Dell EMC PowerEdge Systems Running Red Hat Enterprise Linux 8 Release Notes September 2020 Rev.
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Contents Chapter 1: Release summary..........................................................................................................5 Version................................................................................................................................................................................... 5 Release date........................................................................................................................................................................
Red Hat Enterprise Linux Version 8 installation wizard creates a duplicate bonding interface ....................20 When system reboots, system stops responding at the end of the reboot process ...................................... 20 Unable to shut down RHEL 8 when you select Graceful shutdown option or when you press power button on the server.....................................................................................................................................................
1 Release summary Red Hat Enterprise Linux (RHEL) 8 is the follow-on Operating System (OS) release to the RHEL 7 operating system. Major enhancements in RHEL 8 are improvements in security and stability. Topics: • • • Version Release date Priority and recommendations Version 8.2 Release date April 2020 Priority and recommendations RECOMMENDED: Dell EMC recommends applying this update during your next scheduled update cycle.
2 Compatibility RHEL 8 is available on the 64-bit Intel architecture. Topics: • System configuration requirements System configuration requirements For detailed system configuration requirements for RHEL 8, see the documentation at www.redhat.com/support. Memory The following table lists the system memory requirements for the x86_64 architecture of RHEL 8. Table 1. Memory requirements for x86_64 architecture Memory Size Minimum recommended system memory 1.
3 Fixes Topics: • • • • • • • • • • • • • Servers with the AMD Rome processor display a CCP initialization failure message in dmesg PowerEdge servers with the AMD Rome processor fail to detect an NVMe drive after multiple hot plugs Operating system enters the dracut shell during boot System crashes when rebooted with SR-IOV-enabled QLogic cards After system reboot, Disk data format (DDF) devices are not listed in /proc/mdstat Updating NVMe firmware using the nvme-cli utility displays an error in dmesg Fata
1. Identify the parent device to which the NVMe device is connected using the following command: lspci -t -+-[0000:e0]-+-00.0 | +-00.2 | +-01.0 | +-02.0 | +-03.0 | +-03.1-[e2]----00.0 From the above snippet, the device e2:00.0 is the NVMe device and the device e0:03.1 is the parent device. The parent device is used for the steps that are described subsequently. 2. Read the Slot Status Register in the PCI Express Capability structure by running the following command: setpci -s e0:03.1 CAP_EXP+0x1a.
System crashes when rebooted with SR-IOV-enabled QLogic cards Description When the system is rebooted with SR-IOV-enabled QLogic cards, the system crashes and generates a coredump (vmcore) in /var/crash. Applies to Red Hat Enterprise Linux 8.0 and later Cause: The system crash is due to an issue in the qede driver. Workaround Disable SR-IOV before rebooting the system.
Systems affected: Dell EMC PowerEdge yx4x and yx5x servers Tracking number: 158536 Fatal error BDF 02:00.0 is detected with BCM574xx NICs Description: A fatal error on bus number 02, device number 00, and function number 0 (BDF 2:0.0) is observed in the following configurations: ● When a graceful shutdown action is initiated. ● In Gnome settings, under the Suspend & Power Button section, the When the Power Button is pressed option is set to Suspend. Applies to: Red Hat Enterprise Linux 8.
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 8.1 Cause: The i40e in-box driver is not enabled to detect an Intel x710 NIC. Workaround: Install the out-of-box drivers. Solution: The issue is resolved in Red Hat Enterprise Linux 8.
When booting the system from iSCSI with Mellanox CX-4 and CX-5 adapters, the system reports csum failure message Description: When booting the system from iSCSI with Mellanox CX-4 and CX-5 adapters, the following message is displayed in the dmesg and /var/log/messages reports: localhost kernel: ibft0: hw csum failure This message can be ignored. Applies to: Red Hat Enterprise Linux 8 Cause: Some networking switches which are sending frames with nonzero padding bytes maybe causing the issue.
Tracking number: 129907 Fixes 13
4 New and enhanced in RHEL 8 release ● ● ● ● ● ● ● ● ● ● Simple content structure available through BaseOS and Application Stream repository More life cycle options and frequent application updates YUM4 package manager is based on the DNF technology Increased security with memory Better management of System Processes Support for Control Group v2 mechanism Multiple packages of the kernel package Distributed with Stratis, a new local storage manager, which provides easy to use CLI and well designed API Syste
5 Important notes In the earlier versions of Red Hat Enterprise Linux, the default network interface naming scheme was biosdevname. From RHEL 8 onwards, systemd is the default naming scheme for network interface naming. NOTE: You can turn on the biosdevname naming scheme during installation or post installation by passing the kernel command line parameter biosdevname=1.
6 Known issues Topics: • • • • • • • • • • • • • • • • • • Advanced Configuration and Power Interface (ACPI) error messages displayed in dmesg Drivers available in OEMDRV drive are not installed during the operating system installation The Mellanox IB devices are listed under an incorrect device category on Red Hat Enterprise Linux 8 The lspci utility is unable to read Vital Product Data (VPD) from QLogic QLE2692 adapter Driver dependency mismatch errors reported while installing out-of-box drivers on Red
Drivers available in OEMDRV drive are not installed during the operating system installation Description: Intermittently, during the installation of Red Hat Enterprise Linux, the operating system cannot enumerate the USB drive at the stage of driver disk probing. This prevents the drivers from LC/OEMDRV from being installed. Applies to: Red Hat Enterprise Linux 8 and later Workaround: Use the kernel boot parameter command inst.dd=LABEL=OEMDRV to install the drivers in the OEMDRV drive.
Driver dependency mismatch errors reported while installing out-of-box drivers on Red Hat Enterprise Linux 8.x Description: Driver dependency mismatch errors are reported when inst.dd installation methods (flash drive, driver package, HTTP, NFS, FTP) are used to install the out-of-box (OOB) drivers during operating system installation. The dependency errors are not observed after the initial installation as the operating system will use the out-of-box (OOB) drivers.
Systems affected: Dell EMC PowerEdge yx4x and yx5x servers Tracking number: 164988 Link Up message is observed when the NVMe device slot is powered off and the device is unplugged Description: The message Link Up is observed in the dmesg log when the NVMe device slot is powered off and the device is unplugged by running the following command: echo 0 > /sys/bus/pci/slots//power The expected message is Link Down because the device is unplugged. Applies to: Red Hat Enterprise Linux 8.
Systems affected: ● PowerEdge R6525: Impacted slots are 1, and 2 ● PowerEdge R7525: Impacted slots are 1, 2, 3, 6, 4, 5, 7, and 8 Tracking number: 148546 iscsiadm output displays STATIC in the iface.bootproto field when the network interface is configured to DHCP Description: When the system is booting from iSCSI with the Emulex OneConnect device that is configured with DHCP IP, the iface.bootproto field is listed as STATIC in the command iscsiadm -m fw output. There is no functionality loss.
Workaround: To recover the system, perform any one of the following: ● Using iDRAC GUI, on the Dashboard page, click Graceful Shutdown drop-down, and then select Reset System(warm reboot). ● Restart the system by pressing the Power button.
Cause: From Red Hat Enterprise Linux 8 onwards, the software FCoE is deprecated. When software FCoE support is not enabled in the operating system, the bnx2fc driver uses the libfcoe module. Since FCoE works over VLAN 802.1Q, the relevant change needs to be implemented in 802.1Q network module. As these changes were never done, Red Hat Enterprise Linux 8 fails to discover FCoE LUN connected over Broadcom BCM57XXX NICs. Workaround: There is no workaround for this issue.
7 Limitations ● ● ● ● ● The auth and authconfig kickstart commands require the AppStream repository The --interactive option of the ignoredisk kickstart command does not work in RHEL 8 RHEL 8 system becomes unresponsive when many devices are connected Physical memory hot plugging does not work Database servers are not installable in parallel For more information on the limitations of RHEL 8, see www.access.redhat.com/documentation/en-us/ red_hat_enterprise_linux/8/html-single/8.
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 Location Setting up your server For information about installing the server into a rack, see the Rack documentation included with your rack solution or the Guida introduttiva that is shipped with your server. www.dell.com/poweredgemanuals For information about turning on www.dell.
Table 2. Additional documentation resources for your server (continued) Task Document Location For information about installing, using, and troubleshooting Dell EMC OpenManage Essentials, see the Dell EMC www.dell.com/ openmanagemanuals > OpenManage Essentials User’s Guide. www.dell.com/openmanagemanuals For information about installing and using Dell SupportAssist, see the Dell EMC SupportAssist Enterprise User's Guide. www.dell.
Topics: • Download drivers and firmware 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 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 field, and then click Submit.
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 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.
