Dell EMC PowerEdge Systems Running Red Hat Enterprise Linux 7 Release Notes May 2021 Rev.
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. © 2014-2021 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries.
Contents Chapter 1: Release summary..........................................................................................................7 Version....................................................................................................................................................................................7 Release date........................................................................................................................................................................
iscsiadm output displays STATIC in the iface.bootproto field when the network interface is configured to DHCP..................................................................................................................................................... 22 When system reboots, system stops responding at the end of the reboot process .......................................23 NMI watchdog reports CPU soft lockup .............................................................................................
Turbostat displays incorrect information.....................................................................................................................36 Ethtool reports a lower port speed...............................................................................................................................36 Red Hat Enterprise Linux 7.3 displays an error message for drivers....................................................................
ras-mc-ctl command displays DIMM labels related error message.......................................................................47 Chapter 7: Limitations................................................................................................................. 49 Chapter 8: Resources and support.............................................................................................. 50 Download drivers and firmware...............................................................................
1 Release summary Topics: • • • Version Release date Priority and recommendations Version 7.9 Release date September 2020 Priority and recommendations RECOMMENDED: Dell EMC recommends applying this update during your next scheduled update cycle. The update contains feature enhancements or changes that help keep your system software current and compatible with other system modules (firmware, BIOS, drivers, and software).
2 Compatibility Topics: • System configuration requirements System configuration requirements For detailed system configuration requirements of this version of Red Hat Enterprise Linux, see the documentation at www.redhat.com/support. Memory The following table lists the system memory requirements for the x86_64 architecture of Red Hat Enterprise Linux 7. Table 1.
3 New and enhanced in RHEL 7.x release The current release of RHEL 7.x incorporates bug fixes. Topics: • Installation and upgrade instructions Installation and upgrade instructions For information on installing or upgrading from a previous version of Red Hat Enterprise Linux 7, see Installation Instructions and Important Information Guide at https://www.dell.com/operatingsystemmanuals. New and enhanced in RHEL 7.
4 Fixes Topics: • • • • • • • • • • • • The mcelog utility logs 'only decoding architectural errors' message in var/log/messages An error message is displayed when the internal SATA optical drive is empty during UEFI boot FCoE session is not reestablished after MX9116N switch is rebooted Disk drives part of MD RAID are not listed as installation destination by the installer Dell EMC OpenManage Storage Services utility fails to reconfigure the virtual disk Operating system crashes when twenty DIMMs are conn
Systems affected: Dell EMC PowerEdge servers that support certain internal SATA optical drive models. Tracking number: 189609 FCoE session is not reestablished after MX9116N switch is rebooted Description: On Dell EMC PowerEdge MX740C systems containing Qlogic QL41000 series CNA devices configured for FCoE, FCoE session is not restored automatically when the MX9116N switch is rebooted. Applies to: Red Hat Enterprise Linux 7.7 and later.
dmesg also show the following messages: megaraid_sas 0000:01:00.0: Failed to alloc kernel SGL buffer for IOCTL megaraid_sas 0000:01:00.0: Failed to alloc kernel SGL buffer for IOCTL The issue may occur when the operating system is under pressure for high-order memory. Applies to: Red Hat Enterprise Linux 7.9 Workaround: Reconfigure the virtual disk from the Integrated Dell Remote Access Controller (iDRAC). Cause: By default, the cache setting for VMs is set to write back.
Dell EMC Express Flash Enterprise NVMe CD6/CM6 device is not detected by the kernel Description: Dell EMC Express Flash Enterprise NVMe CD6/CM6 device is not detected by the operating system when connected to a Dell EMC PowerEdge server which runs on a Red Hat Enterprise Linux. Applies to: Red Hat Enterprise Linux 7.6 and later Workwround: Use the command-line parameter nr_cpus=255 during and after the installation, only if the number of processors in the system is greater than or equal to 256.
Systems affected: Dell EMC PowerEdge R6515, Dell EMC Power Edge R7515, Dell EMC PowerEdge R6525, Dell EMC PowerEdge R7525, Dell EMC PowerEdge C6525 Tracking number: 171534 Dell EMC PowerEdge Express Flash Enterprise NVMe Agnostic (AGN) device causes the system to stop responding Description: A system crash is observed when a Dell EMC PowerEdge Express Flash Enterprise NVMe Agnostic (AGN) device is connected to a Dell EMC PowerEdge server running Red Hat Enterprise Linux 7.6.
Dmesg displays error messages when Broadcom BCM57504 25GB is used on Red Hat Enterprise Linux 7.8 Description: The following error messages are observed in the dmesg on Red Hat Enterprise Linux 7.8 with Broadcom BCM57504 25GB adapter when NIC and RDMA mode is enabled in the system BIOS device settings: [ 8.597987] bnxt_en 0000:01:00.0 em2: hwrm req_type 0x50 seq id 0x21 error 0x4 The message indicates that RoCE is not functional. Applies to: Red Hat Enterprise Linux 7.
5 Important notes Not Applicable.
6 Known issues Topics: • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Intel E810 NIC interfaces are not functional on AMD Rome CPU based systems acpi_pad threads are not spawned as expected when power capping is enabled in iDRAC Dell Controlled Turbo feature is not functional The dmidecode utility displays the slot type as for PCIe Gen 4 NVMe slots Access Vector Cache (AVC) denial messages are displayed when NVMe disk is hot inserted QLogic Gen7 Fibr
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 18 Disabling SRIOV-vfs of Mellanox-ConnectX-4 cards results in terminal hang mei_me displays hardware start failed messages Intel - Sage Flat - ISCSI LUN is not discovered during Red Hat Enterprise Linux 7 OS installation Watchdog timer function did not work on Red Hat Enterprise Linux 7.2 Recovery is not starting on RAID 01 virtual disk when I/Os are in progress Red Hat Enterprise Linux 7.
• ras-mc-ctl command displays DIMM labels related error message Intel E810 NIC interfaces are not functional on AMD Rome CPU based systems Description: The E810 NIC interfaces are not functional on AMD Rome CPU based systems when the number of logical CPUs is greater than 124. Applies to: Red Hat Enterprise Linux 7.9 Workaround: On systems when the number of logical CPUs is greater than 124, then nr_cpus=124 kernel command line parameter can be passed as a workaround to fix this issue.
The dmidecode utility displays the slot type as for PCIe Gen 4 NVMe slots Description: The dmidecode utility displays the Slot Type field of Type 9 record as for PCIe Generation 4 NVMe slots. Applies to: Red Hat Enterprise Linux 7.6 and later Cause: The dmidecode utility does not support the Slot Type value of 0x24 that is defined in System Management BIOS (SMBIOS) version 3.4.
Linux operating system fails to detect the Intel x710 card Description: The i40e in-box driver is not enabled to detect an Intel x710 NIC. NIC details can be identified by running the command lspci. The output of the command is as follows: Ethernet controller: Intel Corporation Ethernet Controller x710 for 10GBASE-T Vendor ID: 8086 Device ID: 15FF Applies to: Red Hat Enterprise Linux 7.7 and later Cause: The i40e in-box driver is not enabled to detect an Intel x710 NIC.
For more information, see Red Hat Knowledge Base article 4991311. Solution: The issue is resolved in Red Hat Enterprise Linux 7.8 and later. For more information, see Red Hat Enterprise Linux Knowledge Base article 4991311.
Applies to: Cause: Not available Workaround: Not available Systems affected: Dell EMC PowerEdge yx3x servers that support Emulex OneConnect Tracking number: 147877 When system reboots, system stops responding at the end of the reboot process Description When the system reboots, system stops responding at the end of the reboot process. When the system is in this state, it does not respond to keyboard or mouse device and iDRAC virtual console displays the No signal message.
Chipset watchdog device is not created when the OS Watchdog Timer option is enabled in BIOS Description: On the Dell EMC PowerEdge T140, R240, and T340 servers, if the OS Watchdog timer is enabled in BIOS, then the watchdog device node is not created and watchdog does not run. Applies to: Red Hat Enterprise Linux 7.5 Cause: Intel has replaced iTCO with the WDAT watchdog for these platforms. However, WDAT is not supported on RHEL 7.5. Workaround: Use BMC watchdog with the systems.
NMI message is displayed on Dell EMC AMD systems with NVMe SSDs Description: While running high intensity I/O on NVMe drives connected to Dell EMC AMD system with EPYC processor, the system displays the following message: Uhhuh. NMI received for unknown reason 2d on CPU 59. Applies to: Red Hat Enterprise Linux 7.4 Cause: The AMD iommu driver code used in RHEL 7.4 is old and does not have fixes and enhancements that are available in the upstream kernel.
Network throughput may not be as expected on Broadcom 25 GB or QLogic 25 GB network cards Description: On Dell EMC's yx4x PowerEdge R7425, R7415, and R6415 servers, the network throughput may not be as expected on Broadcom 57414 Dual Port 25 GB or QLogic FastLinQ 41262 Dual Port 25 GB network cards. Applies to: Red Hat Enterprise Linux 7.4 on Dell EMC's yx4x PowerEdge R7425, R7415, and R6415 servers Cause: IOMMU queue flush and queue management changes are required.
Red Hat Enterprise Linux 7.4 with QLogic QL41xxx rNDC cards ping fails Description: On Dell EMC's yx4x PowerEdge servers with Red Hat Enterprise Linux 7.4 communication fails on QL41xxx Qlogic rNDC cards Applies to: Red Hat Enterprise Linux 7.4 with firmware version 14.02.15 Cause: Incompatible driver with latest firmware Workaround: Use Qlogic drivers version 8.23 provided by Dell EMC. Solution: Update Qlogic drivers from www.access.redhat.com/errata/RHEA-2017:3489.
Cause: The Tracker-Extract is a module in Tracker that is extracting metadata from all the files in the system is reading its own cache incorrectly. Workaround: This error message can be ignored because there is no functionality loss. NVMe drive model is displayed as unknown in parted Description: On Dell EMC PowerEdge servers with NVMe drives, parted command lists NVMe drive model as unknown and displays an error message: unrecognized disk label. Applies to: Red Hat Enterprise Linux 7.
NOTE: This Solution is applicable only for Red Hat Enterprise Linux 7.5. Red Hat Enterprise Linux 7 displays incorrect welcome message Description: While installing Red Hat Enterprise Linux 7.x, the incorrect variant is displayed in the welcome message. For example: Welcome to Red Hat Enterprise Linux Client 7.3 (Maipo). Applies to: Red Hat Enterprise Linux 7.0, 7.1, 7.2, 7.3, 7.4, and 7.5 Cause: This issue occurs due to incorrect references in the ISO build environment at Red Hat.
Unable to shut down Red Hat Enterprise Linux 7 when you select Graceful shutdown option or when you press power button on system Description: When you select the Graceful shutdown option from any system management interface such as iDRAC or press the power button, the system goes to suspended state and stops all the tasks or does nothing. So, firmware updates through iDRAC would take longer than expected as iDRAC sends out Graceful shutdown signal but the system does not shut down.
Installer displays an exception when installing on an iSCSI disk using QLogic QL41000 qedi based drivers Description: A system with QLogic QL41000 qedi based drivers, during the installation of RHEL 7.4 on an iSCSI disk using the qedi transport, installer displays an exception message. Applies to: Red Hat Enterprise Linux 7.4 Cause: Boot from iSCSI using the qedi based driver offload function does not work on RHEL 7.4 because the following patches are missing in the qedi driver due to which RHEL-7.
ip link/ifconfig displays RX dropped packets for QL41xxx based interfaces Description: On RHEL 7.
Unable to boot to iSCSI after enabling VLAN Description: Red Hat Enterprise Linux 7.2 does not boot to iSCSI after enabling VLAN. Applies to: Red Hat Enterprise Linux 7.2 Cause: Red Hat Enterprise Linux 7.2 is unable to create VLAN interface using ibft table. Workaround: To boot to iSCSI, add the command ip=ibft to the kernel command line.
Intel - Sage Flat - ISCSI LUN is not discovered during Red Hat Enterprise Linux 7 OS installation Description: Installation of Red Hat Enterprise Linux 7.3 on an iSCSI LUN through Intel-X550 card fails to autodiscover the iSCSI LUN. This leads to installation failure. Applies to: Red Hat Enterprise Linux 7.3, 7.4, and 7.
Cause: Red Hat Enterprise Linux 7.3 kernel is still following ACPI-5.0 specification, while BIOS is already moved to ACPI-6 specification. Because of this upgrade in version, FADT table is not recognized by Red Hat Enterprise Linux 7.3 GA OS, which is still following ACPI-5.0 specification. Workaround: There is no workaround that is currently available for this issue. Red Hat Enterprise Linux 7.
Applies to: Red Hat Enterprise Linux 7.2 Cause: Irq balancer scans the isolcpus and nohz_full kernel masks and adds the corresponding CPUs to the banned_cpus mask. This works fine for valid masks, but not for the default, emtpy masks. In this case when they read from the sysfs they return empty strings, "\n" or "0x0, \n": Workaround: A workaround is to uncomment the following from /etc/sysconfig/irqbalance: #IRQBALANCE_BANNED_CPUS= Coretemp driver adds a limited number of cores Description: On the De
localhost udisksd[5705]: Error performing housekeeping for drive /org/ freedesktop/UDisks2/drives/INTEL_SSDSC2BB120G6R_PHWA62120160120CGN: Error updating SMART data: sk_disk_check_sleep_mode: Input/output error (udiskserror-quark, 0) Applies to: Red Hat Enterprise Linux 7.3 Cause: When read S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) status commands testing for hard drive success or failure value that includes 8 bits, which are N/A according to the standard but should be zeroes.
Cause: After the S130 volume is degraded, the volume is designed to go to read-auto and is marked as inactive during the next reboot. Workaround: Run mdadm --R /dev/md to set the volume to be detected in degraded mode even after a reboot. Unable to install Red Hat Enterprise Linux 7 in the 16th hard drive slot by using unattended installation Description: Unable to install Red Hat Enterprise Linux 7 in the 16 th hard drive slot by using unattended installation.
ACPI displays warning message when system IO range conflicts Description: The Advanced Configuration and Power Interface (ACPI) displays a warning message, if there is a conflict between the system input/output (IO) and operation address range (OpRange). Applies to: Red Hat Enterprise Linux 7.2 Cause: The latest kernel in Red Hat Enterprise Linux 7.2 with ACPI_check_resource_conflict() checks for the entire address range for a particular device.
Red Hat Enterprise Linux 7 displays an error message in /var/log/messages Description: After restarting Red Hat Enterprise Linux 7, the PCIe devices display an error message in the /var/log/messages log file kernel: pci 0000:01:00.0: can't claim BAR 6 [mem 0xfff80000-0xffffffff pref]: no compatible bridge window. Applies to: Red Hat Enterprise Linux 7.2 Cause: The addresses of the expansion ROM BARs do not contain accurate values.
Installation on iSCSI LUN displays few unknown symbol messages Description: While installing Red Hat Enterprise Linux 7 on iSCSI LUN, the system displays few Unknown symbol messages in the /var/log/messages log file. Applies to: Red Hat Enterprise Linux 7.0 Cause: The message is displayed because of the iSCSI drives are compiled with different versions of header files. Workaround: This error message can be ignored because there is no functionality loss.
Installing Red Hat Enterprise Linux 7 by using the iDRAC Virtual Media does not resume if the iDRAC network is set to the shared LOM mode Description: When installing Red Hat Enterprise Linux 7 by using the iDRAC Virtual Media, where the iDRAC network is set to Shared LOM mode, Red Hat Enterprise Linux 7 installer initiates a reset on the LAN on Motherboard (LOM) devices.
Invalid naming conventions for the ports of Emulex OneConnect OCe14102-UX-D card when NPAR-EP is enabled Description: Red Hat Enterprise Linux 7.0 with Emulex OneConnect OCe14102-UX-D card naming conventions by biosdevname may not be accurate for all the networking devices. As a result partitions 3 and 4 of all the four ports of Emulex is not named as expected. Applies to: Red Hat Enterprise Linux 7.0 Cause: Biosdevname has the Limitation, which cannot handle more than 7 PCI functions.
While adding second slave to bond, it asks for connection type and shows additional connection types Description: To create the bonding interference between the master and the slave, slave asks for connection type and displays additional connection types. Applies to: Red Hat Enterprise Linux 7.0 Cause: Network manager does not filter the type of connection required for the slave. Workaround: This issue can be ignored because there is no functionality loss.
VMM does not displays Windows Server 2012 in dropdown list Description: Virtual Machine Manager (VMM) does not display Windows Server 2012 in the drop-down list of a new Virtual Machine window. Applies to: Red Hat Enterprise Linux 7.0 Cause: There is no entry created for Windows Server 2012 in the VMM. Workaround: There is no functionality loss. You can install Windows Server 2012 after selecting any generic windows item from the drop-down list.
Reading EEPROM from a Broadcom device via ethtool results in soft lockup Description: With Broadcom network adapters, reading EEPROM via ethtool –e results in CPU soft lock, when cable is not connected to the port. Applies to: Red Hat Enterprise Linux 7.0 Cause: When cable is not connected, the clock speed of the device becomes slow, based on the power saving mode setting defined in NVRAM. Due to this, EEPROM reads take a long time to complete and results in CPU soft lockup.
Cause: The Mellanox driver does not set the 40 GB bits in advertised and supported links. Workaround: This issue can be ignored because there is no functionality loss. Unable to install Red Hat Enterprise Linux 7 on a drive with an existing btrfs partition Description: During Red Hat Enterprise Linux 7 installation after selecting a drive with existing btrfs file system, the Anaconda installer is not able to delete the btrfs partitions. Applies to: Red Hat Enterprise Linux 7.
Cause: rasdaemon is unable to get the DIMMs details from the SQLite datebase. Also, rasdaemo cannot guess the DIMMs label using the dmidecode for the new memory controllers. Workaround: This error message can be ignored because there is no functionality loss.
7 Limitations Not Applicable.
8 Resources and support This section provides information about the documentation resources for your server. Table 2. Additional documentation resources for your server Task Document Setting up your server https://www.dell.com/poweredgemanuals For information about installing the server into a rack, see the rack documentation included with your rack solution or the Getting Started Guide that is shipped with your server.
Table 2. Additional documentation resources for your server (continued) Task Document Location the Dell EMC www.dell.com/ openmanagemanuals > OpenManage Essentials User’s Guide. For information about installing and using Dell SupportAssist, see the Dell EMC SupportAssist Enterprise User's Guide. https://www.dell.com/serviceabilitytools For understanding the features of Dell EMC Lifecycle Controller (LC), see the Lifecycle Controller User's Guide. https://www.dell.
Download drivers and firmware It is recommended that you download and install the latest BIOS, drivers, and systems management firmware on your system. Ensure that you clear the web browser cache before downloading the drivers and firmware. 1. Go to www.dell.com/support/drivers. 2. In the Drivers & Downloads section, enter the Service Tag of your system in the Enter a Dell Service Tag, Dell EMC Product ID, or Model text box, and then click the right arrow button.
9 Contacting Dell EMC Dell EMC provides several online and telephone-based support and service options. Availability varies by country, region, and product, and some services may not be available in your area. To contact Dell EMC for sales, technical assistance, or customer service issues, see https://www.dell.com/contactdell. If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing slip, bill, or the product catalog.
