Release Notes
Table Of Contents
- Dell EMC PowerEdge Systems Running SUSE Linux Enterprise Server 15 Release Notes
- Contents
- Release summary
- Compatibility
- New and enhanced in this release
- Fixes
- /var/log/messages displays kernel warning messages in servers with NVDIMM-N persistent memory modules
- /proc/mdstat and mdadm -D commands display incorrect statuses when two NVMe devices are surprise removed from a RAID 5 MD array
- BIOS update does not complete when an update is performed using the Linux .BIN files
- The owsmangencert.sh script fails and reports an error
- RAID level is displayed incorrectly when a virtual disk created by Dell EMC RAID Controller S150 is degraded
- Status of the RAID 0 LV is displayed as Available when one of the members of the RAID array is surprise removed
- Logical Volume Manager (LVM) does not activate a free physical volume when one of the NVMe devices is surprise removed
- The dmidecode utility displays the slot type as
for PCIe Gen 4 NVMe slots - Software RAID virtual disk not detected during SLES 15 installation
- Running supportconfig reboots the server with AMD processor
- Root user login fails after run level is switched
- ACPI error messages are displayed
- Unable to create or modify namespace for NVDIMM
- Dell EMC PowerEdge AMD Server is not booting to OS after enabling the SME/SEV feature
- When system reboots, system stops responding at the end of the reboot process
- Servers with the AMD Rome processor are unable to read the boost states using cpupower
- PowerEdge servers with the AMD Rome processor fail to detect an NVMe drive after multiple hot plugs
- When booting the system from iSCSI with Mellanox CX-4 and CX-5 adapters, the system reports csum failure message
- Linux operating system fails to detect the Intel x710 card
- System crashes when rebooted with SR-IOV-enabled QLogic cards
- Component updates in systems with iSM installed on SUSE Linux Enterprise Server 15 SP1 operating system generates watchdog timer expired messages
- Systems with the AMD Rome processor display a CCP and PSP initialization failure messages in dmesg
- After kernel update, the NFIT errors are displayed
- System reboots when high-level storage I/O operations are performed on NVMe drives
- Known issues
- vsftpd utility may be terminated by out of memory killer process
- Dell Controlled Turbo feature is not functional
- The operating system installer does not display the MD virtual disks created using Dell EMC Software RAID Controller under the guided setup
- MD RAID layer is not notified of the surprise removal of Samsung NVMe devices
- Unable to shut down SLES when the graceful shutdown option from iDRAC is selected or when power button is pressed on the server
- Limitations
- Instructions for installing and upgrading SLES
- Resources and support
- Contacting Dell EMC
Systems
affected:
PowerEdge R6515, PowerEdge R6525, PowerEdge R7515, PowerEdge R7525, and PowerEdge C6525
Tracking number: 125732
After kernel update, the NFIT errors are displayed
Description: When a system with NVDIMM-N/AEP is booted into SUSE Linux Enterprise Server 15 SP1, dmesg
displays unknown symbol messages. This issue is cosmetic.
The following are examples of NVDIMM firmware interface table (NFIT) error messages that are displayed
in dmesg:
● Unknown symbol nvdimm_blk_region_create (err 0)
● Unknown symbol nvdimm_region_notify (err 0)
● Unknown symbol to_nvdimm_bus (err 0)
Applies to: SUSE Linux Enterprise Server 15 SP1
Solution: The issue is resolved in SUSE Linux Enterprise Server 15 SP2.
Systems
affected:
Dell EMC PowerEdge yx4x and yx5x servers
Tracking number: 156042
System reboots when high-level storage I/O
operations are performed on NVMe drives
Description:
When the level of system storage I/O operations is high, the NMI watchdog reports a CPU hard lockup.
The following message is displayed in dmesg, and the system reboots:
NMI watchdog: Watchdog detected hard LOCKUP on cpu 70
This issue is observed when NVMe drives have the ext4 or ext3 file systems. When NVMe drives have the
XFS file systems, this issue is not observed.
Applies to: SUSE Linux Enterprise Server 15 SP1
Cause: There is an issue with the writeback throttling.
Workaround: Run the following command:
echo 0 > /sys/block/nvme0n1/queue/wbt_lat_usec
NOTE: This workaround may impact system performance. It is recommended that you upgrade the
kernel version of your system to kernel-default-4.12.14-197.18.1 and later.
Systems
affected:
PowerEdge R6515, PowerEdge R6525, PowerEdge R7515, PowerEdge R7525, and PowerEdge C6525
Tracking number: 155883
Fixes 17