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IBM Spectrum AccelerateVersion 11.5.3.c

Release Notes

IBM

Third Edition (September 2016)

This edition applies to version 11.5.3.c of IBM Spectrum Accelerate. Newer document editions may be issued for thesame product version in order to add missing information, update information, or amend typographical errors. Theedition is reset to 'First Edition' for every new product version.

© Copyright IBM Corporation 2016.US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contractwith IBM Corp.

Contents

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1What's new in version 11.5.3.c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Hot upgrade from earlier versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Primary features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Licensing and download . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Required VMware ESXi host machines. . . . . . . . . . . . . . . . . . . . . . . . . . 3Required vSwitch, network, and deployment host . . . . . . . . . . . . . . . . . . . . . . 5

Management and automation tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Change log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Version 11.5.3.c (June 2016) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Version 11.5.3.b (May 2016) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Version 11.5.3 (December 2015) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Version 11.5.1.c (September 2015) . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Version 11.5.0.d (July 2015) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Version 11.5.0.c (May 2015) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Version 11.5.0.b (March 2015) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

User responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Serviceability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Known issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

© Copyright IBM Corp. 2016 iii

iv IBM Spectrum Accelerate

Overview

IBM Spectrum Accelerate™ is a software-defined storage (SDS) solution that allowsenterprises to use their own server and disk infrastructure for assembling,setting up, and running one or more storage systems that incorporate the provenXIV® storage technology.

IBM Spectrum Accelerate is provided as a virtual appliance for VMware ESXihypervisors. The Spectrum Accelerate virtual appliance software is installed on3–15 physical ESXi hosts (servers), which together comprise a single storage systemthat operates with the XIV technology microcode. IBM Spectrum Acceleratesupports hyper-convergence, allowing other virtual machines to run in parallel onthe same ESXi hypervisor.

Each individual ESXi host acts as a storage system module, containing 6 to 12physical disks that are utilized by the Spectrum Accelerate virtual appliance. Theinterconnected modules form a complete mesh and enable the unique datadistribution and other advanced features and capabilities.

IBM Spectrum Accelerate can be deployed either on-premises or off-premises.

For more detailed information about IBM Spectrum Accelerate, refer to its userdocumentation and online information.

What's new in version 11.5.3.cVersion 11.5.3.c of IBM Spectrum Accelerate is a minor release that contains adeployment hotfix.

General availability date: 22 June 2016

For more information, see “Version 11.5.3.c (June 2016)” on page 8.

Hot upgrade from earlier versionsNo direct hot upgrade from an earlier IBM Spectrum Accelerate version isavailable for version 11.5.3.c.

Version 11.5.3.c requires a clean installation.

© Copyright IBM Corp. 2016 1

Primary featuresIBM Spectrum Accelerate version 11.5.3.c offers the following primary functionalfeatures, which are based on the proven XIV storage technology and capabilities.

Feature Functionality note

Full data redundancy and distributionacross modules and disks

Powered by XIV technology

Fast data rebuilding

Load balancing

Self-healing mechanisms

Storage pools and volumes

Snapshots

Consistency groups

Hyper-Scale Consistency

Thin provisioning and space reclamation

Synchronous remote mirroring

Asynchronous remote mirroring

Offline initialization for mirroring

Multi-tenancy

IBM® Hyper-Scale Mobility

Non-disruptive microcode upgrade

Quality of Service (QoS)

User access profiles (permission sets) andLDAP authentication

Remote configuration management

Event handling and push notifications(e-mail, SNMP, SMS)

State-of-the-art management andmonitoring GUI

Provided from the XIV managementtools

IBM Hyper-Scale Manager

Mobile Dashboard application for mobiledevices (iOS and Android)

Realtime monitoring for XIV andSpectrum Accelerate systems

Advanced CLI management Including hardware servicingcommands

RESTful APIs Web service APIs in adherence to theRepresentational State Transfer(REST) architecture

2 IBM Spectrum Accelerate

Feature Functionality note

Management over IPv4 and IPv6 Powered by XIV technology

Management over IPsec

iSCSI connectivity, including CHAPauthentication over iSCSI

Multiple host access

IBM remote support and proactivesupport

Can be enabled or disabled percustomer needs

For more detailed information about these features, see the IBM SpectrumAccelerate Product Overview publication.

Licensing and downloadIBM Spectrum Accelerate is a downloadable software product that must belicensed per storage capacity.

The licensed storage capacity can be used by several Spectrum Acceleratedeployments (several Spectrum Accelerate storage systems) as long as the totalstorage capacity of all deployments does not exceed the licensed storage capacity.

For more information about the available download and licensing options for IBMSpectrum Accelerate, check the IBM Passport Advantage® website(ibm.com/software/passportadvantage).

Important:

v Using IBM Spectrum Accelerate beyond the licensed storage capacity is notallowed. Consult with an authorized IBM representative to obtain informationabout the required IBM Spectrum Accelerate licensing for your organization.

v The license is associated with your IBM customer number (ICN). Contact IBM toobtain your ICN.

RequirementsThis section specifies the hardware and configuration requirements of IBMSpectrum Accelerate version 11.5.3.c.

Note: For comprehensive information about planning, preparation, and bestpractices, see the IBM Spectrum Accelerate Planning, Deployment, and OperationGuide publication.

Required VMware ESXi host machinesIBM Spectrum Accelerate requires 3–15 (minimum 3; maximum 15) VMwareESXi host machines (physical servers; see ESXi software requirements below) to beused as the individual modules of the storage system.

Overview 3

http://www.ibm.com/software/passportadvantage

Important: The following hardware components and configuration must bededicated solely for the IBM Spectrum Accelerate virtual machine. Additionalhardware resources are needed for other virtual machines, applications, orbackground services that run in parallel, and for the ESXi server functionality.

Required hardware

The following hardware components on the ESXi host machine must be dedicatedfor the IBM Spectrum Accelerate virtual machine (additional hardware resourcesmust be allocated for the ESXi server functionality):v x86-64 CPU with 4 physical cores (not counting on Hyper-Threading) or more. If

only 4 physical cores are used, their maximum CPU utilization must bededicated to IBM Spectrum Accelerate. 2 additional cores must be allocated forthe ESXi server functionality.

v At least 24 GB and up to 128 GB of RAM –– All ESXi host machines must have the same amount of physical RAM

dedicated for the IBM Spectrum Accelerate virtual machine.– Additional and sufficient RAM must be allocated for the ESXi server

functionality.

– If 4 TB or 6 TB disks are used (see disk options below), at least 48 GB ofRAM is required for the Spectrum Accelerate virtual machine.

v 6 to 12 physical hard disk drives (HDDs) –– Capacity of at least 1 TB and up to a maximum of 6 TB is required for each

HDD.– All HDDs should have the same capacity.– All ESXi host machines must have the same number of HDDs (6 to 12)

dedicated for the IBM Spectrum Accelerate virtual machine.– All HDDs must have up-to-date firmware. Check the HDD manufacturer

website to obtain the most updated disk firmware.

– If SED capable HDDs (Self-Encrypting Drives) are used, only the global band(Band 0) can be defined. No user bands are allowed.

– An additional disk is required for the VMware ESXi Server software.– For better performance (not mandatory, but recommended) :

- Any RAID function of the disk controller should be disabled (all HDDsshould work in JBOD mode). Instead of RAID functions, use a host busadapter (HBA). If used, verify the HBA firmware and driver version asspecified in VMware KB article 1027206 (kb.vmware.com/kb/1027206).

- Any SAS controller should function without a cache, and should becompatible with VMware ESXi as specified on the VMware CompatibilityGuide (vmware.com/resources/compatibility).

v One solid-state drive (SSD) of 480 GB or larger capacity of up to 800 GB forcaching purposes (not mandatory, but recommended).

v At least one 10-Gigabit Ethernet (10 GigE) port for the interconnect network; upto eight ports per ESXi host machine.

v At least one Gigabit Ethernet (1 GigE) port (or of higher capacity) for themanagement and iSCSI networks.

v Uninterruptible power supply (UPS).


http://kb.vmware.com/kb/1027206

http://www.vmware.com/resources/compatibility

http://www.vmware.com/resources/compatibility

Attention: Accidental power loss or improper system shutdown might result indata loss. In case of power loss, immediate manual shutdown of the storagesystem is required, followed by at least 30 seconds of continuous backup powerto allow graceful shutdown of the storage system.

Required ESXi version and configuration

Each individual ESXi host machine should be pre-configured with:v ESXi 5.5 Update 2 or a higher update of version ESXi 5.5 only. The ESXi

platform must run on a 64-bit operating system.v One datastore with at least 250 GB free space for storing the image of the

Spectrum Accelerate virtual appliance. Use a different name for each datastoreon each ESXi host machine, to prevent any silent renaming of those datastoresby vCenter Server (if used).

v Management IP address for the Spectrum Accelerate virtual machine.v One or two IP addresses for iSCSI connectivity.v SSH access enabled (can be disabled after the deployment is completed).v SSH and ESX Shell services up and running.v Three separate IP subnets for the following Spectrum Accelerate networks:

– Management network– iSCSI network– Interconnect network

v NIC teaming configuration if more than one 10-Gigabit Ethernet port is used.

Required vSwitch, network, and deployment hostThe following table provides information about the required vSwitches,interconnect network, and deployment host.

Component Requirements

vSwitch One, two, or three vSwitches (virtual switches) withcorresponding port groups to which the management,interconnect, and iSCSI networks can connect.

As a best practice, the same port group names should bepredefined on all ESXi hosts on which you intend todeploy the IBM Spectrum Accelerate virtual appliance.

Interconnect network Must consist of a 10-Gigabit Ethernet LAN and mustinclude:

v One static IP address per module. All IP addresses mustreside in the same subnet.

v End-to-end MTU setting of 9000 bytes (Jumbo frame).

Note: Use of a private VLAN for the interconnect networkis recommended.

Overview 5

Component Requirements

Deployment host One deployment host from which the IBM SpectrumAccelerate software is to be deployed on the ESXi hosts.Any of the following operating systems can be used on thedeployment host:

v 32-bit or 64-bit Ubuntu Linux 12.04 or 14.04v 32-bit or 64-bit Red Hat Enterprise Linux (RHEL) 6.5v 32-bit or 64-bit Microsoft Windows 7

The deployment host must have root access to themanagement IP address of the ESXi hosts.

A Linux deployment host requires GNU Tar 1.15 or later,which can be obtained from the GNU website(gnu.org/software/tar).

Management and automation toolsIBM Spectrum Accelerate version 11.5.3.c can be managed and monitored with thefollowing software management tools.v IBM XIV Management Tools version 4.8 or laterv IBM Hyper-Scale Manager (application or virtual appliance) version 1.9 or laterv IBM XIV Mobile Dashboard (for monitoring only) version 1.4.0.1 or later

Note: Although earlier management tool versions might be able to detect andmanage Spectrum Accelerate systems of version 11.5.3.c, the latest SpectrumAccelerate functional features are supported only by the management tool versionsspecified above.

IBM Spectrum Accelerate customers are entitled to free use of these managementtools, which can be downloaded at any time from the IBM Fix Central website(ibm.com/support/fixcentral).

The Mobile Dashboard application can be downloaded and installed at any timeand from Apple Store (iOS version) or Google Play (Android version).

IBM Spectrum Control Base Edition

IBM Spectrum Accelerate version 11.5.3.c is supported by IBM Spectrum ControlBase Edition version 2.2.1 or later, which provides the following VMware platformintegration tools.v IBM Storage Provider for VMware VASAv IBM Storage Enhancements for VMware vSphere Web Clientv IBM Storage Plug-in for VMware vCenter Orchestratorv IBM Storage Management Pack for VMware vCenter Operations Manager

For more information, see IBM Spectrum Control Base Edition on IBM KnowledgeCenter (ibm.com/support/knowledgecenter/STWMS9).

IBM Spectrum Accelerate customers are entitled to free use of IBM SpectrumControl Base Edition, which can be downloaded at any time from the IBM Fix


http://www.gnu.org/software/tar

http://www.ibm.com/support/fixcentral

https://itunes.apple.com/us/app/ibm-xiv-mobile-dashboard-for/id503500546?mt=8

https://play.google.com/store/apps/details?id=com.ibm.xiv.mobile.android

http://www.ibm.com/support/knowledgecenter/STWMS9

http://www.ibm.com/support/knowledgecenter/STWMS9


Central website (ibm.com/support/fixcentral).

Available cloud storage solutions

IBM Spectrum Accelerate version 11.5.3.c can be integrated with variousindependent software vendor (ISV) platform, application, virtualization, and cloudenvironments.

To facilitate this integration, IBM provides the following software solutions, alsoreferred to as cloud storage solutions.

Cloud storage solution Version Compatibility note

IBM XIV Host Attachment Kit 2.5.0 or later Available for Linux,Oracle Solaris, and MicrosoftWindows Server hosts that areconnected over iSCSI only

IBM XIV Provider for Microsoft WindowsVolume Shadow Copy Service (VSS)

2.7.0.1 or later

IBM XIV Storage Replication Adapter(SRA)

2.2.1 or later For use with VMware vCenterSite Recovery Manager

IBM Storage Driver for OpenStack 1.5.0 or later Version 1.5.0 supports onlythe OpenStack Kilo release

IBM Storage Management Pack forMicrosoft System Center OperationsManager

2.4.0 or later

IBM Spectrum Accelerate customers are entitled to free use of the IBM cloudstorage solutions, which can be downloaded at any time from the IBM Fix Centralwebsite (ibm.com/support/fixcentral).

For more information about the available cloud storage solutions for IBM SpectrumAccelerate, see Platform and application integration on IBM Knowledge Center(ibm.biz/BdXtG8).

Change logThis change log summarizes the enhancements and fixes in the different 11.5.xcode level versions of IBM Spectrum Accelerate.

Note: New functional features of these versions are only briefly summarized. For adetailed summary of the new functional features of a specific version, refer to the'What's new' section of its release notes.

Overview 7




http://www.ibm.com/support/knowledgecenter/STZSWD_11.5.1/hsg/hsg_kcwelcomepage_xsa.html

Version 11.5.3.c (June 2016)Version 11.5.3.c is a minor release that includes the following hotfix.

Ticket ID Description

SYS-281008 Fixed: If during the deployment from VMware vCenter the ESXihost password or username is omitted, the deployment scriptexits instead of prompting for an interactive password.

Severity: Service

Affected versions: 11.5.3

Version 11.5.3.b (May 2016)Version 11.5.3.b was a minor release that includes the following hotfix andimprovements.


SYS-277175 Fixed: During deployment, interactive username/password inputdoes not work when the username or password is omitted.

Severity: Low

Affected versions: 11.5.3 or later

Improvement in version 11.5.3.b:


SYS-278011 Added support for HP controllers: Disk location is now reportedin both HBA and RAID 0 modes, LED indications are supportedin RAID 0 mode.

SYS-277024 Version 11.5.3.b adds support for deployment from deploymenthosts with 32-bit operating systems. VMware OVF Tool wasupdated to version 4.1 for both Linux and Microsoft Windows.

Version 11.5.3 (December 2015)Version 11.5.3 of IBM Spectrum Accelerate was a major release that added supportfor IBM Hyper-Scale Mobility (volume migration), enabling migration of a volumefrom one Spectrum Accelerate instance to another with minimal host involvementand no disruption to host applications.

In addition, version 11.5.3 added support for:v Disk LED blinking to simplify the replacement procedure for failed or

phased-out disks.v 6 TB and 10,000 RPM disk drives.

Fixes in version 11.5.3:



SYS-273223 Fixed: In rare cases, an IBM Spectrum Accelerate system with anasynchronous mirror relation might fail if the target connectivityis down and a new asynchronous mirror is created with theOffline init option selected.

Severity: High Impact


SYS-275662 Fixed: If data disks used by the systems are configured with userbands, specific write operations might silently fail resulting in adata integrity issue.


Affected versions: 11.5.1.c or later

SYS-273769 Fixed: In rare cases, a non-critical thread might enter an endlessloop and impact performance.

Severity: Moderate


SYS-274270 Security Fix: CVE-2015-4171

Fixed: strongSwan might allow a remote authenticated attacker toobtain sensitive information. This was caused by an error inIKEv2 connections related to server authentication with acertificate and EAP or pre-shared keys. An attacker might exploitthis vulnerability to obtain user credentials and other sensitiveinformation.

For more information see: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4171

Severity: Moderate

Affected versions: 11.5.0.b

SYS-274413 Security Fix: CVE-2015-5621

Fixed: Net-SNMP is vulnerable to a denial of service. This iscaused by incompletely parsed varBind variables left in the list ofvariables by the snmp_pdu_parse() function. A remote attackermight exploit this vulnerability to cause the application to crashor possibly execute arbitrary code on the system.

For more information see https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5621

Severity: Moderate

Affected versions: 11.5.0.b

Overview 9

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-4171





SYS-273676 Fixed: Certain disk controllers or drives do not providepass-through capability or JBOD mode. As a result, Disk Self Teston these devices is not supported. In such cases, the deploymentfails with the corresponding error in Diagnostics mode.

Severity: Service

Affected versions: 11.5.0.b or later

Version 11.5.1.c (September 2015)Version 11.5.1.c of IBM Spectrum Accelerate was a major release that addedsupport for converged infrastructure, allowing different virtual machines to run onthe same ESXi servers on which the IBM Spectrum Accelerate virtual machineruns.

In addition, starting from version 11.5.1.c:v VMware vSphere cluster features are supported, including High Availability

(HA), Fault Tolerance, and Distributed Resource Scheduling (DRS).v Individual disks of any IBM Spectrum Accelerate module can be identified with

their factory-issued alphanumerical ID string.v The deployment of IBM Spectrum Accelerate can be simulated in

diagnostics-only mode.

Fixes in version 11.5.1.c:


SYS-265489 Fixed: The option of using more than one target system in amirroring relation is blocked only from the GUI and not by thesystem, leading to potential compromise of data on the targetsystem if more than one target system is defined.



SYS-266311 Fixed: Using audit_config_set with a port number that is greaterthan 65535 is not rejected, and the default port number 514 isused.

Severity: Service


SYS-266623 Fixed: Attempting to connect to an LDAP server over SSL mightfail and issue the LOGIN_FAILURE_LDAP_SERVER_UNREACHABLE errorafter a previous connection was made to LDAP without usingSSL, or connecting to an LDAP server with a different certificate.

Severity: Service




SYS-269430 Fixed: In some rare cases under extreme I/O rates, a singlemodule might lose host connectivity.

Severity: Service


SYS-269449 Fixed: When working in LDAP mode integrated withmulti-tenancy, the ldap_user_list command returns AccessDenied prompt when issued by global administrators.

Severity: Low

Affected versions: 11.5.0.c, 11.5.0.d

Version 11.5.0.d (July 2015)Version 11.5.0.d was a minor release that included the following hotfix. Version11.5.0.d replaced version 11.5.0.c.


SYS-271931 Fixed: If an emergency system shutdown occurs while SSDcaching is used, after the system starts again it is impossible toissue commands that involve configuration changes (for example:pool_create, vol_create, vol_resize, vol_rename, and so on).



Version 11.5.0.c (May 2015)Version 11.5.0.c was a maintenance release that included a range of fixes andimprovements, as listed in the following table. Version 11.5.0.c replaced version11.5.0.b.


SYS-269749 Enhancement: More than one module can be added to theSpectrum Accelerate system in one operation.

SYS-269949 Enhancement: Improved hardware and ESXi hypervisor datacollection for post-error analysis.

SYS-271228 Enhancement: Various improvements in performance andhardware utilization.

SYS-269763 Enhancement: Improved event logging, as well as improvedmechanism for detecting disk errors and unsupported hardwareduring the deployment.

SYS-270514 Fixed: Stability issues might be encountered with solid-statedrives (SSDs).

Affected version: 11.5.0.b


Overview 11


SYS-271019 Fixed: Disk identification issues might be encountered.


Severity: Moderate

SYS-270740 Fixed: Stability issues might be encountered when removing andadding modules.


Severity: Service

SYS-269998 Fixed: In some cases, the Spectrum Accelerate system might issuethe following event: NO_CONNECTION_TO_MAINTENANCE_MODULE


Severity: Low

SYS-269847 Fixed: The following error message might appear during thedeployment if a Linux deployment host is used:

tail: inotify cannot be used, reverting to polling


Severity: Low

SYS-269593 Fixed: In some cases, the following event might be issued for amodule: INTERCONNECT_RTT_IS_BACK_TO_NORMAL. The eventindicates that there have been delays on the interconnect network,but it might be issued even if there were no delays.


Severity: Low

SYS-269686 Fixed: When deploying Spectrum Accelerate with an XMLdeployment file that contains XML comments, the deploymentignores the vCenter server settings, even if the vCenter settingsare specified in the XML file.


Severity: Low

Version 11.5.0.b (March 2015)Version 11.5.0.b was the initial release of IBM Spectrum Accelerate, the firstsoftware-defined storage solution that is based on the mature and proven XIVtechnology and functional features.

User responsibilitiesBecause IBM Spectrum Accelerate can be deployed on any commodity hardware ofchoice, users must furnish its hardware, set up and establish its interconnectnetwork, connect it to other networks as needed, deploy its software, andindependently monitor its server configuration and hardware components.


Users must also:v Maintain the ESXi server health with the most up-to-date drivers, including the

use of disk drives (HDD, SSD) and disk controllers with up-to-date firmware.Failure to provide the ESXi servers with the most up-to date drivers andcontrollers may prevent the IBM support team from recovering the system incase of a critical sev1 issue, and cause a delay in IBM support response time.

v Verify that the cluster/grid interconnect network is in good standing at all times.This includes making sure that no IP address collisions occur.

v Maintain the overall system operation environment, including the operatingtemperature and continuous power supply for its servers, based on thespecifications of the hardware of choice.

v Regularly perform any required maintenance for disks and servers that comprisethe storage system. This includes timely replacement and phase-in of failed disksand modules.

v Perform the software upgrade procedure when needed.v Implement and maintain a UPS with a graceful shutdown in case of power

outages to prevent data loss.

ServiceabilityIBM Spectrum Accelerate requires customers to monitor their storage system andregularly provide any required physical service to disks, servers, and networks thatcomprise the storage system.

To allow IBM to provide proactive support for the Spectrum Accelerate storagesystems, the Enable Proactive Support option must be enabled and properlyconfigured in the management GUI per storage system.

For more information, see the IBM Spectrum Accelerate Planning, Deployment, andOperation Guide publication.

LimitationsThe following functional limitations apply to IBM Spectrum Accelerate version11.5.3.c and may remain in effect in future Spectrum Accelerate software versions.

General limitations

The following features are not supported:v FC mirroring connectivityv FC host connectivityv Self-encrypting HDD support (SED)v 3-Way mirroring

Known issuesThis section details the known issues in IBM Spectrum Accelerate, along withpossible solutions or workarounds (if available). High-impact issues are listed first.

The following severity levels apply to known issues:v High Impact – Potentially irrecoverable error that might impact data or access to

data in rare cases or specific situations/configurations.

Overview 13

v Moderate – Limited functionality issue and/or performance issue with anoticeable effect.

v Service – Non-disruptive recoverable error that can be resolved through aworkaround.

v Low – Low-impact usability-related issue.

Important:

v The issues listed below apply to version 11.5.3.c. As long as a newer versionhas not yet been released, a newer release notes edition for version 11.5.3.cmight be issued to provide a more updated list of known issues andworkarounds.

v When a newer version is released for general availability, the release notes ofversion 11.5.3.c will no longer be updated. Accordingly, check the release notesof the newer version to learn whether any newly discovered issues affect version11.5.3.c or whether the newer version resolves any of the issues listed below.

Ticket ID SeverityAffectedversion(s) Description

SYS-275293 HighImpact

11.5.3 orlater

A Windows host may crash with the blue screen afterre-scanning the paths of a new volume, if the total number ofpaths exceeds 24.

Workaround: When re-scanning new paths (as part of theHyper-Scale Mobility process), make sure that the total numberof paths per volume from both proxy and owner systems doesnot exceed 24.

SYS-252743 Moderate 11.5.0.bor later

When entering several certificates to the certificate parameter,ipsec_connection_* CLI commands processes only the firstcertificate.

Workaround: Issue the relevant ipsec_connection_* commandfor one certificate at a time.


When changing a volume to read only, the system does notraise a SCSI Unit Attention to make the host aware of thechange.

Workaround: No workaround is currently available.


The multi-tenancy feature does not support Sun directory orOpen LDAP group objects. Static groups reflecting domainadministrators fail to log in, and receive an unrecognized rolecompletion code.

Workaround: Instead of the LDAP group object attribute, use thedescription string as a hard-coded value per user. For moreinformation, refer to the IBM XIV Storage System Architecture andImplementation Redbook.

SYS-253004 Service 11.5.0.bor later

Resizing a pool (reducing its volume capacity) does not triggerthe STORAGE_POOL_VOLUME_USAGE_INCREASED event when crossingthe preset threshold.

Workaround: No workaround is currently available. Accordingly,use caution when resizing down a storage pool.




In some rare cases, the pki_set_pkcs12 CLI command might failwhen trying to set a certification.

Workaround: Issue the command again.


Deleting a user certificate reverts the system to the genericcertificate instead of reverting it to the unique system certificate.

Workaround: Set the system-unique certificate as a defaultbefore removing the user certificate.


Domain administrators from different domains that share aresource, can view and delete that resource's metadata.



snmpwalk for volume statistics may take a long time whenmultiple volumes are defined.



When associating separate LDAP groups to separate domains, anLDAP directory user cannot belong to more than one group ifnot mentioned specifically by the group name in the format ofuser@domain1/domain2.

If a user is not defined in such a way and the memberOf fieldcontains more than one group, an LDAP_USER_CONFIG_ERROR eventis issued.



In IP filtering, FQDN host names are not supported byip_access_group_remove_address.

Workaround: Use an IP address instead.


When working with IP filtering, a subnet cannot be added to anIP access group if an IPO, that is part of the subnet, alreadyexists in the access group.

Although the ip_access_group_add_address command is issuedwithout an error, the subnet is not added.



If any of the parameters of pool_change_config are invalid, thecommand might start running and then fail halfway through.

Workaround: To avoid this problem, always runpool_change_config with valid parameter values.


IP filtering does not work for an IP range.

Workaround: Define an IP range by using an IP mask.


When using IP filtering, there is no validation that a valid IPaddress is entered to the IP Access Group.


Overview 15



When adding IP addresses to an IP Access Group for IP filtering,two addresses cannot be added with the same IP, but withdifferent netmasks.



When using the default setting for an RHEL syslog server, whichdoes not implement Protocol-23 from RFC-5424(http://tools.ietf.org/html/rfc5424), most of the event data is notdisplayed.

Workaround: Modify default RHEL rsyslog configuration(/etc/syslog.conf).

Instead of the default:$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat

Use:$ActionFileDefaultTemplate RSYSLOG_SyslogProtocol23Format


The format=full parameter on the CLI help command is notsupported.

Workaround: Use -f all instead of format=full.


The ldap_user_list role=storageadmin CLI command does notlist domain administrators.



When using the muti-tenancy feature and LDAP authenticationmode, a domain with which users are currently associatedcannot be deleted.

Workaround: To resolve this problem:

1. Turn off the LDAP authentication.2. Dissociate the old users from the domain.3. Delete the domain.4. Turn on the LDAP authentication.


In the CLI help, the command descriptions for thedomain_manage and domain_move_gp commands are incorrect.

Workaround: Use the latest CLI reference guide.


If defective hardware (disks, RAM, etc.) is encountered duringthe deployment, or if some required hardware components didnot initialize properly and in time with the rest of the system,the system might not start and then switch to Maintenance stateinstead.

Workaround:

1. Remove or replace the problematic hardware component.2. Perform the deployment procedure again.


http://tools.ietf.org/html/rfc5424



In some cases, a replaced disk might be erroneously detected asa previously used disk, and marked as Failed.

Workaround: This can be solved after occurrence by running thecomponent_test CLI command or Test GUI function for thespecific disk.


The SSD cache drive might fail after upgrading the SpectrumAccelerate version.

Workaround: Issue the component_test and component_phaseincommands for the SSD drive after upgrade.

SYS-272400 Service 11.5.1.cor later

For a successful system deployment, all ESXi servers mustbelong either to the same ESXi cluster or to no cluster at all. Thedeployment kit does not currently allow automatic deploymenton ESXi servers that belong to different ESXi clusters.

Workaround: Deploy the system on ESXi servers that belongeither to the same ESXi cluster or to no cluster at all, and thenassign these ESXi servers to different ESXi clusters as necessary.


During deployment, some errors in the console log might not bedescriptive enough.

Workaround: Check the deploy_sds_log log file that is located inthe SDS_Deploy folder. This log file contains detailed errordescriptions and root causes.

SYS-273467 Service 11.5.1.cor later

Certain SAS controllers do not provide access to SMARTparameters (disk monitoring parameters) that are used by thesystem. As a result, in some cases, such controllers cause thesystem to fail during deploy-time diagnostics. In other cases,however, the system diagnostics completes successfully. In allcases, the component_test CLI command fails.

Workaround: Contact IBM support to turn off SMARTmonitoring.

SYS-275680 Service 11.5.3 orlater

In rare cases, when running IBM Hyper-Scale Mobility in theproxy phase under a heavy I/O load, the interface-serviceconnectivity might fail.

Workaround: Contact IBM support.

SYS-265116 Low 11.5.0.bor later

When using the multi-tenancy feature, the system does not blockapplication administrators, who belong to user groups in theglobal domain, from being designated as IBM Hyper-ScaleManager users.

Workaround: Remove any application administrator from the listof IBM Hyper-Scale Manager users.

Overview 17



IBM Hyper-Scale Manager supports LDAP UPN mode onlywhen there are no domains configured on the system. Ifdomains are configured on the system, LDAP UPN mode is notsupported.

Workaround: Try configuring the system using different LDAPlogin modes.


During the deployment, FQDN host names in the format ofhostname.domain.com are required. If short host names are used(hostname part only), the deployment fails.

Workaround: Use a full FQDN name or IP address instead of ashort host name.


In some cases, the Spectrum Accelerate system might issue thefollowing error for some disks or disk controllers:

DISK_ERROR_SENSE_INFORMATION Disk xx:Disk:xx:xx had senseinformation indicating an error: xx/xx/xx (FRU=0000)ILLEGAL REQUEST - INVALID COMMAND OPERATION CODE.

This error can be ignored.



Incorrect Ethernet network speed is reported by both the GUIand CLI: 10 GbE is shown even if the actual speed is 1 GbE.



When collecting support logs, the following error might belogged:

DISK_ERROR_SENSE_INFORMATION Disk x:Disk:x:x had senseinformation indicating an error: xx/xx/xx (FRU=0000)ILLEGAL REQUEST - INVALID COMMAND OPERATION CODE

This error can be ignored.


SYS-274663 Low 11.5.3 orlater

When trying to configure IBM Hyper-Scale Mobility from asystem running a code version which supports volumemigration over iSCSI to a system with an earlier version, amisleading error code is received:OLVM_DOES_NOT_SUPPORT_ISCSI_TARGET


SYS-275453 Low 11.5.3 orlater

The component_identify command, that makes a drive in theserver enclosure blink, does not receive the drive's serial numberas an input parameter.

Workaround: Use the drive's unique identifier as an inputparameter rather than its serial number.


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