Document Number: 680-021-022 Rev. H March 2021 Storage Center 7.4 Release Notes This document describes the new features, enhancements, fixed issues, and known issues in Storage Center 7.4. Current Release Version: 7.4.21 Previous Release Version: 7.4.20 Topics: • • • • • • • • • • • Document Revision History Compatibility New in Storage Center 7.4.21 New in Storage Center 7.4.10 New in Storage Center 7.4.2 Storage Center 7.4 Feature Availability and Licenses Storage Center 7.
● SCv3000 Series ● SCv2000 Series NOTE: Storage Center 7.4 supports cabling mixed-speed expansion enclosures. SC400, SC420, and SC420F expansion enclosures can be cabled with SC200 and SC220 expansion enclosures. New in Storage Center 7.4.21 The following features and improvements were added to Storage Center 7.4.21: Live Volume with Auto Failover Support The Live Volume with Auto Failover feature supports the following hypervisor platforms in Storage Center 7.4.
● ● ● ● VMware VMware VMware VMware vSphere vSphere vSphere vSphere 6.7 6.5 6.0 5.5 Performance Improvements Storage Center 7.4 contains performance improvements to the Storage Center software . SSL Certificate Improvements Improvements have been made to SSL certificate handling to enable the following: ● Importing of chained SSL certificates ● Wildcard certificates Storage Center Initial Configuration with Unisphere The Unisphere web interface in Storage Center 7.
Windows Server 2019 Support for hosts running Windows Server 2019 has been added to Storage Center 7.4. Storage Center 7.4 Feature Availability and Licenses The core licenses and support for optional licensed features varies depending on the storage system.
Licenses/Bundles Optional Licenses Licensed Features ● ● ● ● ○ Data Instant Replay (Snapshots) ○ Manual Replay (Snapshots) Multi-VLAN Tagging Virtual Ports Volume QoS VVols ● ● ● ● ● Live Volume and Live Volume with Auto Failover Remote Instant Replay (Replication), including Cross-Platform Replication Replay Manager SED FIPS Secure Data Storage Manager Chargeback SC7020F and SC5020F Features and Licenses The following licensed features are supported on SC7020F and SC5020F all-flash storage systems:
Licenses/Bundles Licensed Features ● VVols Optional Licenses ● ● ● ● ● Live Volume and Live Volume with Auto Failover Remote Instant Replay (Replication), including Cross-Platform Replication Replay Manager SED FIPS Secure Data Storage Manager Chargeback Storage Protection Bundle ● Live Volume and Live Volume with Auto Failover ● Remote Instant Replay (Replication), including Cross-Platform Replication ● Replay Manager Storage Optimization Bundle ● Data Progression ● Fast Track Total Feature Bundle
SCv3000 Series Features and Licenses The following licensed features and optional value-added bundles are supported on SCv3000 series storage systems: Licenses/Bundles Licensed Features Core Software Bundle ● ● ● ● ● ● Data Compression Dell Storage Manager Dynamic Capacity Dynamic Controllers Live Migrate Local Data Protection ○ Data Instant Replay (Snapshots) ○ Manual Replay (Snapshots) ● Virtual Ports ● Volume QoS ● VVols Optional Licenses ● ● ● ● Live Volume and Live Volume with Auto Failover Repl
Storage Center 7.4 Scalability The following scalability guidelines apply to Storage Center 7.4: Storage System Scalability Guidelines The following scalability guidelines apply to SC9000, SC8000, SC7020F, SC7020, SC5020F, SC5020, SC4020, SCv3000 Series, and SCv2000 Series storage systems running Storage Center 7.4. Table 1.
Table 2.
Table 3. Storage Center Scalability Guidelines for SCv3000 Series Storage Systems Storage Center Object Supported Maximum Live Volumes ● 250 Live Volumes ● 150 Live Volumes with Auto-Failover QoS Profiles ● 100 Volume QoS Profiles ● 100 Group QoS Profiles ● 100 Volumes per Group QoS Profile Thin Import 10 volumes (maximum simultaneous imports) Table 4.
Table 6. Fixed Alert and Reporting Issues in Storage Center 7.4.10 Issue Description SCOS-58784 (was SCOS-58783) After updating to Storage Center 7.4.2, an SCv3000 series or SC5020 storage system with 1378 W low-line PSUs might see an alert stating that the PSUs are reporting an incorrect wattage. SCOS-58505 In the Storage Center Settings dialog box, when the Test Server link on the SMTP Server settings page is clicked, the email that is sent fails to use the text in the Common Subject Line field.
Table 9. Fixed Data Reduction Issues in Storage Center 7.4.2 Issue Description SCOS-55306 Data progression might become suspended and fail to resume if DPM defragment and data progression are running simultaneously. SCOS-54988 Secondary storage data might be erroneously recovered as lost space during data progression. SCOS-54249 On a storage system running deduplication, the deduplication ratio might be low because of an issue that prevents the deduplication dictionary from growing.
Table 12. Fixed Hardware Issues in Storage Center 7.4.2 Issue Description SCOS-56536 Read errors might occur if Storage Center attempts to read data from a T10-PI drive after a Crypto Erase has been performed, but before Storage Center initializes the drive. SCOS-55569 On storage systems that use Chelsio iSCSI HBAs with the T420 driver, the 768 MB limit of SG Payload pool size was increased to 1 GB to prevent iSCSI connection timeouts.
Table 16. Fixed Replication and Live Volume Issues in Storage Center 7.4.10 Issue Description SCOS-56743 Recovery from a restore point after Sync Live Volume Auto Failover might cause the size of an expanded volume to revert to the size of the volume prior to expansion. SCOS-56503 Applying a consistency group snapshot profile to a Storage Center volume fails if the volume has the same index value as a Live Volume on the Storage Center. Table 17.
Table 21. Fixed Storage Management Issues in Storage Center 7.4.20 Issue Description SCOS-60986 In a dual-controller storage system, a controller might reset because of a segment violation in a SCSI initiator command. SCOS-60721 RAID scrubs are placed on hold while Storage Center performs a RAID restripe.
Table 23. Fixed Storage Management Issues in Storage Center 7.4.2 Issue Description SCOS-57359 A controller might reset if Storage Center returns a null pointer to an associated virtualization volume or hypervolume. SCOS-56244 A controller might reset because of a memory leak. SCOS-56076 A controller might reset because of issues with metadata paging. SCOS-55944 Attempting to clear a disk spare hunger alert on a Storage Center might fail when the only remaining hungry device is deleted.
Table 23. Fixed Storage Management Issues in Storage Center 7.4.2 Issue Description SCOS-53429 When the SNMP settings on a Storage Center are changed and the SMTP subagent daemon is restarted, the log message that is displayed has been changed from: Warning,Daemon,,snmpSubagent: (((((((((((((SIGTERM))))))))))))) to SNMP Sub-agent daemon is restarting to reflect the updated configuration SCOS-53078 When a dual-controller storage system is updated from Storage Center 7.2 to Storage Center 7.
Table 25. Fixed User Interface Issues in Storage Center 7.4.2 Issue Description SCOS-52572 In rare instances, the Storage Manager Client might incorrectly display a Live Volume as a replication, if the Live Volume is mapped to a cluster with many servers. SCOS-51215 When an iSCSI interface is removed from a Storage Center fault domain, the IP address on the iSCSI interface is not released.
Known Issues Related to Hardware The following known issues are related to hardware: Table 28. Known Hardware Issues Issue Description SCOS-52646 The boot cycle of an SC9000 controller might stop responding or restart several times because of an issue in the BIOS or pre-boot sequence. Workaround: Perform a cold boot of the SC9000 controller by disconnecting both power cables from the controller, waiting one minute, and then reconnecting the power cables to controller.
Table 29. Known Replication and Live Volume Issues Issue Description 1. Remove the server from the cluster, or unmap the volume on the server side before making changes on the Storage Centers. 2. Delete the server on both Storage Centers, or unmap the volume on both Storage Centers. SCOS-14322 A one path to disk alert is generated when a Live Volume is created and there is only one replication path per controller.
Known Issues Related to Vendors The following known issues are related to vendors: Table 32. Known Vendor Issues Issue Description SCOS-62922 A Fibre Channel port may restart after being plugged into a Brocade Fibre Channel switch running Fabric OS v8.2.0, v8.2.1, or v8.2.2 that also has multiple logical switches configured. Workaround: Set the fabric.rdp_poll_cycle setting to 0 in the switch configuration for Fabric OS v8.2.0, v8.2.1, or v8.2.2. This issue is fixed in Fabric OS v8.2.3 and v9.0.0.
Support Resources The following sections provide resources for finding more information about using a Storage Center storage system: Storage Center Update Information Contact technical support to determine the Storage Center software version that is required to update to Storage Center 7.4. NOTE: When updating both the Storage Center and Storage Manager software, update the Storage Manager software before updating the Storage Center software.
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