to version 3.0.x prior to upgrading to version 3.6.
3. vSphere plug-in End-of-Support-Life:
   • The PowerFlex vSphere plug-in continues to be supported with vSphere versions 6.5 and 6.7.
   • However, it reaches end-of-support-life when vSphere 6.5 and 6.7 reach end-of-support by VMware.
   • The PowerFlex vSphere plug-in does not support vSphere 7 hyperconverged (HCI) configurations.

Changed Features:
No features were changed in PowerFlex 3.6.0.5.

Updated Operating System Support Matrix:
There are no changes to operating system support in this  release. For more operating system-related information and supported components, refer to the PowerFlex simple support matrix.

Oracle JRE and OpenJDK Support:

• Oracle JRE 1.8 build 322
• OpenJDK JDK 8 build 322.b06
• OpenJDK 11.0.12.07 (Linux-based servers only)

Support Deprecation:

The following features are no longer supported in PowerFlex 3.6.0.5:

• Background scanner events and alerts: Some events and alerts for the background scanner feature were deprecated and replaced with different ones. See the PowerFlex v3.5.1.2 Release Notes, Documentation section, for details.
• DAS Cache: DAS Cache is no longer supported for PowerFlex running on any operating systems.
• System Analysis Tool: The System Analysis Tool is no longer included in PowerFlex.
• AMS: Systems managed by AMS system will not be able to upgrade to PowerFlex v3.5 or later. Prior to performing an upgrade, contact  PowerFlex Product Management for possible alternatives.

FAQ:

• Q: Can I upgrade directly from older PowerFlex versions to 3.6.0.5?
  A: Yes, upgrade from PowerFlex version 3.0.x and 3.5.x to version 3.6 is supported. However, older PowerFlex/VxFlex OS versions must be upgraded to version 3.0.x before upgrading to version 3.6.

• Q: Does the PowerFlex vSphere plug-in support vSphere 7  hyperconverged (HCI) configurations?
  A: No, the PowerFlex vSphere plug-in does not support vSphere 7 hyperconverged (HCI) configurations.

• Q: Where can I find the PowerFlex simple support matrix?
  A: The PowerFlex simple support matrix can be found at https://elabnavigator.dell.com/eln/modernHomeSSM.

PowerFlex 3.6.0.5
Rev. 01
August 2022
These release notes contain supplemental information about this release.

Revision history
Revision history for PowerFlex3.6.0.5 release notes
Table 1. PowerFlex3.6.0.5 release notes revision history

Product description

PowerFlex is a software-defined storage platform designed to significantly reduce operational and infrastructure complexity.
It empowers organizations to move faster by delivering flexibility, elasticity, and simplicity with predictable performance and resiliency at scale.
The PowerFlex family provides a foundation that combines compute as well as high performance storage resources in a managed unified fabric. PowerFlex comes in fully managed flexible deployment options for rack or appliance that enable Server SAN, HCI, and storage only architectures. PowerFlex can now be deployed in the public cloud. A Ready Node option is also available. PowerFlex is ideal for high performance applications and databases, building an open private cloud, or consolidating  resources in heterogeneous environments.

New and changed features
Learn about new and changed features in this version of PowerFlex.

New features for PowerFlex
Learn about the new features introduced in PowerFlex 3.6.0.5 software.

• PowerFlex is now available as a consumption model in the public cloud. PowerFlex 3.6.0.4 is supported on AWS.
• PowerPath 7.4 for Linux now supports PowerFlex devices. PowerPath Migration enabler can be used for data migration across PowerFlex and other PowerPath supported storage array classes.

NOTE : Only PowerFlex SCSI devices are supported. Since PowerFlex devices have only a single path, PowerFlex takes care of load balancing across different SDS.

Important
The following aspects of PowerFlex 3.6.0.5 must be understood before deploying or upgrading your system:

1. CloudIQ integration

2. Discovering a PowerFlex system in CloudIQ requires the system to be registered with SRS. In the PowerFlex Installer, Maintain tab, ensure that the PowerFlex system is registered with SRS and that Send data to CloudIQ is enabled.

3. After installing a new PowerFlex system with PowerFlex version 3.6, it takes 24 hours until data is available in CloudIQ. Systems upgrading to PowerFlex 3.6 will appear in CloudIQ within an hour of enabling the Send data to CloudIQ option.

4. PowerFlex appliance and rack systems need PowerFlex Manager version “H” in order to be discovered in CloudIQ.

5. Replication enhancements

6. Bi-directional replication between two sites only is supported.

7. See the PowerFlex Sizer for sizing guidelines for correct replication system specifications, including WAN bandwidth sizing. When using the PowerFlex Sizer, take into account existing workload and existing hardware, and the possible need to add additional nodes to enable replication without impacting the current workload.

8. Replication capability has higher I/O overhead, as explained in the v3.6 Getting to Know PowerFlex Guide (Replication section) and the white paper Dell EMC PowerFlex: Introduction to Replication. See these recommendations in order to
   size your system correctly, and ensure that you have sufficient existing storage capabilities to enable this ability.

9. Network resiliency improvements

10. Proactive network path error detection requires SDC to be at v3.6 or later.

11. Upgrade Paths

12. Upgrade from PowerFlex version 3.0.x and 3.5.x to version 3.6 are supported.

13. Older PowerFlex/VxFlex OS versions must be upgraded to version 3.0.x prior to upgrading to version 3.6.

14. vSphere plug-in End-of-Support-Life

15. The PowerFlex vSphere plug-in continues to be supported with vSphere versions 6.5 and 6.7, however it reaches end-of-support-life when vSphere 6.5 and 6.7 reach end-of-support by VMware.

16. The PowerFlex vSphere plug-in does not support vSphere 7 hyperconverged (HCI) configurations.

Changed features

• Learn about the enhanced features for this version of PowerFlex.
• No features were changed in PowerFlex 3.6.0.5.

Updated operating system support matrix
There are no changes to operating system support in this release.
For more operating system-related information and supported components, refer to the PowerFlex simple support matrix: https://elabnavigator.dell.com/eln/modernHomeSSM

Oracle JRE and OpenJDK support

• Oracle JRE 1.8 build 322
• OpenJDK JDK 8 build 322.b06
• OpenJDK 11.0.12.07 (Linux-based servers only)

Support deprecation

Learn about the features that are no longer supported in PowerFlex 3.6.0.5.

Background scanner events and alerts
Some events and alerts for the background scanner feature were deprecated, and replaced with different ones. See the PowerFlex v3.5.1.2 Release Notes, “Documentation” section, for details.

DAS Cache
DAS Cache is no longer supported for PowerFlex running on any operating systems.

System Analysis Tool
The System Analysis Tool is no longer included in PowerFlex.

AMS
Systems managed by AMS system will not be able to upgrade to PowerFlex v3.5 or later. Prior to performing an upgrade, contact PowerFlex Product Management for possible alternatives.
NOTE : AMS artifacts will be removed from the support site. For guidance, contact PowerFlex Product Management.

VxFlex OS GUI client
The GUI from versions earlier than v3.5 of this product is no longer supported and cannot be upgraded. From v3.5 and later, a new GUI must be deployed/upgraded instead.

Deprecated operating systems
For the most current information, see the Dell EMC Simple Support Matrix (ESSM) at https://elabnavigator.emc.com/eln/modernHomeSSM/.

Fixed issues
The following table lists the issues that are fixed in PowerFlex3.6.0.5.
NOTE : If an issue was reported by customers, the customers’ Service Request numbers appear in the “Issue number & SR number” column, and correlate between customer-reported issues and the PowerFlex issue number.
Table 2. Fixed issues

SCI-65334

SR# 134810840

| During non-disruptive upgrade to PowerFlex 3.6, the SDS maintenance mode takes longer when the MDM returns an incomplete query to the PowerFlex Gateway.
SCI-68154| The SDC container used supervisord to run and log the diagnostic message. All the kernels do not support the diagnostic message switch which caused the supervisord to return the diagnostic messages in an infinite loop and consume excessive CPU.
SCI-67542 SR# v1007162| Disruptive upgrade occurred on SDC during RCM upgrade. Deadlock on locking Octet in L2P directory between the L2P Page merges flow. The L2P split-upgrade flow that is invoked causes a disruptive upgrade due to SDS IO timing out.
SCI-68153| The SDC-SDS TCP disconnected when the SDS host was hard reset while establishing the security communication link. The keepalive manager does not close the socket due to inactivity and remained open indefinitely.
SCI-65052

SR# 133347603

| The SDS disconnected when a large set of data was allowed into the Protected Maintenance Mode. The MDM delayed the RoleSwitch and created a timeframe which resulted in an IO error until the SDS responded to all the combs.
SCI-66526 SR# 139180450| During an IO background operation, you must split few operations to multiple MD pages to fit in the correct size of an FG device. A new write with an existing background operation leads to an overflow in the MD buffer space and causes the SDS crash when detected.
SCI-66575| IM scripting “stop process on script failure” does not stop on failure and the indicator may be overridden. If validateNoCriticalFailureCommand indicates a failure due to a flag in criticalCommandFailedArr, the sequence stops at exit-SDS-from-MM since this command always runs.
SCI-65531 (SR# 135236911)| When you unmap a volume from the latest SDC version, the volumes remain mapped even if the unmap operation is completed.
SCI-67424 SR# v1005052| SDS decoupled due to panic “ALWAYS_ASSERT IO takes too long”. Incorrect locking order of L2P Directory octet and octet counters leads to a deadlock between L2P Page merge flow and QueryCapacityUtilization. This blocks many IO operations indefinitely until SDS panics due to timeout.
SCI-67007| Execution of sas3ircu triggers SVM crash on PowerEdge 15G-based hosts. For details, see DTA 199549.
SCI-66906| Tomcat versions 8.5.79 and earlier is exposed to CVE-2022-29885. PowerFlex Gateway does not use the clustering feature and is not exposed to the issue.
Issue number & SR number| Problem summary
---|---
SCI-65370| The exclude log collection check box for the SDC log collection was removed. The check box is restored to exclude and include the node log collection.
SCI-62416

SR# 119473468

| When running scripts on host feature, the operation logs does not check the script files in nodes.

Software packages

Learn about the contents of the PowerFlex 3.6.0.5 software packages.

Download location
The PowerFlex 3.6.0.5 complete software package, containing all the packages listed below, can be downloaded from the following location:
https://www.dell.com/support/home/en-us/product- support/product/scaleio/overview
Table 3. Software packages

components for Red Hat, CentOS and Oracle Linux 7.x. Oracle Linux 7.8 and higher includes KVM.
RHEL8_OEL8| X| X| X| X| X| X| X| Core components for Red Hat, CentOS and Oracle Linux 8.x. Oracle Linux includes KVM.
RHEL_OEL9|  |  |  |  |  |  |  |  |
CENTOS 7.9|  |  |  |  |  |  |  |  |
CentOS Stream 8|  | X| X| X| X| X| X| X| Core components for CentOS Stream 8
CENTOS

Stream 9

|  |  |  |  |  |  |  |  |
SLES11.4| SUSE Linux| X|  |  |  | X|  |  | SDC component for SLES 11 SP4
SLES12.5| X| X| X| X| X| X| X| Core components for SLES 12 SP5
SLES15.2| X| X| X| X| X| X| X| Core components for SLES 15 SP2
SLES15.3| X| X| X| X| X| X| X| Core components for SLES 15 SP3
Ubuntu18.04| Ubuntu| X| X| X| X| X| X| X| Core components for Ubuntu 18.04
Ubuntu20.04| X| X| X| X| X| X| X| Core components for Ubuntu 20.04
Package Name| Operating System| GW| MDM| SDS| SDR| SDC| LIA| Xcache| Content
---|---|---|---|---|---|---|---|---|---
Unbuntu22.04|  | X| X| X| X| X| X| X| Core components for Ubuntu 22.04.x LTS
XEN 7.1| XenServer / Citrix Hypervisor|  | X| X| X| X| X|  | Core components for Citrix XenServer 7.1.2 LTSR
XEN 8.0|  | X| X| X| X|  |  | Core components for Citrix Hypervisor 8.1

and 8.2

Complete_VM ware_SW| vSphere| X| X| X| X| X|  |  | Contains all PowerFlex, VMware- related software artifacts (OVA

file, drv_cfg file, SVM patching, SDC package, vSphere plug-in, and VASA provider)

NOTE: PowerFlex vSphere plug-in

is not compatible with ESXi 7.0 and later.

Complete_Win dowsSW| Windows Server| X|  |  |  | X| X|  | Contains all Microsoft Windows (2012-2019) server related software artifacts, including the gateway and CSV deployment templates
Fedora CoreOS| CoreOS|  |  |  |  | X|  |  | SDC component for Fedora CoreOS
RHEL CoreOS|  |  |  |  | X|  |  | SDC component for RHEL CoreOS
CoreOS|  |  |  |  | X|  |  | SDC component for CoreOS
AIX7.2| AIX|  |  |  |  | X|  |  | SDC component for IBM AIX 7.2
Presentation Server|  |  |  |  |  |  |  |  | Contains PowerFlex WebUI server (Linux and Ubuntu)
Gatewayfor Linux|  | X|  |  |  |  |  |  | PowerFlex Gateway, which includes the following: Installer, Gateway (for REST API, Alerts, SNMP/ ESRS) for Linux/ Ubuntu (can be used to deploy PowerFlex on Linux- based operating systems only). CSV

deployment templates are also included

NOTE:

• Please refer to the latest PowerFlex simple support matrix at https://elabnavigator.dell.com/eln/modernHomeSSM
• PowerFlex version 3.5 and later provides a Web UI. GUI packages are no longer available.

Documentation

Read about the online documentation portal, and late additions and corrections to PowerFlex documentation.

Online Documentation Portal
PowerFlex documentation is now available on the Dell Technologies Technical Resource Center; click here to view and download the latest version of the documentation. You can also access this link from the PowerFlex GUI, by clicking the ? icon and selecting Online Documentation.

For more information about what is included in the documentation, see the How to Find Information document on the Dell EMC Technical Resource Center.

Install and upgrade
PowerFlex 3.6.0.5 can be installed on a clean system or used as an upgrade. Learn important information about installing or upgrading to this version.

Installation

• For complete instructions for installing PowerFlex, see the Deploy PowerFlex Guide.
• For complete instructions for installing VxFlex Ready Node, see the VxFlex Ready Node Deployment Guide.

Licensing
PowerFlex use requires a license. Please call your Dell EMC account representative to purchase a license for PowerFlex.

Upgrade
The following table lists the versions from which the upgrade can be performed:
Table 4. Upgrade support matrix

ScaleIO / VxFlex OS / PowerFlex base version| Upgrade path| Supporting documentation
---|---|---
v2.0.1.4, v2.6.x| Two-step upgrade flow:

1.       Upgrade to latest version of v3.0.1.x

2.       Upgrade to v3.6.0.x

| Upgrade VxFlex OS to v3.0.x Guide Upgrade PowerFlex to v3.6 Guide
v3.0, v3.0.0.x, v3.0.1.x,

v3.5.x, v3.6, v3.6.0.1,

v3.6.0.2, v3.6.0.3

| Single-step upgrade from:

●               VxFlex OS v3.0/v3.0.0.x/v3.0.1.x

●               PowerFlex v3.5.x

●               PowerFlex v3.6/v3.6.0.1/v3.6.0.2/ v3.6.0.3

to PowerFlex v3.6.0.4

| Upgrade PowerFlex to v3.6 Guide

CloudLink support

for encrypted devices, using /dev/disk/by-id/wwn-

_< uniqueid>.

3.0.1.x all versions

3.5.x.x, all versions

| 7.1

7.0

| These CloudLink versions maintain legacy support for the existing CloudLink install base with the original device path logic: /dev/sd X.
3.6|  |
3.6.0.1|  |

NOTE: PowerFlex 3.6.0.2 supports migration and upgrade flows from CloudLink 7.1 to CloudLink 7.1.2.

Supported operating systems
The user documentation contains a list of supported operating systems. For the most current information, see the Dell EMC Simple Support Matrix (ESSM) at https://elabnavigator.dell.com/eln/modernHomeSSM, Storage option.

SDC compatibility
By design, the PowerFlex SDC in this release is compatible with previously released systems that are currently supported (for example, VxFlex OS v3.0.1). In addition, the PowerFlex system (backend) in this release is backward compatible with previously released SDC versions that are currently supported.

Some limitations may apply to mixed-version systems, such as:

• Replication is not supported on SDC releases earlier than PowerFlex v3.5.
• The CHAP component authentication feature cannot be enabled unless every MDM, SDC and SDS in the system is at least version 3.5, and conversely, if the feature is enabled, no pre-v3.5 SDCs can be added.
• Fine Granularity Storage Pool-based volumes cannot be mapped to a ScaleIO / VxFlex OS v2.x SDC
• Snapshot Policy management is not available with SDC releases earlier than VxFlex OS v3.0.

Known issues and limitations

The following table lists known issues and limitations that exist in PowerFlex 3.6.0.5.
NOTE : If an issue was reported by customers, the customers’ Service Request numbers appear in the “Issue number & SR number” column, and serve to correlate between customer-reported issues and the PowerFlex issue number.

Table 5. Known issues and limitations—PowerFlex Custom Node

to get the disk slot information.

Table 6. Known issues and limitations—PowerFlex Gateway

passwords in form-based authentication. If the browser is used in a shared computing

environment where more than one person may use the browser, “autocomplete” values may be retrieved or submitted by an unauthorized user.

| None.
SCI-58953| When running the PowerFlex Gateway on an Internet Explorer 11 browser, LIA Authentication gets stuck in “Loading…” status when retrieving system topology.| Use Chrome or Firefox browsers to perform this action.
SCI-58471| PowerFlex Gateway Tomcat log rotations do not work after an upgrade. At build time, the

“server.xml” file is defined as a “noreplace-config file” in the RPM. During an upgrade, the RPM mechanism will automatically detect if the file was previously edited or not. If the file was edited, it will not be overwritten during upgrade, and the new file will be created with the “.rpmnew” suffix.

| Edit the file “server.xml” manually, and change the log rotation rules. For more information,

see the PowerFlex Troubleshooting Guide, “Some PowerFlex Gateway log files fail to rotate” topic.

SCI-57810| The PowerFlex Gateway Maintenance operation screen might show an invalid LIA authentication for a containerized SDC when connecting to the system. This should appear as N/A, and can be ignored.| None
SCI-57304| PowerFlex Installer (also known as the PowerFlex Gateway) is exposed to issue HSTS Missing From HTTPS Server, CVE:

https://nvd.nist.gov/vuln/detail/CVE-2017-7789

| None
SCI-55819| During NDU to v3.5.1.x, in rare cases, the PowerFlex Gateway might have high CPU usage and get stuck at the upload phase.| Perform a restart of the gateway service using an SSH session to the PowerFlex Gateway:

service scaleio-gateway restart

Then, in the PowerFlex Installer user interface, click Retry to continue the upgrade.

SCI-54887| When performing the log collection via the PowerFlex Gateway with the “exception only” check box marked, the log collection fails.| Perform log collection with the default settings via the PowerFlex Gateway.
Issue number & SR number| Problem summary| Workaround
---|---|---
SCI-54799| If Auto Collect logs is configured in the system during an NDU session, when the NDU ends, the PowerFlex Installer will display a button asking to start the first phase of the NDU, even though the previous one was completed successfully (instead of displaying the “Mark operation as done” button).| Disable auto log collection prior to starting the NDU, and run the NDU. After NDU completion, enable auto log collection again.

Table 7. Known issues and limitations—MDM

must be the same. Otherwise. one of the following errors will be received in the SRM/SRA GUI:

SRA command ‘discoverArrays’ failed. General exception No further information available

SRA command ‘discoverArrays’ failed. general error check logs for detail

| Change the PowerFlex Gateway and MDM user passwords at the same time. Ensure that they have admin permissions and the same password.

Table 8. Known issues and limitations—Presentation server

a PowerFlex 3.5 system, some of the UI functionality does not work as expected.| Use the matching version of the presentation server.

In an upgrade flow, refer to the upgrade guide for guidelines about when and how to upgrade the presentation server.

Table 9. Known issues and limitations—SDC

However, after installation, when checking if the SDC driver’s scini service is loaded, the following confusing state is returned:

service scini status

service: no such service scini

This is a false positive status alert.

| None

Table 10. Known issues and limitations—SDR

for all volumes in the RCG to complete their initial copy phase before performing the failover operation for that RCG.

Table 11. Known issues and limitations—SDS

following: dev/

disk/by-id/nvme-Dell_Express_FlashNVMe P4610_1.6TB_SFF_BTLN950106ZB1P6AGN

the MDM blocks the addition due to the error: new_device_path too long, MDM supports up to 63 characters.

| Use the alternative name path in by-id location with nvme-eui in the path. For example:

/dev/disk/by-id/nvme- eui.01000000010000005cd2e448b0b75151

Table 12. Known issues and limitations—vVols

trying to overwrite its content, might generate the error: “volume n is in use”.| None. Try again shortly after, because some volume operations are executed in an asynchronous fashion.

Operating system known issues and limitations

Learn about known issues and limitations for specific operating systems.
Table 13. Known issues and limitations—operating systems

install the Mellanox driver.
VXFV-283| iDRAC support for “Prepare for Removal” on PowerEdge R650/R6525/R750/ nodes fails.| NVMe hot-swap on Linux operating systems is supported. Skip the Prepare for Removal step in iDRAC.
VXFV-265| During execution of the command create- namespace with 4k alignment on RHEL 8.4, the following error is encountered:

Warning: namespace0.0 unable to validate alignment

| This is a false notification. The command result is as expected, and the resulting DAX device can be used with PowerFlex acceleration devices.
VXFV-243| Upgrade of a RedHat-based operating system to RHEL 8.3 fails if the node contains NVDIMMs.

This is due to a known issue on RHEL

8.3: https://access.redhat.com/documentation/ en-us/red_hat_enterprise_linux/8/html- single/ 8.3_release_notes/index#known- issue_installer- and-image- creation

| Follow the procedures described in “RHEL/ CentOS upgrade to version 8.3” in the Upgrade Dell EMC PowerFlex.
VXFV-224| In a RHEL 8.x-based node using Cloudlink encrypted SDS devices, after reboot the device moves to failed state.

NOTE: This issue is much rarer on RHEL7.x- based nodes, but it might occur.

| 1.      SSH to the relevant SDS’s operating system.

2.      Delete the SDS service.

3.      Clear the device errors using the PowerFlexGUI or CLI.

4.      Recreate the SDS service.

5.      Verify that devices come back online. Rebuild/ Rebalance will occur if instant maintenance mode or protected maintenance mode was not used.

exit maintenance mode.
VXFV-157| NVMe disks are not supported on RHEL 8.0 due to the following issues:

https://access.redhat.com/solutions/4280341

Failure to observe this limitation might cause RHEL-based SDSs with NVMes to experience kernel panic during a disk removal flow.

| None

Additional resources
Use these resources to find more information about this product, get support and provide feedback.

Product information
For documentation, release notes, software updates, or information about Dell EMC products, go to Dell EMC Online Support at:
https://www.dell.com/support/home/en-us/product- support/product/scaleio/overview

Where to get support
Go to Dell EMC Online Support and click Support. You will see several options for contacting Dell EMC Technical Support. Note that to open a service request, you must have a valid support agreement. Contact your Dell EMC sales representative for details about obtaining a valid support agreement or with questions about your account.

Notes, cautions, and warnings

• NOTE : A NOTE indicates important information that helps you make better use of your product.
• CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
• WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

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