IBM XIV Gen3 Storage System Release Notes for version 11.3.0 Second edition
Contents Release Notes............ 1 What's new in IBM XIV software version 11.3.0... 1 Availability of code load.......... 1 Availability of Host Attachment Kits (HAK).... 1 Miscellaneous.............. 2 Limitations............... 2 Known issues.............. 3 SYS-34235.............. 3 SYS-148227.............. 3 SYS-152613.............. 3 SYS-171172.............. 4 SYS-172696.............. 4 SYS-180287.............. 4 SYS-191045.............. 4 SYS-191368.............. 4 SYS-244218.............. 5 SYS-244455.............. 5 SYS-248188.............. 5 SYS-248452.............. 5 SYS-252614.............. 5 SYS-252743.............. 6 SYS-252858.............. 6 SYS-253004.............. 6 SYS-257063.............. 7 SYS-259268.............. 7 SYS-260214.............. 7 SYS-261241.............. 7 SYS-261265.............. 8 SYS-261371.............. 8 SYS-261516.............. 8 SYS-261524.............. 8 SYS-261545.............. 8 SYS-261567.............. 9 SYS-261828.............. 9 SYS-261875.............. 9 SYS-261890.............. 9 XIV logo LED............ 10 Fixed issues.............. 10 SYS-251334............. 10 SYS-254726............. 10 SYS-255376............. 10 SYS-260184............. 10 Copyrights.............. 11 Definitions of problem severity........ 11 Contacting IBM Support.......... 11 Documentation format........... 12 Notices and trademarks.......... 12 Copyright IBM Corp. 2013 iii
iv IBM XIV Gen3 Storage System: Release Notes for version 11.3.0 Second edition
Release Notes These release notes are for IBM XIV Gen3 Storage System Version 11.3.0. Release date 27 June 2013 What's new in IBM XIV software version 11.3.0 Availability of code load IBM XIV software version 11.3.0 for IBM XIV Storage System Gen3 delivers the following: IBM Hyper-Scale Mobility IBM Hyper-Scale Mobility is a powerful new feature that enables migration of a volume from one XIV frame to another with no interference to host applications. IBM Hyper-Scale Mobility helps streamline operational processes that typically challenge traditional systems, including capacity over-provisioning (with thinly-provisioned systems), load balancing among multiple systems, and technology refresh scenarios (e.g. array decommissioning). IBM Hyper-Scale Mobility brings dramatic operational flexibility to data centers and helps clients address scalability and management requirements for effective cloud computing. Key values: v IBM Hyper-Scale Mobility facilitates efficient placement of data on storage systems in a manner that is transparent to host applications v IBM Hyper-Scale Mobility minimizes downtime and administrative effort typically warranted under the following use case scenarios: A specific volume needs be migrated to another frame Capacity is over-provisioned and storage space is depleted Storage in multiple systems needs be load-balanced Support for 4TB drives IBM XIV software version 11.3.0 features support for 4TB drives. Support for 4TB drives increases the system's maximum usable capacity per rack up to 325TB and reduces the TCO/Power per TB. Systems featuring 4 TB disk drive modules have 48 GB RAM per module. This version supports code load from all versions since 11.0. The following topic, Preparing for code load, is available on the Information Center, detailing the steps required from the customer in order to prepare for the code load. http://publib.boulder.ibm.com/infocenter/ibmxiv/r2/topic/ com.ibm.help.xivgen3.doc/gen3/xiv_po_11_1_02.html Availability of Host Attachment Kits (HAK) IBM XIV Host Attachment Kit The latest IBM XIV Host Attachment Kit (HAK) version can be downloaded from the IBM Fix Central website: http://www.ibm.com/ support/fixcentral Copyright IBM Corp. 2013 1
IBM Storage Host Software Solutions Information Center For detailed usage information, refer to the IBM Storage Host Software Solutions Information Center: http://publib.boulder.ibm.com/infocenter/ strhosts/ic. Miscellaneous Limitations v The total number of hosts available for use is 994. v Systems with up to 3 failed drives can be upgraded. v The vol_mapping_list command is allowed for all users with read-only permission. v Systems featuring 4 TB disk drive modules have a maximum pool size capacity of 325 TB. v The total number of mirroring-related volumes on a single system includes IBM Hyper-Scale Mobility (non-proxy), and cannot exceed 1,536. 1. IBM Hyper-Scale Mobility applies to systems located within the same data center. 2. Using Hyper-Scale Mobility to mobilize volumes that are mapped to Unix or Linux hosts, and are backed-up using IBM Tivoli Storage FlashCopy Manager version 3.2 or earlier, is not supported. 3. IBM Hyper-Scale Mobility cannot be applied directly on a volume that belongs to a consistency group. Before such a volume can be moved using IBM Hyper-Scale Mobility, it must be removed from the consistency group. 4. IBM Hyper-Scale Mobility does not apply to volume snapshots. When the migration is changed to proxy state, all snapshots of the pertinent migrated volume are deleted automatically. 5. IBM Hyper-Scale Mobility does not migrate a volume that is in a mirroring relationships. Before a volume can be moved using IBM Hyper-Scale Mobility, its mirroring relationship must be deleted. 6. Using Hyper-Scale Mobility to mobilize volumes that are mapped to Windows Server hosts, and are backed-up using Microsoft Volume Shadow Copy, with IBM XIV Provider for Microsoft Windows Volume Shadow Copy (VSS) version 2.3.2 or earlier, is not supported. To use Hyper-Scale Mobility in this case, IBM XIV Provider for Microsoft Windows Volume Shadow Copy (VSS) version 2.4.0 or later must be installed. Note: IBM Tivoli Storage FlashCopy Manager for Windows is relying on Microsoft Volume Shadow Copy. To use Hyper-Scale Mobility with IBM Tivoli Storage FlashCopy Manager for Windows, IBM XIV Provider for Microsoft Windows Volume Shadow Copy (VSS) version 2.4.0 or later must be installed. 7. Using Hyper-Scale Mobility to mobilize volumes that are mapped to Windows Server hosts, and are protected by IBM Storage Enabler for Windows Failover Clustering version 1.1.0 or earlier, is not supported. To use Hyper-Scale Mobility in this case, IBM Storage Enabler for Windows Failover Clustering version 1.2.0 or later must be installed. Additional information may be available from the respective release notes of the products mentioned in the limitations: 2 IBM XIV Gen3 Storage System: Release Notes for version 11.3.0 Second edition
1. For IBM Tivoli Storage FlashCopy Manager for Unix and Linux please refer to release notes of version 4.1 or later. 2. For IBM XIV Provider for Microsoft Windows Volume Shadow Copy release notes, please refer to: http://pic.dhe.ibm.com/infocenter/strhosts/ic/ topic/com.ibm.help.strghosts.doc/vss-homepage.html. 3. For IBM Storage Enabler for Windows Failover Clustering, release notes, please refer to: http://pic.dhe.ibm.com/infocenter/strhosts/ic/index.jsp?topic= %2Fcom.ibm.help.strghosts.doc%2Fmscs-homepage.html. Known issues SYS-34235 When an SNMP server is defined by the server's DNS name, only its IPv4 address records are looked up and used. Workaround: To communicate with an SNMP server that supports only IPv6, use its IPv6 address rather than the host name. : Affected version: 11.1.0 and up SYS-148227 In rare cases, during Hot Upgrade procedure, Unit Attention is not sent to the hosts. The SCSI protocol uses Unit Attentions as a means for the storage controller to communicate with the host. When one host releases a LUN reservation, all other hosts that work with this LUN receive a Unit Attention updating them that they can access the data again. The Unit Attention arrives at the host as a response the next time the host issues an IO. The problem occurs whenever there was a code load between the time the unit attention was created and the time it is sent to the host. Moderate : 11.0.0 and up. SYS-152613 Under very heavy ESX load, an unresponsive module may cause loss of access to hosts. This is a known ESX issue that was fixed in ESX version 4.1. RE VMWare ticket: KB1016626. Moderate : 11.0.0 and up. Release Notes 3
SYS-171172 A delay during XIV boot can be detected in the XCLI session. During that time, XCLI commands can only be accessed using a developer account. Workaround Contact XIV Support. Moderate : 11.1.0 and up. SYS-172696 The IBM XIV Storage System works around various NTP issues by blocking NTP-driven time changes that are larger than 2 hours. For accurate time management, initially set the time to the correct value using the time_set XCLI command. After that, the system-clock will be well adjusted by NTP : 11.1.0 and up. SYS-180287 The list of events reported by an event_list XCLI command via one management IP address may be different comparing to running the same command via another management IP address. : 11.1.0 and up. SYS-191045 The GUI erroneously displays hosts that are deleted from the system. When a new host is added, the position on the statistics is reused and the new host will be shown. : 11.0.0 and up. SYS-191368 Events sent to the Center via SMTP are sent through the Management IP interface, instead of the VPN interface. Workaround When configuring the VPN interface netmask, consider Center's subnet as well. 4 IBM XIV Gen3 Storage System: Release Notes for version 11.3.0 Second edition
: 11.1.0 and up. SYS-244218 The ILLEGAL_BITS_VALUE completion code is returned whenever the length of a private key is not a multiply of 8. SYS-244455 The newline parameter of the pki_set_pkcs12 SSL import command does not support an * as a value. Workaround: Use the -w0 parameter when using the base64. For example:{{base64 -w0 mycert.pfx}}. : Minor Affected version: SYS-248188 Asynchronous mirroring: whenever the clocks of the master and slave systems differ by a gap that is greater than the RPO, the slave enters an RPO lagging state, while the master is in an OK state. Workaround Double check that the clock is set correctly on both systems. Moderate SYS-248452 When using the ipinterface_create XCLI command, and providing an illegal module number, the command returns a completion code of an illegal port. Workaround Please do not create a port on modules that don't have interfaces for this, or that don't exist. SYS-252614 Running the host_update XCLI command with the iscsi_chap_name parameter without specifying the -y flag, the command may fail. Release Notes 5
Workaround: Make sure you specify the -y flag. : Affected version: SYS-252743 Entering several certificates to the certificate parameter, ipsec_connection_* XCLI commands processes only the first certificate. Workaround Execute the relevant XCLI command for one certificate at a time. Medium SYS-252858 The Cache node may fail on any of the following scenarios: v v v Reactivating an asynchronous mirroring during initialization after pool depletion during rebuild / redist and performing IOS to the mirrored volume. Activating an asynchronous mirroring offline initialization during rebuild / redist and performing IOS to the mirrored volume. Reactivating an synchronous mirroring after the slave has changed role to master and back during rebuild / redist by running the snapshot_create XCLI command and performing IOS to the mirrored volume. Impact Performance hit or statistics loss in case of more than one Cache node failure. High Impact SYS-253004 Resizing a pool (reducing its volume capacity) does not trigger the STORAGE_POOL_VOLUME_USAGE_INCREASED event when crossing the preset threshold. Workaround Pay special attention when resizing down a pool. 6 IBM XIV Gen3 Storage System: Release Notes for version 11.3.0 Second edition
SYS-257063 When using IBM Hyper-Scale Mobility, on the Proxy phase, while the host is mapped to both the source volume and the destination volume (the source volume serves as a proxy to the destination), the system will not display a warning upon unmapping host from the proxy. Workaround: Prior to unmapping the Proxy, verify that: v The host is mapped to the volume on the Destination system v IOs are actually being executed on that path You can do that either from the host side or by using the XIV statistic tools on the Destination system. : Improvement Affected version: 11.3.0 and up SYS-259268 Upon module's boot completion, the 8 BIOS indicator LEDs on the back are turned off. SYS-260214 The ipinterface_update XCLI command has no default value and cannot define an IPv6 address if an IPv4 address was not previously defined. Workaround: Set an IPv4 address to the VPN interface. Then, set an IPv6 address. : Affected version: SYS-261241 Specifying a very high initialization rate for IBM Hyper-Scale Mobility through the max_init_rate XCLI command might impact the host I/O rate. Workaround: To increase the rate of IBM Hyper-Scale Mobility migration, use the default initialization rate initially, and gradually increase the rate while observing host I/O rate. : Moderate Affected version: 11.3.0 and up Release Notes 7
SYS-261265 The perf_class_list XCLI command does not display more than 55 hosts associated with a performance class. : Affected version: 11.0.0 and up SYS-261371 The statistics reported by the system for the I/O rates between an IBM Hyper-Scale Mobility proxy system and its IBM Hyper-Scale Mobility destination system might be higher than those reported from the host to the proxy system. This results from host IOs broken down into several IOs between the proxy and the destination. 11.3.0 and up SYS-261516 The update_host XCLI command might fail if the y argument is not specified. Workaround Use the force option (-y). 11.0.0 SYS-261524 The data migration commands dm_define and dm_activate might fail if the migration source is an XIV system with version 11.3.0. Workaround: Wait 10 seconds, then run the command again. If the command does not execute successfully after the first retry, retry again (up to the maximum number of connections from the first gateway to the data migration source system). : Affected version: 11.3.0 and up SYS-261545 When a host is mapped to a volume in Proxy state, and also mapped to that volume s destination volume on another system, if connectivity is lost between the systems, host I/Os to the destination volume might not get a response for up to 1 minute. 8 IBM XIV Gen3 Storage System: Release Notes for version 11.3.0 Second edition
Workaround Ensure that both systems are connected with a full redundancy FC network (going through two separate FC switches). High impact 11.3.0 SYS-261567 When using IBM Hyper-Scale Mobility, during the Proxy phase, while the host is mapped to both the source volume and the destination volume (the source volume serves as a proxy to the destination), if the user tries to delete the target using the target_delete XCLI command, the command succeeds without cleaning up the proxy volumes. Workaround: Delete a target only after deleting all volumes in Proxy state using that target. : Affected version: 11.3.0 and up SYS-261828 The number of spare drives reported by the system may be wrong. This does not affect the ability of the system to use the spare capacity. SYS-261875 SCSI Unit attentions might not be delivered correctly in an IBM Hyper-Scale Mobility environment. Please contact IBM service if you plan to use IBM Hyper-Scale Mobility in a clustered environment. High impact 11.3.0 SYS-261890 Creating an IBM Hyper-Scale Mobility relationship on a system where a migration target has been deleted can lead to loss of access. Workaround Do not delete a target that has been used for IBM Hyper-Scale Mobility relationships. Release Notes 9
Fixed issues High impact 11.3.0 XIV logo LED In rare cases and only in strong presence of a 150 MHz-induced radio frequency (RF) pulse toward the XIV system (types 114 and 214), the LED-lighted logo on the front door might cause module 5 to report a high-temperature internal event; therefore, the cable that feeds the XIV front-door LED is intentionally disconnected. As a result, the XIV front-door LED is no longer lit. There is no customer impact, and no is action required. SYS-251334 When a pool is changed from thin to thick or from thick to thin, a SCSI Unit Attention is not raised. Moderate SYS-254726 Systems with 10GB interface cards allow the user to define 4 ports although only two ports exist. : SYS-255376 When a zone disconnects or changes during mirroring, target connectivity might not connect automatically. : 11.0.0 and up SYS-260184 When using Data Migration without source updating and a read from the source volume fails, the XIV system may incorrectly indicate that the data on the source volume and target volume has been synchronized when, in fact, it is not. As a result, the data on the target volume on the XIV system might be incorrect. Should this occur, and the host has not yet overwritten the incorrect data by the time the system's periodical data scrubbing process (which can take up to 24 days 10 IBM XIV Gen3 Storage System: Release Notes for version 11.3.0 Second edition
to complete depending on configuration) reaches the incorrect data, the scrub process is capable of detecting that the primary and secondary partitions differ and should alert IBM service personnel of the issue if the remote support features have been enabled on the system. Hyper : 11.0.0 and up Copyrights Copyright IBM Corporation 2013. US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. References in this documentation to IBM products, programs, or services do not imply that IBM intends to make these available in all countries in which IBM operates. Any reference to an IBM product, program or service is not intended to state or imply that only IBM's product, program or service may be used. Any functionally equivalent product, program or service that does not infringe any of IBM's intellectual property rights may be used instead of the IBM product, program or service. Evaluation and verification of operation in conjunction with other products, except those expressly designated by IBM, are the user's responsibility. Definitions of problem severity Contacting IBM Support The following definitions denote issues severity: High impact v Acute / Serious Acute - An irrecoverable error with potential loss of data. Serious - An irrecoverable error with potential loss of access to data. v HYPER - An high impact problem that is pervasive: 3 or more occurrences. Moderate A function not operational and/or performance might be degraded. A recoverable error (no impact) and service improvement. Improvements Changes made for the purpose of better usability and serviceability. The release is supported via: Voice calls Will come into Level 1 or Front Line Support as they do for the current product. Customers will use the appropriate support phone number for their respective countries; refer to the World Wide Directory for the support numbers by country. http://www.ibm.com/planetwide Release Notes 11
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v v v IBM DISCLAIMS ANY AND ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS WITH RESPECT TO THE EXCLUDED COMPONENTS, INCLUDING, BUT NOT LIMITED TO, THE WARRANTY OF NON-INFRINGEMENT OR INTERFERENCE AND THE IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IBM will not be liable to you or indemnify you for any claims related to the Excluded Components IBM will not be liable for any direct, indirect, incidental, special, exemplary, punitive or consequential damages with respect to the Excluded Components. Release Notes 13
14 IBM XIV Gen3 Storage System: Release Notes for version 11.3.0 Second edition
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